Guard ruby/spec with spec/mspec/tool/wrap_with_guard.rb

Merged: https://github.com/ruby/ruby/pull/4530

spec/ruby/library/matrix/I_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/identity'
 
-describe "Matrix.I" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_identity, :I
+  require_relative 'shared/identity'
+
+  describe "Matrix.I" do
+    it_behaves_like :matrix_identity, :I
+  end
 end

spec/ruby/library/matrix/antisymmetric_spec.rb

@@ -1,36 +1,39 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-ruby_version_is "2.6" do
+ruby_version_is ""..."3.1" do
-  describe "Matrix#antisymmetric?" do
+  require 'matrix'
-    it "returns true for an antisymmetric Matrix" do
-      Matrix[[0, -2, Complex(1, 3)], [2, 0, 5], [-Complex(1, 3), -5, 0]].antisymmetric?.should be_true
-    end
 
-    it "returns true for a 0x0 empty matrix" do
+  ruby_version_is "2.6" do
-      Matrix.empty.antisymmetric?.should be_true
+    describe "Matrix#antisymmetric?" do
-    end
+      it "returns true for an antisymmetric Matrix" do
-
+        Matrix[[0, -2, Complex(1, 3)], [2, 0, 5], [-Complex(1, 3), -5, 0]].antisymmetric?.should be_true
-    it "returns false for non-antisymmetric matrices" do
-      [
-        Matrix[[1, 2, 3], [4, 5, 6], [7, 8, 9]],
-        Matrix[[1, -2, 3], [2, 0, 6], [-3, -6, 0]],  # wrong diagonal element
-        Matrix[[0, 2, -3], [2, 0, 6], [-3, 6, 0]]    # only signs wrong
-      ].each do |matrix|
-        matrix.antisymmetric?.should be_false
       end
-    end
 
-    it "raises an error for rectangular matrices" do
+      it "returns true for a 0x0 empty matrix" do
-      [
+        Matrix.empty.antisymmetric?.should be_true
-        Matrix[[0], [0]],
+      end
-        Matrix[[0, 0]],
+
-        Matrix.empty(0, 2),
+      it "returns false for non-antisymmetric matrices" do
-        Matrix.empty(2, 0),
+        [
-      ].each do |rectangular_matrix|
+          Matrix[[1, 2, 3], [4, 5, 6], [7, 8, 9]],
-        -> {
+          Matrix[[1, -2, 3], [2, 0, 6], [-3, -6, 0]],  # wrong diagonal element
-          rectangular_matrix.antisymmetric?
+          Matrix[[0, 2, -3], [2, 0, 6], [-3, 6, 0]]    # only signs wrong
-        }.should raise_error(Matrix::ErrDimensionMismatch)
+        ].each do |matrix|
+          matrix.antisymmetric?.should be_false
+        end
+      end
+
+      it "raises an error for rectangular matrices" do
+        [
+          Matrix[[0], [0]],
+          Matrix[[0, 0]],
+          Matrix.empty(0, 2),
+          Matrix.empty(2, 0),
+        ].each do |rectangular_matrix|
+          -> {
+            rectangular_matrix.antisymmetric?
+          }.should raise_error(Matrix::ErrDimensionMismatch)
+        end
       end
     end
   end

spec/ruby/library/matrix/build_spec.rb

@@ -1,73 +1,76 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix.build" do
+ruby_version_is ""..."3.1" do
+  require_relative 'fixtures/classes'
+  require 'matrix'
 
-  it "returns a Matrix object of the given size" do
+  describe "Matrix.build" do
-    m = Matrix.build(3, 4){1}
+
-    m.should be_an_instance_of(Matrix)
+    it "returns a Matrix object of the given size" do
-    m.row_size.should == 3
+      m = Matrix.build(3, 4){1}
-    m.column_size.should == 4
+      m.should be_an_instance_of(Matrix)
+      m.row_size.should == 3
+      m.column_size.should == 4
+    end
+
+    it "builds the Matrix using the given block" do
+      Matrix.build(2, 3){|col, row| 10*col - row}.should ==
+        Matrix[[0, -1, -2], [10, 9, 8]]
+    end
+
+    it "iterates through the first row, then the second, ..." do
+      acc = []
+      Matrix.build(2, 3){|*args| acc << args}
+      acc.should == [[0, 0], [0, 1], [0, 2], [1, 0], [1, 1], [1, 2]]
+    end
+
+    it "returns an Enumerator is no block is given" do
+      enum = Matrix.build(2, 1)
+      enum.should be_an_instance_of(Enumerator)
+      enum.each{1}.should == Matrix[[1], [1]]
+    end
+
+    it "requires integers as parameters" do
+      -> { Matrix.build("1", "2"){1} }.should raise_error(TypeError)
+      -> { Matrix.build(nil, nil){1} }.should raise_error(TypeError)
+      -> { Matrix.build(1..2){1} }.should raise_error(TypeError)
+    end
+
+    it "requires non-negative integers" do
+      -> { Matrix.build(-1, 1){1} }.should raise_error(ArgumentError)
+      -> { Matrix.build(+1,-1){1} }.should raise_error(ArgumentError)
+    end
+
+    it "returns empty Matrix if one argument is zero" do
+      m = Matrix.build(0, 3){
+        raise "Should not yield"
+      }
+      m.should be_empty
+      m.column_size.should == 3
+
+      m = Matrix.build(3, 0){
+        raise "Should not yield"
+      }
+      m.should be_empty
+      m.row_size.should == 3
+    end
+
+    it "tries to calls :to_int on arguments" do
+      int = mock('int')
+      int.should_receive(:to_int).twice.and_return(2)
+      Matrix.build(int, int){ 1 }.should == Matrix[ [1,1], [1,1] ]
+    end
+
+    it "builds an nxn Matrix when given only one argument" do
+      m = Matrix.build(3){1}
+      m.row_size.should == 3
+      m.column_size.should == 3
+    end
   end
 
-  it "builds the Matrix using the given block" do
+  describe "for a subclass of Matrix" do
-    Matrix.build(2, 3){|col, row| 10*col - row}.should ==
+    it "returns an instance of that subclass" do
-      Matrix[[0, -1, -2], [10, 9, 8]]
+      MatrixSub.build(3){1}.should be_an_instance_of(MatrixSub)
-  end
+    end
-
-  it "iterates through the first row, then the second, ..." do
-    acc = []
-    Matrix.build(2, 3){|*args| acc << args}
-    acc.should == [[0, 0], [0, 1], [0, 2], [1, 0], [1, 1], [1, 2]]
-  end
-
-  it "returns an Enumerator is no block is given" do
-    enum = Matrix.build(2, 1)
-    enum.should be_an_instance_of(Enumerator)
-    enum.each{1}.should == Matrix[[1], [1]]
-  end
-
-  it "requires integers as parameters" do
-    -> { Matrix.build("1", "2"){1} }.should raise_error(TypeError)
-    -> { Matrix.build(nil, nil){1} }.should raise_error(TypeError)
-    -> { Matrix.build(1..2){1} }.should raise_error(TypeError)
-  end
-
-  it "requires non-negative integers" do
-    -> { Matrix.build(-1, 1){1} }.should raise_error(ArgumentError)
-    -> { Matrix.build(+1,-1){1} }.should raise_error(ArgumentError)
-  end
-
-  it "returns empty Matrix if one argument is zero" do
-    m = Matrix.build(0, 3){
-      raise "Should not yield"
-    }
-    m.should be_empty
-    m.column_size.should == 3
-
-    m = Matrix.build(3, 0){
-      raise "Should not yield"
-    }
-    m.should be_empty
-    m.row_size.should == 3
-  end
-
-  it "tries to calls :to_int on arguments" do
-    int = mock('int')
-    int.should_receive(:to_int).twice.and_return(2)
-    Matrix.build(int, int){ 1 }.should == Matrix[ [1,1], [1,1] ]
-  end
-
-  it "builds an nxn Matrix when given only one argument" do
-    m = Matrix.build(3){1}
-    m.row_size.should == 3
-    m.column_size.should == 3
-  end
-end
-
-describe "for a subclass of Matrix" do
-  it "returns an instance of that subclass" do
-    MatrixSub.build(3){1}.should be_an_instance_of(MatrixSub)
   end
 end

spec/ruby/library/matrix/clone_spec.rb

@@ -1,25 +1,28 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#clone" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'fixtures/classes'
-    @a = Matrix[[1, 2], [3, 4], [5, 6]]
+  require 'matrix'
-  end
 
-  it "returns a shallow copy of the matrix" do
+  describe "Matrix#clone" do
-    b = @a.clone
+    before :each do
-    @a.should_not equal(b)
+      @a = Matrix[[1, 2], [3, 4], [5, 6]]
-    b.should be_kind_of(Matrix)
-    b.should == @a
-    0.upto(@a.row_size - 1) do |i|
-      @a.row(i).should_not equal(b.row(i))
     end
-  end
 
-  describe "for a subclass of Matrix" do
+    it "returns a shallow copy of the matrix" do
-    it "returns an instance of that subclass" do
+      b = @a.clone
-      MatrixSub.ins.clone.should be_an_instance_of(MatrixSub)
+      @a.should_not equal(b)
+      b.should be_kind_of(Matrix)
+      b.should == @a
+      0.upto(@a.row_size - 1) do |i|
+        @a.row(i).should_not equal(b.row(i))
+      end
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.ins.clone.should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/coerce_spec.rb

@@ -1,8 +1,11 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#coerce" do
+ruby_version_is ""..."3.1" do
-  it "allows the division of integer by a Matrix " do
+  require 'matrix'
-    (1/Matrix[[0,1],[-1,0]]).should == Matrix[[0,-1],[1,0]]
+
+  describe "Matrix#coerce" do
+    it "allows the division of integer by a Matrix " do
+      (1/Matrix[[0,1],[-1,0]]).should == Matrix[[0,-1],[1,0]]
+    end
   end
 end

spec/ruby/library/matrix/collect_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/collect'
 
-describe "Matrix#collect" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :collect, :collect
+  require_relative 'shared/collect'
+
+  describe "Matrix#collect" do
+    it_behaves_like :collect, :collect
+  end
 end

spec/ruby/library/matrix/column_size_spec.rb

@@ -1,13 +1,16 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#column_size" do
+ruby_version_is ""..."3.1" do
-  it "returns the number of columns" do
+  require 'matrix'
-    Matrix[ [1,2], [3,4] ].column_size.should == 2
-  end
 
-  it "returns 0 for empty matrices" do
+  describe "Matrix#column_size" do
-    Matrix[ [], [] ].column_size.should == 0
+    it "returns the number of columns" do
-    Matrix[ ].column_size.should == 0
+      Matrix[ [1,2], [3,4] ].column_size.should == 2
+    end
+
+    it "returns 0 for empty matrices" do
+      Matrix[ [], [] ].column_size.should == 0
+      Matrix[ ].column_size.should == 0
+    end
   end
 end

spec/ruby/library/matrix/column_spec.rb

@@ -1,35 +1,38 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#column" do
+ruby_version_is ""..."3.1" do
-  before :all do
+  require 'matrix'
-    @m =  Matrix[[1,2,3], [2,3,4]]
-  end
 
-  it "returns a Vector when called without a block" do
+  describe "Matrix#column" do
-    @m.column(1).should == Vector[2,3]
+    before :all do
-  end
+      @m =  Matrix[[1,2,3], [2,3,4]]
+    end
 
-  it "yields each element in the column to the block" do
+    it "returns a Vector when called without a block" do
-    a = []
+      @m.column(1).should == Vector[2,3]
-    @m.column(1) {|n| a << n }
+    end
-    a.should == [2,3]
-  end
 
-  it "counts backwards for negative argument" do
+    it "yields each element in the column to the block" do
-    @m.column(-1).should == Vector[3, 4]
+      a = []
-  end
+      @m.column(1) {|n| a << n }
+      a.should == [2,3]
+    end
 
-  it "returns self when called with a block" do
+    it "counts backwards for negative argument" do
-    @m.column(0) { |x| x }.should equal(@m)
+      @m.column(-1).should == Vector[3, 4]
-  end
+    end
 
-  it "returns nil when out of bounds" do
+    it "returns self when called with a block" do
-    @m.column(3).should == nil
+      @m.column(0) { |x| x }.should equal(@m)
-  end
+    end
 
-  it "never yields when out of bounds" do
+    it "returns nil when out of bounds" do
-    -> { @m.column(3){ raise } }.should_not raise_error
+      @m.column(3).should == nil
-    -> { @m.column(-4){ raise } }.should_not raise_error
+    end
+
+    it "never yields when out of bounds" do
+      -> { @m.column(3){ raise } }.should_not raise_error
+      -> { @m.column(-4){ raise } }.should_not raise_error
+    end
   end
 end

spec/ruby/library/matrix/column_vector_spec.rb

@@ -1,25 +1,28 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix.column_vector" do
+ruby_version_is ""..."3.1" do
+  require_relative 'fixtures/classes'
+  require 'matrix'
 
-  it "returns a single column Matrix when called with an Array" do
+  describe "Matrix.column_vector" do
-    m = Matrix.column_vector([4,5,6])
-    m.should be_an_instance_of(Matrix)
-    m.should == Matrix[ [4],[5],[6] ]
-  end
 
-  it "returns an empty Matrix when called with an empty Array" do
+    it "returns a single column Matrix when called with an Array" do
-    m = Matrix.column_vector([])
+      m = Matrix.column_vector([4,5,6])
-    m.should be_an_instance_of(Matrix)
+      m.should be_an_instance_of(Matrix)
-    m.row_size.should == 0
+      m.should == Matrix[ [4],[5],[6] ]
-    m.column_size.should == 1
+    end
-  end
 
-  describe "for a subclass of Matrix" do
+    it "returns an empty Matrix when called with an empty Array" do
-    it "returns an instance of that subclass" do
+      m = Matrix.column_vector([])
-      MatrixSub.column_vector([4,5,6]).should be_an_instance_of(MatrixSub)
+      m.should be_an_instance_of(Matrix)
+      m.row_size.should == 0
+      m.column_size.should == 1
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.column_vector([4,5,6]).should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/column_vectors_spec.rb

@@ -1,26 +1,29 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#column_vectors" do
+ruby_version_is ""..."3.1" do
+  require 'matrix'
+
+  describe "Matrix#column_vectors" do
+
+    before :each do
+      @vectors = Matrix[ [1,2], [3,4] ].column_vectors
+    end
+
+    it "returns an Array" do
+      Matrix[ [1,2], [3,4] ].column_vectors.should be_an_instance_of(Array)
+    end
+
+    it "returns an Array of Vectors" do
+      @vectors.all? {|v| v.should be_an_instance_of(Vector)}
+    end
+
+    it "returns each column as a Vector" do
+      @vectors.should == [Vector[1,3], Vector[2,4]]
+    end
+
+    it "returns an empty Array for empty matrices" do
+      Matrix[ [] ].column_vectors.should == []
+    end
 
-  before :each do
-    @vectors = Matrix[ [1,2], [3,4] ].column_vectors
   end
-
-  it "returns an Array" do
-    Matrix[ [1,2], [3,4] ].column_vectors.should be_an_instance_of(Array)
-  end
-
-  it "returns an Array of Vectors" do
-    @vectors.all? {|v| v.should be_an_instance_of(Vector)}
-  end
-
-  it "returns each column as a Vector" do
-    @vectors.should == [Vector[1,3], Vector[2,4]]
-  end
-
-  it "returns an empty Array for empty matrices" do
-    Matrix[ [] ].column_vectors.should == []
-  end
-
 end

spec/ruby/library/matrix/columns_spec.rb

@@ -1,42 +1,45 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix.columns" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'fixtures/classes'
-    @a = [1, 2]
+  require 'matrix'
-    @b = [3, 4]
-    @m = Matrix.columns([@a, @b])
-  end
 
-  it "creates a Matrix from argument columns" do
+  describe "Matrix.columns" do
-    @m.should be_an_instance_of(Matrix)
+    before :each do
-    @m.column(0).to_a.should == @a
+      @a = [1, 2]
-    @m.column(1).to_a.should == @b
+      @b = [3, 4]
-  end
+      @m = Matrix.columns([@a, @b])
+    end
 
-  it "accepts Vectors as argument columns" do
+    it "creates a Matrix from argument columns" do
-    m = Matrix.columns([Vector[*@a], Vector[*@b]])
+      @m.should be_an_instance_of(Matrix)
-    m.should == @m
+      @m.column(0).to_a.should == @a
-    m.column(0).to_a.should == @a
+      @m.column(1).to_a.should == @b
-    m.column(1).to_a.should == @b
+    end
-  end
 
-  it "handles empty matrices" do
+    it "accepts Vectors as argument columns" do
-    e = Matrix.columns([])
+      m = Matrix.columns([Vector[*@a], Vector[*@b]])
-    e.row_size.should == 0
+      m.should == @m
-    e.column_size.should == 0
+      m.column(0).to_a.should == @a
-    e.should == Matrix[]
+      m.column(1).to_a.should == @b
+    end
 
-    v = Matrix.columns([[],[],[]])
+    it "handles empty matrices" do
-    v.row_size.should == 0
+      e = Matrix.columns([])
-    v.column_size.should == 3
+      e.row_size.should == 0
-    v.should == Matrix[[], [], []].transpose
+      e.column_size.should == 0
-  end
+      e.should == Matrix[]
 
-  describe "for a subclass of Matrix" do
+      v = Matrix.columns([[],[],[]])
-    it "returns an instance of that subclass" do
+      v.row_size.should == 0
-      MatrixSub.columns([[1]]).should be_an_instance_of(MatrixSub)
+      v.column_size.should == 3
+      v.should == Matrix[[], [], []].transpose
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.columns([[1]]).should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/conj_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/conjugate'
 
-describe "Matrix#conj" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_conjugate, :conj
+  require_relative 'shared/conjugate'
+
+  describe "Matrix#conj" do
+    it_behaves_like :matrix_conjugate, :conj
+  end
 end

spec/ruby/library/matrix/conjugate_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/conjugate'
 
-describe "Matrix#conjugate" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_conjugate, :conjugate
+  require_relative 'shared/conjugate'
+
+  describe "Matrix#conjugate" do
+    it_behaves_like :matrix_conjugate, :conjugate
+  end
 end

spec/ruby/library/matrix/constructor_spec.rb

@@ -1,65 +1,68 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix.[]" do
+ruby_version_is ""..."3.1" do
+  require_relative 'fixtures/classes'
+  require 'matrix'
 
-  it "requires arrays as parameters" do
+  describe "Matrix.[]" do
-    -> { Matrix[5] }.should raise_error(TypeError)
-    -> { Matrix[nil] }.should raise_error(TypeError)
-    -> { Matrix[1..2] }.should raise_error(TypeError)
-    -> { Matrix[[1, 2], 3] }.should raise_error(TypeError)
-  end
 
-  it "creates an empty Matrix with no arguments" do
+    it "requires arrays as parameters" do
-    m = Matrix[]
+      -> { Matrix[5] }.should raise_error(TypeError)
-    m.column_size.should == 0
+      -> { Matrix[nil] }.should raise_error(TypeError)
-    m.row_size.should == 0
+      -> { Matrix[1..2] }.should raise_error(TypeError)
-  end
+      -> { Matrix[[1, 2], 3] }.should raise_error(TypeError)
+    end
 
-  it "raises for non-rectangular matrices" do
+    it "creates an empty Matrix with no arguments" do
-    ->{ Matrix[ [0], [0,1] ] }.should \
+      m = Matrix[]
-      raise_error(Matrix::ErrDimensionMismatch)
+      m.column_size.should == 0
-    ->{ Matrix[ [0,1], [0,1,2], [0,1] ]}.should \
+      m.row_size.should == 0
-      raise_error(Matrix::ErrDimensionMismatch)
+    end
-  end
 
-  it "accepts vector arguments" do
+    it "raises for non-rectangular matrices" do
-    a = Matrix[Vector[1, 2], Vector[3, 4]]
+      ->{ Matrix[ [0], [0,1] ] }.should \
-    a.should be_an_instance_of(Matrix)
+        raise_error(Matrix::ErrDimensionMismatch)
-    a.should == Matrix[ [1, 2], [3, 4] ]
+      ->{ Matrix[ [0,1], [0,1,2], [0,1] ]}.should \
-  end
+        raise_error(Matrix::ErrDimensionMismatch)
+    end
 
-  it "tries to calls :to_ary on arguments" do
+    it "accepts vector arguments" do
-    array = mock('ary')
+      a = Matrix[Vector[1, 2], Vector[3, 4]]
-    array.should_receive(:to_ary).and_return([1,2])
+      a.should be_an_instance_of(Matrix)
-    Matrix[array, [3,4] ].should == Matrix[ [1,2], [3,4] ]
+      a.should == Matrix[ [1, 2], [3, 4] ]
-  end
+    end
+
+    it "tries to calls :to_ary on arguments" do
+      array = mock('ary')
+      array.should_receive(:to_ary).and_return([1,2])
+      Matrix[array, [3,4] ].should == Matrix[ [1,2], [3,4] ]
+    end
 
 
-  it "returns a Matrix object" do
+    it "returns a Matrix object" do
-    Matrix[ [1] ].should be_an_instance_of(Matrix)
+      Matrix[ [1] ].should be_an_instance_of(Matrix)
-  end
+    end
 
-  it "can create an nxn Matrix" do
+    it "can create an nxn Matrix" do
-    m = Matrix[ [20,30], [40.5, 9] ]
+      m = Matrix[ [20,30], [40.5, 9] ]
-    m.row_size.should == 2
+      m.row_size.should == 2
-    m.column_size.should == 2
+      m.column_size.should == 2
-    m.column(0).should == Vector[20, 40.5]
+      m.column(0).should == Vector[20, 40.5]
-    m.column(1).should == Vector[30, 9]
+      m.column(1).should == Vector[30, 9]
-    m.row(0).should == Vector[20, 30]
+      m.row(0).should == Vector[20, 30]
-    m.row(1).should == Vector[40.5, 9]
+      m.row(1).should == Vector[40.5, 9]
-  end
+    end
 
-  it "can create a 0xn Matrix" do
+    it "can create a 0xn Matrix" do
-    m = Matrix[ [], [], [] ]
+      m = Matrix[ [], [], [] ]
-    m.row_size.should == 3
+      m.row_size.should == 3
-    m.column_size.should == 0
+      m.column_size.should == 0
-  end
+    end
 
-  describe "for a subclass of Matrix" do
+    describe "for a subclass of Matrix" do
-    it "returns an instance of that subclass" do
+      it "returns an instance of that subclass" do
-      MatrixSub[ [20,30], [40.5, 9] ].should be_an_instance_of(MatrixSub)
+        MatrixSub[ [20,30], [40.5, 9] ].should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/det_spec.rb

@@ -1,7 +1,10 @@
 require_relative '../../spec_helper'
-require_relative 'shared/determinant'
-require 'matrix'
 
-describe "Matrix#det" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :determinant, :det
+  require_relative 'shared/determinant'
+  require 'matrix'
+
+  describe "Matrix#det" do
+    it_behaves_like :determinant, :det
+  end
 end

spec/ruby/library/matrix/determinant_spec.rb

@@ -1,7 +1,10 @@
 require_relative '../../spec_helper'
-require_relative 'shared/determinant'
-require 'matrix'
 
-describe "Matrix#determinant" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :determinant, :determinant
+  require_relative 'shared/determinant'
+  require 'matrix'
+
+  describe "Matrix#determinant" do
+    it_behaves_like :determinant, :determinant
+  end
 end

spec/ruby/library/matrix/diagonal_spec.rb

@@ -1,72 +1,75 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix.diagonal" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'fixtures/classes'
-    @m = Matrix.diagonal(10, 11, 12, 13, 14)
+  require 'matrix'
-  end
 
-  it "returns an object of type Matrix" do
+  describe "Matrix.diagonal" do
-    @m.should be_kind_of(Matrix)
+    before :each do
-  end
+      @m = Matrix.diagonal(10, 11, 12, 13, 14)
-
-  it "returns a square Matrix of the right size" do
-    @m.column_size.should == 5
-    @m.row_size.should == 5
-  end
-
-  it "sets the diagonal to the arguments" do
-    (0..4).each do |i|
-      @m[i, i].should == i + 10
     end
-  end
 
-  it "fills all non-diagonal cells with 0" do
+    it "returns an object of type Matrix" do
-    (0..4).each do |i|
+      @m.should be_kind_of(Matrix)
-      (0..4).each do |j|
+    end
-        if i != j
+
-          @m[i, j].should == 0
+    it "returns a square Matrix of the right size" do
+      @m.column_size.should == 5
+      @m.row_size.should == 5
+    end
+
+    it "sets the diagonal to the arguments" do
+      (0..4).each do |i|
+        @m[i, i].should == i + 10
+      end
+    end
+
+    it "fills all non-diagonal cells with 0" do
+      (0..4).each do |i|
+        (0..4).each do |j|
+          if i != j
+            @m[i, j].should == 0
+          end
         end
       end
     end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.diagonal(1).should be_an_instance_of(MatrixSub)
+      end
+    end
   end
 
-  describe "for a subclass of Matrix" do
+  describe "Matrix.diagonal?" do
-    it "returns an instance of that subclass" do
+    it "returns true for a diagonal Matrix" do
-      MatrixSub.diagonal(1).should be_an_instance_of(MatrixSub)
+      Matrix.diagonal([1, 2, 3]).diagonal?.should be_true
-    end
+    end
-  end
+
-end
+    it "returns true for a zero square Matrix" do
-
+      Matrix.zero(3).diagonal?.should be_true
-describe "Matrix.diagonal?" do
+    end
-  it "returns true for a diagonal Matrix" do
+
-    Matrix.diagonal([1, 2, 3]).diagonal?.should be_true
+    it "returns false for a non diagonal square Matrix" do
-  end
+      Matrix[[0, 1], [0, 0]].diagonal?.should be_false
-
+      Matrix[[1, 2, 3], [1, 2, 3], [1, 2, 3]].diagonal?.should be_false
-  it "returns true for a zero square Matrix" do
+    end
-    Matrix.zero(3).diagonal?.should be_true
+
-  end
+    it "returns true for an empty 0x0 matrix" do
-
+      Matrix.empty(0,0).diagonal?.should be_true
-  it "returns false for a non diagonal square Matrix" do
+    end
-    Matrix[[0, 1], [0, 0]].diagonal?.should be_false
+
-    Matrix[[1, 2, 3], [1, 2, 3], [1, 2, 3]].diagonal?.should be_false
+    it "raises an error for rectangular matrices" do
-  end
+      [
-
+        Matrix[[0], [0]],
-  it "returns true for an empty 0x0 matrix" do
+        Matrix[[0, 0]],
-    Matrix.empty(0,0).diagonal?.should be_true
+        Matrix.empty(0, 2),
-  end
+        Matrix.empty(2, 0),
-
+      ].each do |rectangular_matrix|
-  it "raises an error for rectangular matrices" do
+        -> {
-    [
+          rectangular_matrix.diagonal?
-      Matrix[[0], [0]],
+        }.should raise_error(Matrix::ErrDimensionMismatch)
-      Matrix[[0, 0]],
+      end
-      Matrix.empty(0, 2),
-      Matrix.empty(2, 0),
-    ].each do |rectangular_matrix|
-      -> {
-        rectangular_matrix.diagonal?
-      }.should raise_error(Matrix::ErrDimensionMismatch)
     end
   end
 end

spec/ruby/library/matrix/divide_spec.rb

@@ -1,54 +1,57 @@
 require_relative '../../spec_helper'
-require_relative 'spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#/" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'spec_helper'
-    @a = Matrix[ [1, 2], [3, 4] ]
+  require_relative 'fixtures/classes'
-    @b = Matrix[ [4, 5], [6, 7] ]
+  require 'matrix'
-    @c = Matrix[ [1.2, 2.4], [3.6, 4.8] ]
-  end
 
-  it "returns the result of dividing self by another Matrix" do
+  describe "Matrix#/" do
-    (@a / @b).should be_close_to_matrix([[2.5, -1.5], [1.5, -0.5]])
+    before :each do
-  end
+      @a = Matrix[ [1, 2], [3, 4] ]
-
+      @b = Matrix[ [4, 5], [6, 7] ]
-  # Guard against the Mathn library
+      @c = Matrix[ [1.2, 2.4], [3.6, 4.8] ]
-  guard -> { !defined?(Math.rsqrt) } do
-    it "returns the result of dividing self by a Fixnum" do
-      (@a / 2).should == Matrix[ [0, 1], [1, 2] ]
     end
 
-    it "returns the result of dividing self by a Bignum" do
+    it "returns the result of dividing self by another Matrix" do
-      (@a / bignum_value).should == Matrix[ [0, 0], [0, 0] ]
+      (@a / @b).should be_close_to_matrix([[2.5, -1.5], [1.5, -0.5]])
     end
-  end
 
-  it "returns the result of dividing self by a Float" do
+    # Guard against the Mathn library
-    (@c / 1.2).should == Matrix[ [1, 2], [3, 4] ]
+    guard -> { !defined?(Math.rsqrt) } do
-  end
+      it "returns the result of dividing self by a Fixnum" do
+        (@a / 2).should == Matrix[ [0, 1], [1, 2] ]
+      end
 
-  it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
+      it "returns the result of dividing self by a Bignum" do
-    -> { @a / Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
+        (@a / bignum_value).should == Matrix[ [0, 0], [0, 0] ]
-  end
+      end
-
-  it "returns an instance of Matrix" do
-    (@a / @b).should be_kind_of(Matrix)
-  end
-
-  describe "for a subclass of Matrix" do
-    it "returns an instance of that subclass" do
-      m = MatrixSub.ins
-      (m/m).should be_an_instance_of(MatrixSub)
-      (m/1).should be_an_instance_of(MatrixSub)
     end
-  end
 
-  it "raises a TypeError if other is of wrong type" do
+    it "returns the result of dividing self by a Float" do
-    -> { @a / nil        }.should raise_error(TypeError)
+      (@c / 1.2).should == Matrix[ [1, 2], [3, 4] ]
-    -> { @a / "a"        }.should raise_error(TypeError)
+    end
-    -> { @a / [ [1, 2] ] }.should raise_error(TypeError)
+
-    -> { @a / Object.new }.should raise_error(TypeError)
+    it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
+      -> { @a / Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
+    end
+
+    it "returns an instance of Matrix" do
+      (@a / @b).should be_kind_of(Matrix)
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        m = MatrixSub.ins
+        (m/m).should be_an_instance_of(MatrixSub)
+        (m/1).should be_an_instance_of(MatrixSub)
+      end
+    end
+
+    it "raises a TypeError if other is of wrong type" do
+      -> { @a / nil        }.should raise_error(TypeError)
+      -> { @a / "a"        }.should raise_error(TypeError)
+      -> { @a / [ [1, 2] ] }.should raise_error(TypeError)
+      -> { @a / Object.new }.should raise_error(TypeError)
+    end
   end
 end

spec/ruby/library/matrix/each_spec.rb

@@ -1,74 +1,77 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#each" do
+ruby_version_is ""..."3.1" do
-  before :all do
+  require 'matrix'
-    @m = Matrix[ [1, 2, 3], [4, 5, 6] ]
+
-    @result = (1..6).to_a
+  describe "Matrix#each" do
+    before :all do
+      @m = Matrix[ [1, 2, 3], [4, 5, 6] ]
+      @result = (1..6).to_a
+    end
+
+    it "returns an Enumerator when called without a block" do
+      enum = @m.each
+      enum.should be_an_instance_of(Enumerator)
+      enum.to_a.should == @result
+    end
+
+    it "returns self" do
+      @m.each{}.should equal(@m)
+    end
+
+    it "yields the elements starting with the those of the first row" do
+      a = []
+      @m.each {|x| a << x}
+      a.should ==  @result
+    end
   end
 
-  it "returns an Enumerator when called without a block" do
+  describe "Matrix#each with an argument" do
-    enum = @m.each
+    before :all do
-    enum.should be_an_instance_of(Enumerator)
+      @m = Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ]
-    enum.to_a.should == @result
+      @t = Matrix[ [1, 2], [3, 4], [5, 6], [7, 8] ]
-  end
+    end
 
-  it "returns self" do
+    it "raises an ArgumentError for unrecognized argument" do
-    @m.each{}.should equal(@m)
+      -> {
-  end
+        @m.each("all"){}
+      }.should raise_error(ArgumentError)
+      -> {
+        @m.each(nil){}
+      }.should raise_error(ArgumentError)
+      -> {
+        @m.each(:left){}
+      }.should raise_error(ArgumentError)
+    end
 
-  it "yields the elements starting with the those of the first row" do
+    it "yields the rights elements when passed :diagonal" do
-    a = []
+      @m.each(:diagonal).to_a.should == [1, 6]
-    @m.each {|x| a << x}
+      @t.each(:diagonal).to_a.should == [1, 4]
-    a.should ==  @result
+    end
-  end
+
-end
+    it "yields the rights elements when passed :off_diagonal" do
-
+      @m.each(:off_diagonal).to_a.should == [2, 3, 4, 5, 7, 8]
-describe "Matrix#each with an argument" do
+      @t.each(:off_diagonal).to_a.should == [2, 3, 5, 6, 7, 8]
-  before :all do
+    end
-    @m = Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ]
+
-    @t = Matrix[ [1, 2], [3, 4], [5, 6], [7, 8] ]
+    it "yields the rights elements when passed :lower" do
-  end
+      @m.each(:lower).to_a.should == [1, 5, 6]
-
+      @t.each(:lower).to_a.should == [1, 3, 4, 5, 6, 7, 8]
-  it "raises an ArgumentError for unrecognized argument" do
+    end
-    -> {
+
-      @m.each("all"){}
+    it "yields the rights elements when passed :strict_lower" do
-    }.should raise_error(ArgumentError)
+      @m.each(:strict_lower).to_a.should == [5]
-    -> {
+      @t.each(:strict_lower).to_a.should == [3, 5, 6, 7, 8]
-      @m.each(nil){}
+    end
-    }.should raise_error(ArgumentError)
+
-    -> {
+    it "yields the rights elements when passed :strict_upper" do
-      @m.each(:left){}
+      @m.each(:strict_upper).to_a.should == [2, 3, 4, 7, 8]
-    }.should raise_error(ArgumentError)
+      @t.each(:strict_upper).to_a.should == [2]
-  end
+    end
-
+
-  it "yields the rights elements when passed :diagonal" do
+    it "yields the rights elements when passed :upper" do
-    @m.each(:diagonal).to_a.should == [1, 6]
+      @m.each(:upper).to_a.should == [1, 2, 3, 4, 6, 7, 8]
-    @t.each(:diagonal).to_a.should == [1, 4]
+      @t.each(:upper).to_a.should == [1, 2, 4]
-  end
+    end
-
-  it "yields the rights elements when passed :off_diagonal" do
-    @m.each(:off_diagonal).to_a.should == [2, 3, 4, 5, 7, 8]
-    @t.each(:off_diagonal).to_a.should == [2, 3, 5, 6, 7, 8]
-  end
-
-  it "yields the rights elements when passed :lower" do
-    @m.each(:lower).to_a.should == [1, 5, 6]
-    @t.each(:lower).to_a.should == [1, 3, 4, 5, 6, 7, 8]
-  end
-
-  it "yields the rights elements when passed :strict_lower" do
-    @m.each(:strict_lower).to_a.should == [5]
-    @t.each(:strict_lower).to_a.should == [3, 5, 6, 7, 8]
-  end
-
-  it "yields the rights elements when passed :strict_upper" do
-    @m.each(:strict_upper).to_a.should == [2, 3, 4, 7, 8]
-    @t.each(:strict_upper).to_a.should == [2]
-  end
-
-  it "yields the rights elements when passed :upper" do
-    @m.each(:upper).to_a.should == [1, 2, 3, 4, 6, 7, 8]
-    @t.each(:upper).to_a.should == [1, 2, 4]
   end
 end

spec/ruby/library/matrix/each_with_index_spec.rb

@@ -1,81 +1,84 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#each_with_index" do
+ruby_version_is ""..."3.1" do
-  before :all do
+  require 'matrix'
-    @m = Matrix[ [1, 2, 3], [4, 5, 6] ]
+
-    @result = [
+  describe "Matrix#each_with_index" do
-      [1, 0, 0],
+    before :all do
-      [2, 0, 1],
+      @m = Matrix[ [1, 2, 3], [4, 5, 6] ]
-      [3, 0, 2],
+      @result = [
-      [4, 1, 0],
+        [1, 0, 0],
-      [5, 1, 1],
+        [2, 0, 1],
-      [6, 1, 2]
+        [3, 0, 2],
-    ]
+        [4, 1, 0],
+        [5, 1, 1],
+        [6, 1, 2]
+      ]
+    end
+
+    it "returns an Enumerator when called without a block" do
+      enum = @m.each_with_index
+      enum.should be_an_instance_of(Enumerator)
+      enum.to_a.should == @result
+    end
+
+    it "returns self" do
+      @m.each_with_index{}.should equal(@m)
+    end
+
+    it "yields the elements starting with the those of the first row" do
+      a = []
+      @m.each_with_index {|x, r, c| a << [x, r, c]}
+      a.should == @result
+    end
   end
 
-  it "returns an Enumerator when called without a block" do
+  describe "Matrix#each_with_index with an argument" do
-    enum = @m.each_with_index
+    before :all do
-    enum.should be_an_instance_of(Enumerator)
+      @m = Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ]
-    enum.to_a.should == @result
+      @t = Matrix[ [1, 2], [3, 4], [5, 6], [7, 8] ]
-  end
+    end
 
-  it "returns self" do
+    it "raises an ArgumentError for unrecognized argument" do
-    @m.each_with_index{}.should equal(@m)
+      -> {
-  end
+        @m.each_with_index("all"){}
+      }.should raise_error(ArgumentError)
+      -> {
+        @m.each_with_index(nil){}
+      }.should raise_error(ArgumentError)
+      -> {
+        @m.each_with_index(:left){}
+      }.should raise_error(ArgumentError)
+    end
 
-  it "yields the elements starting with the those of the first row" do
+    it "yields the rights elements when passed :diagonal" do
-    a = []
+      @m.each_with_index(:diagonal).to_a.should == [[1, 0, 0], [6, 1, 1]]
-    @m.each_with_index {|x, r, c| a << [x, r, c]}
+      @t.each_with_index(:diagonal).to_a.should == [[1, 0, 0], [4, 1, 1]]
-    a.should == @result
+    end
-  end
+
-end
+    it "yields the rights elements when passed :off_diagonal" do
-
+      @m.each_with_index(:off_diagonal).to_a.should == [[2, 0, 1], [3, 0, 2], [4, 0, 3], [5, 1, 0], [7, 1, 2], [8, 1, 3]]
-describe "Matrix#each_with_index with an argument" do
+      @t.each_with_index(:off_diagonal).to_a.should == [[2, 0, 1], [3, 1, 0], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
-  before :all do
+    end
-    @m = Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ]
+
-    @t = Matrix[ [1, 2], [3, 4], [5, 6], [7, 8] ]
+    it "yields the rights elements when passed :lower" do
-  end
+      @m.each_with_index(:lower).to_a.should == [[1, 0, 0], [5, 1, 0], [6, 1, 1]]
-
+      @t.each_with_index(:lower).to_a.should == [[1, 0, 0], [3, 1, 0], [4, 1, 1], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
-  it "raises an ArgumentError for unrecognized argument" do
+    end
-    -> {
+
-      @m.each_with_index("all"){}
+    it "yields the rights elements when passed :strict_lower" do
-    }.should raise_error(ArgumentError)
+      @m.each_with_index(:strict_lower).to_a.should == [[5, 1, 0]]
-    -> {
+      @t.each_with_index(:strict_lower).to_a.should == [[3, 1, 0], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
-      @m.each_with_index(nil){}
+    end
-    }.should raise_error(ArgumentError)
+
-    -> {
+    it "yields the rights elements when passed :strict_upper" do
-      @m.each_with_index(:left){}
+      @m.each_with_index(:strict_upper).to_a.should == [[2, 0, 1], [3, 0, 2], [4, 0, 3], [7, 1, 2], [8, 1, 3]]
-    }.should raise_error(ArgumentError)
+      @t.each_with_index(:strict_upper).to_a.should == [[2, 0, 1]]
-  end
+    end
-
+
-  it "yields the rights elements when passed :diagonal" do
+    it "yields the rights elements when passed :upper" do
-    @m.each_with_index(:diagonal).to_a.should == [[1, 0, 0], [6, 1, 1]]
+      @m.each_with_index(:upper).to_a.should == [[1, 0, 0], [2, 0, 1], [3, 0, 2], [4, 0, 3], [6, 1, 1], [7, 1, 2], [8, 1, 3]]
-    @t.each_with_index(:diagonal).to_a.should == [[1, 0, 0], [4, 1, 1]]
+      @t.each_with_index(:upper).to_a.should == [[1, 0, 0], [2, 0, 1], [4, 1, 1]]
-  end
+    end
-
-  it "yields the rights elements when passed :off_diagonal" do
-    @m.each_with_index(:off_diagonal).to_a.should == [[2, 0, 1], [3, 0, 2], [4, 0, 3], [5, 1, 0], [7, 1, 2], [8, 1, 3]]
-    @t.each_with_index(:off_diagonal).to_a.should == [[2, 0, 1], [3, 1, 0], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
-  end
-
-  it "yields the rights elements when passed :lower" do
-    @m.each_with_index(:lower).to_a.should == [[1, 0, 0], [5, 1, 0], [6, 1, 1]]
-    @t.each_with_index(:lower).to_a.should == [[1, 0, 0], [3, 1, 0], [4, 1, 1], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
-  end
-
-  it "yields the rights elements when passed :strict_lower" do
-    @m.each_with_index(:strict_lower).to_a.should == [[5, 1, 0]]
-    @t.each_with_index(:strict_lower).to_a.should == [[3, 1, 0], [5, 2, 0], [6, 2, 1], [7, 3, 0], [8, 3, 1]]
-  end
-
-  it "yields the rights elements when passed :strict_upper" do
-    @m.each_with_index(:strict_upper).to_a.should == [[2, 0, 1], [3, 0, 2], [4, 0, 3], [7, 1, 2], [8, 1, 3]]
-    @t.each_with_index(:strict_upper).to_a.should == [[2, 0, 1]]
-  end
-
-  it "yields the rights elements when passed :upper" do
-    @m.each_with_index(:upper).to_a.should == [[1, 0, 0], [2, 0, 1], [3, 0, 2], [4, 0, 3], [6, 1, 1], [7, 1, 2], [8, 1, 3]]
-    @t.each_with_index(:upper).to_a.should == [[1, 0, 0], [2, 0, 1], [4, 1, 1]]
   end
 end

spec/ruby/library/matrix/eigenvalue_decomposition/eigenvalue_matrix_spec.rb

@@ -1,9 +1,12 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::EigenvalueDecomposition#eigenvalue_matrix" do
+ruby_version_is ""..."3.1" do
-  it "returns a diagonal matrix with the eigenvalues on the diagonal" do
+  require 'matrix'
-    Matrix[[14, 16], [-6, -6]].eigensystem.eigenvalue_matrix.should == Matrix[[6, 0],[0, 2]]
+
-    Matrix[[1, 1], [-1, 1]].eigensystem.eigenvalue_matrix.should == Matrix[[Complex(1,1), 0],[0, Complex(1,-1)]]
+  describe "Matrix::EigenvalueDecomposition#eigenvalue_matrix" do
+    it "returns a diagonal matrix with the eigenvalues on the diagonal" do
+      Matrix[[14, 16], [-6, -6]].eigensystem.eigenvalue_matrix.should == Matrix[[6, 0],[0, 2]]
+      Matrix[[1, 1], [-1, 1]].eigensystem.eigenvalue_matrix.should == Matrix[[Complex(1,1), 0],[0, Complex(1,-1)]]
+    end
   end
 end

spec/ruby/library/matrix/eigenvalue_decomposition/eigenvalues_spec.rb

@@ -1,22 +1,25 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::EigenvalueDecomposition#eigenvalues" do
+ruby_version_is ""..."3.1" do
-  it "returns an array of complex eigenvalues for a rotation matrix" do
+  require 'matrix'
-    Matrix[[ 1, 1],
-           [-1, 1]].eigensystem.eigenvalues.sort_by{|v| v.imag}.should ==
-    [ Complex(1, -1), Complex(1, 1)]
-  end
 
-  it "returns an array of real eigenvalues for a symmetric matrix" do
+  describe "Matrix::EigenvalueDecomposition#eigenvalues" do
-    Matrix[[1, 2],
+    it "returns an array of complex eigenvalues for a rotation matrix" do
-           [2, 1]].eigensystem.eigenvalues.sort.map!{|x| x.round(10)}.should ==
+      Matrix[[ 1, 1],
-    [ -1, 3 ]
+             [-1, 1]].eigensystem.eigenvalues.sort_by{|v| v.imag}.should ==
-  end
+      [ Complex(1, -1), Complex(1, 1)]
+    end
 
-  it "returns an array of real eigenvalues for a matrix" do
+    it "returns an array of real eigenvalues for a symmetric matrix" do
-    Matrix[[14, 16],
+      Matrix[[1, 2],
-           [-6, -6]].eigensystem.eigenvalues.sort.map!{|x| x.round(10)}.should ==
+             [2, 1]].eigensystem.eigenvalues.sort.map!{|x| x.round(10)}.should ==
-    [ 2, 6 ]
+      [ -1, 3 ]
+    end
+
+    it "returns an array of real eigenvalues for a matrix" do
+      Matrix[[14, 16],
+             [-6, -6]].eigensystem.eigenvalues.sort.map!{|x| x.round(10)}.should ==
+      [ 2, 6 ]
+    end
   end
 end

spec/ruby/library/matrix/eigenvalue_decomposition/eigenvector_matrix_spec.rb

@@ -1,20 +1,23 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::EigenvalueDecomposition#eigenvector_matrix" do
+ruby_version_is ""..."3.1" do
-  it "returns a complex eigenvector matrix given a rotation matrix" do
+  require 'matrix'
-    # Fix me: should test for linearity, not for equality
-    Matrix[[ 1, 1],
-           [-1, 1]].eigensystem.eigenvector_matrix.should ==
-    Matrix[[1, 1],
-           [Complex(0, 1), Complex(0, -1)]]
-  end
 
-  it "returns an real eigenvector matrix for a symmetric matrix" do
+  describe "Matrix::EigenvalueDecomposition#eigenvector_matrix" do
-    # Fix me: should test for linearity, not for equality
+    it "returns a complex eigenvector matrix given a rotation matrix" do
-    Matrix[[1, 2],
+      # Fix me: should test for linearity, not for equality
-           [2, 1]].eigensystem.eigenvector_matrix.should ==
+      Matrix[[ 1, 1],
-    Matrix[[0.7071067811865475, 0.7071067811865475],
+             [-1, 1]].eigensystem.eigenvector_matrix.should ==
-           [-0.7071067811865475, 0.7071067811865475]]
+      Matrix[[1, 1],
+             [Complex(0, 1), Complex(0, -1)]]
+    end
+
+    it "returns an real eigenvector matrix for a symmetric matrix" do
+      # Fix me: should test for linearity, not for equality
+      Matrix[[1, 2],
+             [2, 1]].eigensystem.eigenvector_matrix.should ==
+      Matrix[[0.7071067811865475, 0.7071067811865475],
+             [-0.7071067811865475, 0.7071067811865475]]
+    end
   end
 end

spec/ruby/library/matrix/eigenvalue_decomposition/eigenvectors_spec.rb

@@ -1,22 +1,25 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::EigenvalueDecomposition#eigenvectors" do
+ruby_version_is ""..."3.1" do
-  it "returns an array of complex eigenvectors for a rotation matrix" do
+  require 'matrix'
-    # Fix me: should test for linearity, not for equality
-    Matrix[[ 1, 1],
-           [-1, 1]].eigensystem.eigenvectors.should ==
-    [ Vector[1, Complex(0, 1)],
-      Vector[1, Complex(0, -1)]
-    ]
-  end
 
-  it "returns an array of real eigenvectors for a symmetric matrix" do
+  describe "Matrix::EigenvalueDecomposition#eigenvectors" do
-    # Fix me: should test for linearity, not for equality
+    it "returns an array of complex eigenvectors for a rotation matrix" do
-    Matrix[[1, 2],
+      # Fix me: should test for linearity, not for equality
-           [2, 1]].eigensystem.eigenvectors.should ==
+      Matrix[[ 1, 1],
-    [ Vector[0.7071067811865475, -0.7071067811865475],
+             [-1, 1]].eigensystem.eigenvectors.should ==
-      Vector[0.7071067811865475, 0.7071067811865475]
+      [ Vector[1, Complex(0, 1)],
-    ]
+        Vector[1, Complex(0, -1)]
+      ]
+    end
+
+    it "returns an array of real eigenvectors for a symmetric matrix" do
+      # Fix me: should test for linearity, not for equality
+      Matrix[[1, 2],
+             [2, 1]].eigensystem.eigenvectors.should ==
+      [ Vector[0.7071067811865475, -0.7071067811865475],
+        Vector[0.7071067811865475, 0.7071067811865475]
+      ]
+    end
   end
 end

spec/ruby/library/matrix/eigenvalue_decomposition/initialize_spec.rb

@@ -1,24 +1,27 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::EigenvalueDecomposition#initialize" do
+ruby_version_is ""..."3.1" do
-  it "raises an error if argument is not a matrix" do
+  require 'matrix'
-    -> {
-      Matrix::EigenvalueDecomposition.new([[]])
-    }.should raise_error(TypeError)
-    -> {
-      Matrix::EigenvalueDecomposition.new(42)
-    }.should raise_error(TypeError)
-  end
 
-  it "raises an error if matrix is not square" do
+  describe "Matrix::EigenvalueDecomposition#initialize" do
-    -> {
+    it "raises an error if argument is not a matrix" do
-      Matrix::EigenvalueDecomposition.new(Matrix[[1, 2]])
+      -> {
-    }.should raise_error(Matrix::ErrDimensionMismatch)
+        Matrix::EigenvalueDecomposition.new([[]])
-  end
+      }.should raise_error(TypeError)
+      -> {
+        Matrix::EigenvalueDecomposition.new(42)
+      }.should raise_error(TypeError)
+    end
 
-  it "never hangs" do
+    it "raises an error if matrix is not square" do
-    m = Matrix[ [0,0,0,0,0], [0,0,0,0,1], [0,0,0,1,0], [1,1,0,0,1], [1,0,1,0,1] ]
+      -> {
-    Matrix::EigenvalueDecomposition.new(m).should_not == "infinite loop"
+        Matrix::EigenvalueDecomposition.new(Matrix[[1, 2]])
+      }.should raise_error(Matrix::ErrDimensionMismatch)
+    end
+
+    it "never hangs" do
+      m = Matrix[ [0,0,0,0,0], [0,0,0,0,1], [0,0,0,1,0], [1,1,0,0,1], [1,0,1,0,1] ]
+      Matrix::EigenvalueDecomposition.new(m).should_not == "infinite loop"
+    end
   end
 end

spec/ruby/library/matrix/eigenvalue_decomposition/to_a_spec.rb

@@ -1,18 +1,21 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::EigenvalueDecomposition#to_a" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require 'matrix'
-    @a = Matrix[[14, 16], [-6, -6]]
-    @e = Matrix::EigenvalueDecomposition.new(@a)
-  end
 
-  it "returns an array of with [V, D, V.inv]" do
+  describe "Matrix::EigenvalueDecomposition#to_a" do
-    @e.to_a.should == [@e.v, @e.d, @e.v_inv]
+    before :each do
-  end
+      @a = Matrix[[14, 16], [-6, -6]]
+      @e = Matrix::EigenvalueDecomposition.new(@a)
+    end
 
-  it "returns a factorization" do
+    it "returns an array of with [V, D, V.inv]" do
-    v, d, v_inv = @e.to_a
+      @e.to_a.should == [@e.v, @e.d, @e.v_inv]
-    (v * d * v_inv).map{|e| e.round(10)}.should == @a
+    end
+
+    it "returns a factorization" do
+      v, d, v_inv = @e.to_a
+      (v * d * v_inv).map{|e| e.round(10)}.should == @a
+    end
   end
 end

spec/ruby/library/matrix/element_reference_spec.rb

@@ -1,23 +1,26 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#[]" do
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  before :all do
+  describe "Matrix#[]" do
-    @m = Matrix[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
-  end
 
-  it "returns element at (i, j)" do
+    before :all do
-    (0..3).each do |i|
+      @m = Matrix[[0, 1, 2], [3, 4, 5], [6, 7, 8], [9, 10, 11]]
-      (0..2).each do |j|
+    end
-        @m[i, j].should == (i * 3) + j
+
+    it "returns element at (i, j)" do
+      (0..3).each do |i|
+        (0..2).each do |j|
+          @m[i, j].should == (i * 3) + j
+        end
       end
     end
-  end
 
-  it "returns nil for an invalid index pair" do
+    it "returns nil for an invalid index pair" do
-    @m[8,1].should be_nil
+      @m[8,1].should be_nil
-    @m[1,8].should be_nil
+      @m[1,8].should be_nil
-  end
+    end
 
+  end
 end

spec/ruby/library/matrix/empty_spec.rb

@@ -1,68 +1,71 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#empty?" do
+ruby_version_is ""..."3.1" do
-  it "returns true when the Matrix is empty" do
+  require_relative 'fixtures/classes'
-    Matrix[ ].empty?.should be_true
+  require 'matrix'
-    Matrix[ [], [], [] ].empty?.should be_true
+
-    Matrix[ [], [], [] ].transpose.empty?.should be_true
+  describe "Matrix#empty?" do
+    it "returns true when the Matrix is empty" do
+      Matrix[ ].empty?.should be_true
+      Matrix[ [], [], [] ].empty?.should be_true
+      Matrix[ [], [], [] ].transpose.empty?.should be_true
+    end
+
+    it "returns false when the Matrix has elements" do
+      Matrix[ [1, 2] ].empty?.should be_false
+      Matrix[ [1], [2] ].empty?.should be_false
+    end
+
+    it "doesn't accept any parameter" do
+      ->{
+        Matrix[ [1, 2] ].empty?(42)
+      }.should raise_error(ArgumentError)
+    end
   end
 
-  it "returns false when the Matrix has elements" do
+  describe "Matrix.empty" do
-    Matrix[ [1, 2] ].empty?.should be_false
+    it "returns an empty matrix of the requested size" do
-    Matrix[ [1], [2] ].empty?.should be_false
+      m = Matrix.empty(3, 0)
+      m.row_size.should == 3
+      m.column_size.should == 0
+
+      m = Matrix.empty(0, 3)
+      m.row_size.should == 0
+      m.column_size.should == 3
+    end
+
+    it "has arguments defaulting to 0" do
+      Matrix.empty.should == Matrix.empty(0, 0)
+      Matrix.empty(42).should == Matrix.empty(42, 0)
+    end
+
+    it "does not accept more than two parameters" do
+      ->{
+        Matrix.empty(1, 2, 3)
+      }.should raise_error(ArgumentError)
+    end
+
+    it "raises an error if both dimensions are > 0" do
+      ->{
+        Matrix.empty(1, 2)
+      }.should raise_error(ArgumentError)
+    end
+
+    it "raises an error if any dimension is < 0" do
+      ->{
+        Matrix.empty(-2, 0)
+      }.should raise_error(ArgumentError)
+
+      ->{
+        Matrix.empty(0, -2)
+      }.should raise_error(ArgumentError)
+    end
+
   end
 
-  it "doesn't accept any parameter" do
+  describe "for a subclass of Matrix" do
-    ->{
+    it "returns an instance of that subclass" do
-      Matrix[ [1, 2] ].empty?(42)
+      MatrixSub.empty(0, 1).should be_an_instance_of(MatrixSub)
-    }.should raise_error(ArgumentError)
+    end
-  end
-end
-
-describe "Matrix.empty" do
-  it "returns an empty matrix of the requested size" do
-    m = Matrix.empty(3, 0)
-    m.row_size.should == 3
-    m.column_size.should == 0
-
-    m = Matrix.empty(0, 3)
-    m.row_size.should == 0
-    m.column_size.should == 3
-  end
-
-  it "has arguments defaulting to 0" do
-    Matrix.empty.should == Matrix.empty(0, 0)
-    Matrix.empty(42).should == Matrix.empty(42, 0)
-  end
-
-  it "does not accept more than two parameters" do
-    ->{
-      Matrix.empty(1, 2, 3)
-    }.should raise_error(ArgumentError)
-  end
-
-  it "raises an error if both dimensions are > 0" do
-    ->{
-      Matrix.empty(1, 2)
-    }.should raise_error(ArgumentError)
-  end
-
-  it "raises an error if any dimension is < 0" do
-    ->{
-      Matrix.empty(-2, 0)
-    }.should raise_error(ArgumentError)
-
-    ->{
-      Matrix.empty(0, -2)
-    }.should raise_error(ArgumentError)
-  end
-
-end
-
-describe "for a subclass of Matrix" do
-  it "returns an instance of that subclass" do
-    MatrixSub.empty(0, 1).should be_an_instance_of(MatrixSub)
   end
 end

spec/ruby/library/matrix/eql_spec.rb

@@ -1,11 +1,14 @@
 require_relative '../../spec_helper'
-require_relative 'shared/equal_value'
-require 'matrix'
 
-describe "Matrix#eql?" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :equal, :eql?
+  require_relative 'shared/equal_value'
+  require 'matrix'
 
-  it "returns false if some elements are == but not eql?" do
+  describe "Matrix#eql?" do
-    Matrix[[1, 2],[3, 4]].eql?(Matrix[[1, 2],[3, 4.0]]).should be_false
+    it_behaves_like :equal, :eql?
+
+    it "returns false if some elements are == but not eql?" do
+      Matrix[[1, 2],[3, 4]].eql?(Matrix[[1, 2],[3, 4.0]]).should be_false
+    end
   end
 end

spec/ruby/library/matrix/equal_value_spec.rb

@@ -1,11 +1,14 @@
 require_relative '../../spec_helper'
-require_relative 'shared/equal_value'
-require 'matrix'
 
-describe "Matrix#==" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :equal, :==
+  require_relative 'shared/equal_value'
+  require 'matrix'
 
-  it "returns true if some elements are == but not eql?" do
+  describe "Matrix#==" do
-    Matrix[[1, 2],[3, 4]].should == Matrix[[1, 2],[3, 4.0]]
+    it_behaves_like :equal, :==
+
+    it "returns true if some elements are == but not eql?" do
+      Matrix[[1, 2],[3, 4]].should == Matrix[[1, 2],[3, 4.0]]
+    end
   end
 end

spec/ruby/library/matrix/exponent_spec.rb

@@ -1,64 +1,67 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#**" do
+ruby_version_is ""..."3.1" do
+  require_relative 'fixtures/classes'
+  require 'matrix'
 
-  describe "given an integer _n_" do
+  describe "Matrix#**" do
-    it "multiples the Matrix by itself _n_ times" do
-      m = Matrix[ [7,6], [3,9] ]
-      (m ** 1).should == m
-      (m ** 2).should == Matrix[ [67, 96], [48,99] ]
-      (m ** 2).should == m * m
-      (m ** 3).should == m * m * m
-      (m ** 4).should == m * m * m * m
-      (m ** 5).should == m * m * m * m * m
-    end
 
-    it "raises a ErrDimensionMismatch for non square matrices" do
+    describe "given an integer _n_" do
-      m = Matrix[ [1, 1], [1, 2], [2, 3]]
+      it "multiples the Matrix by itself _n_ times" do
-      -> { m ** 3 }.should raise_error(Matrix::ErrDimensionMismatch)
+        m = Matrix[ [7,6], [3,9] ]
-      -> { m ** 0 }.should raise_error(Matrix::ErrDimensionMismatch)
+        (m ** 1).should == m
-    end
+        (m ** 2).should == Matrix[ [67, 96], [48,99] ]
-
+        (m ** 2).should == m * m
-    describe "that is < 0" do
+        (m ** 3).should == m * m * m
-      it "returns the inverse of **(-n)" do
+        (m ** 4).should == m * m * m * m
-        m = Matrix[ [1, 1], [1, 2] ]
+        (m ** 5).should == m * m * m * m * m
-        (m ** -2).should == Matrix[ [5, -3], [-3, 2]]
-        (m ** -4).should == (m.inverse ** 4)
       end
 
-      it "raises a ErrNotRegular for irregular matrices" do
+      it "raises a ErrDimensionMismatch for non square matrices" do
-        m = Matrix[ [1, 1], [1, 1] ]
+        m = Matrix[ [1, 1], [1, 2], [2, 3]]
-        -> { m ** -2 }.should raise_error(Matrix::ErrNotRegular)
+        -> { m ** 3 }.should raise_error(Matrix::ErrDimensionMismatch)
+        -> { m ** 0 }.should raise_error(Matrix::ErrDimensionMismatch)
       end
-    end
 
-    ruby_version_is '3.1.0' do # https://bugs.ruby-lang.org/issues/17521
+      describe "that is < 0" do
-      describe "that is 0" do
+        it "returns the inverse of **(-n)" do
-        it "returns the identity for square matrices" do
+          m = Matrix[ [1, 1], [1, 2] ]
+          (m ** -2).should == Matrix[ [5, -3], [-3, 2]]
+          (m ** -4).should == (m.inverse ** 4)
+        end
+
+        it "raises a ErrNotRegular for irregular matrices" do
           m = Matrix[ [1, 1], [1, 1] ]
-          (m ** 0).should == Matrix.identity(2)
+          -> { m ** -2 }.should raise_error(Matrix::ErrNotRegular)
         end
+      end
 
-        it "raises an ErrDimensionMismatch for non-square matrices" do
+      ruby_version_is '3.1.0' do # https://bugs.ruby-lang.org/issues/17521
-          m = Matrix[ [1, 1] ]
+        describe "that is 0" do
-          -> { m ** 0 }.should raise_error(Matrix::ErrDimensionMismatch)
+          it "returns the identity for square matrices" do
+            m = Matrix[ [1, 1], [1, 1] ]
+            (m ** 0).should == Matrix.identity(2)
+          end
+
+          it "raises an ErrDimensionMismatch for non-square matrices" do
+            m = Matrix[ [1, 1] ]
+            -> { m ** 0 }.should raise_error(Matrix::ErrDimensionMismatch)
+          end
         end
       end
     end
-  end
 
-  it "returns the power for non integer powers" do
+    it "returns the power for non integer powers" do
-    a = Matrix[[5, 4], [4, 5]]
+      a = Matrix[[5, 4], [4, 5]]
-    ((a ** 0.5) ** 2).round(8).should == a
+      ((a ** 0.5) ** 2).round(8).should == a
-    a = Matrix[[7, 10], [15, 22]]
+      a = Matrix[[7, 10], [15, 22]]
-    ((a ** 0.25) ** 4).round(8).should == a
+      ((a ** 0.25) ** 4).round(8).should == a
-  end
+    end
 
-  describe "for a subclass of Matrix" do
+    describe "for a subclass of Matrix" do
-    it "returns an instance of that subclass" do
+      it "returns an instance of that subclass" do
-      (MatrixSub.ins ** 1).should be_an_instance_of(MatrixSub)
+        (MatrixSub.ins ** 1).should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/find_index_spec.rb

@@ -1,146 +1,149 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#find_index without any argument" do
+ruby_version_is ""..."3.1" do
-  before :all do
+  require 'matrix'
-    @m = Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ]
-  end
 
-  it "returns an Enumerator when called without a block" do
+  describe "Matrix#find_index without any argument" do
-    enum = @m.find_index
+    before :all do
-    enum.should be_an_instance_of(Enumerator)
+      @m = Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ]
-    enum.to_a.should == [1, 2, 3, 4, 5, 6, 7, 8]
+    end
-  end
 
-  it "returns nil if the block is always false" do
-    @m.find_index{false}.should be_nil
-  end
-
-  it "returns the first index for which the block is true" do
-    @m.find_index{|x| x >= 3}.should == [0, 2]
-  end
-end
-
-describe "Matrix#find_index with a subselection argument" do
-  before :all do
-    @tests = [
-    [  Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ], {
-        diagonal: [1, 6]               ,
-        off_diagonal: [2, 3, 4, 5, 7, 8],
-        lower: [1, 5, 6]               ,
-        strict_lower: [5]              ,
-        strict_upper: [2, 3, 4, 7, 8]  ,
-        upper: [1, 2, 3, 4, 6, 7, 8]   ,
-      }
-    ],
-    [  Matrix[ [1, 2], [3, 4], [5, 6], [7, 8] ], {
-        diagonal: [1, 4]               ,
-        off_diagonal: [2, 3, 5, 6, 7, 8],
-        lower: [1, 3, 4, 5, 6, 7, 8]   ,
-        strict_lower: [3, 5, 6, 7, 8]  ,
-        strict_upper: [2]              ,
-        upper: [1, 2, 4]               ,
-      }
-    ]]
-  end
-
-  describe "and no generic argument" do
     it "returns an Enumerator when called without a block" do
-      @tests.each do |matrix, h|
+      enum = @m.find_index
-        h.each do |selector, result|
+      enum.should be_an_instance_of(Enumerator)
-          matrix.find_index(selector).should be_an_instance_of(Enumerator)
+      enum.to_a.should == [1, 2, 3, 4, 5, 6, 7, 8]
-        end
-      end
-    end
-
-    it "yields the rights elements" do
-      @tests.each do |matrix, h|
-        h.each do |selector, result|
-          matrix.find_index(selector).to_a.should == result
-        end
-      end
-    end
-
-    it "returns the first index for which the block returns true" do
-      @tests.each do |matrix, h|
-        h.each do |selector, result|
-          cnt = result.size.div 2
-          which = result[cnt]
-          idx = matrix.find_index(selector){|x| cnt -= 1; x == which}
-          matrix[*idx].should == which
-          cnt.should == -1
-        end
-      end
     end
 
     it "returns nil if the block is always false" do
-      @tests.each do |matrix, h|
+      @m.find_index{false}.should be_nil
-        h.each do |selector, result|
+    end
-          matrix.find_index(selector){ nil }.should == nil
+
+    it "returns the first index for which the block is true" do
+      @m.find_index{|x| x >= 3}.should == [0, 2]
+    end
+  end
+
+  describe "Matrix#find_index with a subselection argument" do
+    before :all do
+      @tests = [
+      [  Matrix[ [1, 2, 3, 4], [5, 6, 7, 8] ], {
+          diagonal: [1, 6]               ,
+          off_diagonal: [2, 3, 4, 5, 7, 8],
+          lower: [1, 5, 6]               ,
+          strict_lower: [5]              ,
+          strict_upper: [2, 3, 4, 7, 8]  ,
+          upper: [1, 2, 3, 4, 6, 7, 8]   ,
+        }
+      ],
+      [  Matrix[ [1, 2], [3, 4], [5, 6], [7, 8] ], {
+          diagonal: [1, 4]               ,
+          off_diagonal: [2, 3, 5, 6, 7, 8],
+          lower: [1, 3, 4, 5, 6, 7, 8]   ,
+          strict_lower: [3, 5, 6, 7, 8]  ,
+          strict_upper: [2]              ,
+          upper: [1, 2, 4]               ,
+        }
+      ]]
+    end
+
+    describe "and no generic argument" do
+      it "returns an Enumerator when called without a block" do
+        @tests.each do |matrix, h|
+          h.each do |selector, result|
+            matrix.find_index(selector).should be_an_instance_of(Enumerator)
+          end
+        end
+      end
+
+      it "yields the rights elements" do
+        @tests.each do |matrix, h|
+          h.each do |selector, result|
+            matrix.find_index(selector).to_a.should == result
+          end
+        end
+      end
+
+      it "returns the first index for which the block returns true" do
+        @tests.each do |matrix, h|
+          h.each do |selector, result|
+            cnt = result.size.div 2
+            which = result[cnt]
+            idx = matrix.find_index(selector){|x| cnt -= 1; x == which}
+            matrix[*idx].should == which
+            cnt.should == -1
+          end
+        end
+      end
+
+      it "returns nil if the block is always false" do
+        @tests.each do |matrix, h|
+          h.each do |selector, result|
+            matrix.find_index(selector){ nil }.should == nil
+          end
+        end
+      end
+
+    end
+
+    describe "and a generic argument" do
+      it "ignores a block" do
+        @m.find_index(42, :diagonal){raise "oups"}.should == nil
+      end
+
+      it "returns the index of the requested value" do
+        @tests.each do |matrix, h|
+          h.each do |selector, result|
+            cnt = result.size / 2
+            which = result[cnt]
+            idx = matrix.find_index(which, selector)
+            matrix[*idx].should == which
+          end
+        end
+      end
+
+      it "returns nil if the requested value is not found" do
+        @tests.each do |matrix, h|
+          h.each do |selector, result|
+            matrix.find_index(42, selector).should == nil
+          end
         end
       end
     end
 
   end
 
-  describe "and a generic argument" do
+  describe "Matrix#find_index with only a generic argument" do
+    before :all do
+      @m = Matrix[ [1, 2, 3, 4], [1, 2, 3, 4] ]
+    end
+
+    it "returns nil if the value is not found" do
+      @m.find_index(42).should be_nil
+    end
+
+    it "returns the first index for of the requested value" do
+      @m.find_index(3).should == [0, 2]
+    end
+
     it "ignores a block" do
-      @m.find_index(42, :diagonal){raise "oups"}.should == nil
+      @m.find_index(4){raise "oups"}.should == [0, 3]
-    end
-
-    it "returns the index of the requested value" do
-      @tests.each do |matrix, h|
-        h.each do |selector, result|
-          cnt = result.size / 2
-          which = result[cnt]
-          idx = matrix.find_index(which, selector)
-          matrix[*idx].should == which
-        end
-      end
-    end
-
-    it "returns nil if the requested value is not found" do
-      @tests.each do |matrix, h|
-        h.each do |selector, result|
-          matrix.find_index(42, selector).should == nil
-        end
-      end
     end
   end
 
-end
+  describe "Matrix#find_index with two arguments" do
-
+    it "raises an ArgumentError for an unrecognized last argument" do
-describe "Matrix#find_index with only a generic argument" do
+      -> {
-  before :all do
+        @m.find_index(1, "all"){}
-    @m = Matrix[ [1, 2, 3, 4], [1, 2, 3, 4] ]
+      }.should raise_error(ArgumentError)
-  end
+      -> {
-
+        @m.find_index(1, nil){}
-  it "returns nil if the value is not found" do
+      }.should raise_error(ArgumentError)
-    @m.find_index(42).should be_nil
+      -> {
-  end
+        @m.find_index(1, :left){}
-
+      }.should raise_error(ArgumentError)
-  it "returns the first index for of the requested value" do
+      -> {
-    @m.find_index(3).should == [0, 2]
+        @m.find_index(:diagonal, 1){}
-  end
+      }.should raise_error(ArgumentError)
-
+    end
-  it "ignores a block" do
-    @m.find_index(4){raise "oups"}.should == [0, 3]
-  end
-end
-
-describe "Matrix#find_index with two arguments" do
-  it "raises an ArgumentError for an unrecognized last argument" do
-    -> {
-      @m.find_index(1, "all"){}
-    }.should raise_error(ArgumentError)
-    -> {
-      @m.find_index(1, nil){}
-    }.should raise_error(ArgumentError)
-    -> {
-      @m.find_index(1, :left){}
-    }.should raise_error(ArgumentError)
-    -> {
-      @m.find_index(:diagonal, 1){}
-    }.should raise_error(ArgumentError)
   end
 end

spec/ruby/library/matrix/hash_spec.rb

@@ -1,15 +1,18 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#hash" do
+ruby_version_is ""..."3.1" do
+  require 'matrix'
+
+  describe "Matrix#hash" do
+
+    it "returns an Integer" do
+      Matrix[ [1,2] ].hash.should be_an_instance_of(Integer)
+    end
+
+    it "returns the same value for the same matrix" do
+      data = [ [40,5], [2,7] ]
+      Matrix[ *data ].hash.should == Matrix[ *data ].hash
+    end
 
-  it "returns an Integer" do
-    Matrix[ [1,2] ].hash.should be_an_instance_of(Integer)
   end
-
-  it "returns the same value for the same matrix" do
-    data = [ [40,5], [2,7] ]
-    Matrix[ *data ].hash.should == Matrix[ *data ].hash
-  end
-
 end

spec/ruby/library/matrix/hermitian_spec.rb

@@ -1,34 +1,37 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.hermitian?" do
+ruby_version_is ""..."3.1" do
-  it "returns true for a hermitian Matrix" do
+  require 'matrix'
-    Matrix[[1, 2, Complex(0, 3)], [2, 4, 5], [Complex(0, -3), 5, 6]].hermitian?.should be_true
-  end
 
-  it "returns true for a 0x0 empty matrix" do
+  describe "Matrix.hermitian?" do
-    Matrix.empty.hermitian?.should be_true
+    it "returns true for a hermitian Matrix" do
-  end
+      Matrix[[1, 2, Complex(0, 3)], [2, 4, 5], [Complex(0, -3), 5, 6]].hermitian?.should be_true
+    end
 
-  it "returns false for an asymmetric Matrix" do
+    it "returns true for a 0x0 empty matrix" do
-    Matrix[[1, 2],[-2, 1]].hermitian?.should be_false
+      Matrix.empty.hermitian?.should be_true
-  end
+    end
 
-  it "raises an error for rectangular matrices" do
+    it "returns false for an asymmetric Matrix" do
-    [
+      Matrix[[1, 2],[-2, 1]].hermitian?.should be_false
-      Matrix[[0], [0]],
+    end
-      Matrix[[0, 0]],
+
-      Matrix.empty(0, 2),
+    it "raises an error for rectangular matrices" do
-      Matrix.empty(2, 0),
+      [
-    ].each do |rectangular_matrix|
+        Matrix[[0], [0]],
-      -> {
+        Matrix[[0, 0]],
-        rectangular_matrix.hermitian?
+        Matrix.empty(0, 2),
-      }.should raise_error(Matrix::ErrDimensionMismatch)
+        Matrix.empty(2, 0),
+      ].each do |rectangular_matrix|
+        -> {
+          rectangular_matrix.hermitian?
+        }.should raise_error(Matrix::ErrDimensionMismatch)
+      end
+    end
+
+    it "returns false for a matrix with complex values on the diagonal" do
+      Matrix[[Complex(1,1)]].hermitian?.should be_false
+      Matrix[[Complex(1,0)]].hermitian?.should be_true
     end
   end
-
-  it "returns false for a matrix with complex values on the diagonal" do
-    Matrix[[Complex(1,1)]].hermitian?.should be_false
-    Matrix[[Complex(1,0)]].hermitian?.should be_true
-  end
 end

spec/ruby/library/matrix/identity_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/identity'
 
-describe "Matrix.identity" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_identity, :identity
+  require_relative 'shared/identity'
+
+  describe "Matrix.identity" do
+    it_behaves_like :matrix_identity, :identity
+  end
 end

spec/ruby/library/matrix/imag_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/imaginary'
 
-describe "Matrix#imag" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_imaginary, :imag
+  require_relative 'shared/imaginary'
+
+  describe "Matrix#imag" do
+    it_behaves_like :matrix_imaginary, :imag
+  end
 end

spec/ruby/library/matrix/imaginary_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/imaginary'
 
-describe "Matrix#imaginary" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_imaginary, :imaginary
+  require_relative 'shared/imaginary'
+
+  describe "Matrix#imaginary" do
+    it_behaves_like :matrix_imaginary, :imaginary
+  end
 end

spec/ruby/library/matrix/inspect_spec.rb

@@ -1,27 +1,30 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#inspect" do
+ruby_version_is ""..."3.1" do
+  require_relative 'fixtures/classes'
+  require 'matrix'
 
-  it "returns a stringified representation of the Matrix" do
+  describe "Matrix#inspect" do
-    Matrix[ [1,2], [2,1] ].inspect.should == "Matrix[[1, 2], [2, 1]]"
-  end
 
-  it "returns 'Matrix.empty(...)' for empty matrices" do
+    it "returns a stringified representation of the Matrix" do
-    Matrix[ [], [], [] ].inspect.should == "Matrix.empty(3, 0)"
+      Matrix[ [1,2], [2,1] ].inspect.should == "Matrix[[1, 2], [2, 1]]"
-    Matrix.columns([ [], [], [] ]).inspect.should == "Matrix.empty(0, 3)"
+    end
-  end
 
-  it "calls inspect on its contents" do
+    it "returns 'Matrix.empty(...)' for empty matrices" do
-    obj = mock("some_value")
+      Matrix[ [], [], [] ].inspect.should == "Matrix.empty(3, 0)"
-    obj.should_receive(:inspect).and_return("some_value")
+      Matrix.columns([ [], [], [] ]).inspect.should == "Matrix.empty(0, 3)"
-    Matrix[ [1, 2], [3, obj] ].inspect.should == "Matrix[[1, 2], [3, some_value]]"
+    end
-  end
 
-  describe "for a subclass of Matrix" do
+    it "calls inspect on its contents" do
-    it "returns a string using the subclass' name" do
+      obj = mock("some_value")
-      MatrixSub.ins.inspect.should == "MatrixSub[[1, 0], [0, 1]]"
+      obj.should_receive(:inspect).and_return("some_value")
+      Matrix[ [1, 2], [3, obj] ].inspect.should == "Matrix[[1, 2], [3, some_value]]"
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns a string using the subclass' name" do
+        MatrixSub.ins.inspect.should == "MatrixSub[[1, 0], [0, 1]]"
+      end
     end
   end
 end

spec/ruby/library/matrix/inv_spec.rb

@@ -1,7 +1,10 @@
 require_relative '../../spec_helper'
-require_relative 'spec_helper'
-require_relative 'shared/inverse'
 
-describe "Matrix#inv" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :inverse, :inv
+  require_relative 'spec_helper'
+  require_relative 'shared/inverse'
+
+  describe "Matrix#inv" do
+    it_behaves_like :inverse, :inv
+  end
 end

spec/ruby/library/matrix/inverse_from_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#inverse_from" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix#inverse_from" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/inverse_spec.rb

@@ -1,7 +1,10 @@
 require_relative '../../spec_helper'
-require_relative 'spec_helper'
-require_relative 'shared/inverse'
 
-describe "Matrix#inverse" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :inverse, :inverse
+  require_relative 'spec_helper'
+  require_relative 'shared/inverse'
+
+  describe "Matrix#inverse" do
+    it_behaves_like :inverse, :inverse
+  end
 end

spec/ruby/library/matrix/lower_triangular_spec.rb

@@ -1,24 +1,27 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.lower_triangular?" do
+ruby_version_is ""..."3.1" do
-  it "returns true for a square lower triangular Matrix" do
+  require 'matrix'
-    Matrix[[1, 0, 0], [1, 2, 0], [1, 2, 3]].lower_triangular?.should be_true
-    Matrix.diagonal([1, 2, 3]).lower_triangular?.should be_true
-    Matrix[[1, 0], [1, 2], [1, 2], [1, 2]].lower_triangular?.should be_true
-    Matrix[[1, 0, 0, 0], [1, 2, 0, 0]].lower_triangular?.should be_true
-  end
 
-  it "returns true for an empty Matrix" do
+  describe "Matrix.lower_triangular?" do
-    Matrix.empty(3, 0).lower_triangular?.should be_true
+    it "returns true for a square lower triangular Matrix" do
-    Matrix.empty(0, 3).lower_triangular?.should be_true
+      Matrix[[1, 0, 0], [1, 2, 0], [1, 2, 3]].lower_triangular?.should be_true
-    Matrix.empty(0, 0).lower_triangular?.should be_true
+      Matrix.diagonal([1, 2, 3]).lower_triangular?.should be_true
-  end
+      Matrix[[1, 0], [1, 2], [1, 2], [1, 2]].lower_triangular?.should be_true
+      Matrix[[1, 0, 0, 0], [1, 2, 0, 0]].lower_triangular?.should be_true
+    end
 
-  it "returns false for a non lower triangular square Matrix" do
+    it "returns true for an empty Matrix" do
-    Matrix[[0, 1], [0, 0]].lower_triangular?.should be_false
+      Matrix.empty(3, 0).lower_triangular?.should be_true
-    Matrix[[1, 2, 3], [1, 2, 3], [1, 2, 3]].lower_triangular?.should be_false
+      Matrix.empty(0, 3).lower_triangular?.should be_true
-    Matrix[[0, 1], [0, 0], [0, 0], [0, 0]].lower_triangular?.should be_false
+      Matrix.empty(0, 0).lower_triangular?.should be_true
-    Matrix[[0, 0, 0, 1], [0, 0, 0, 0]].lower_triangular?.should be_false
+    end
+
+    it "returns false for a non lower triangular square Matrix" do
+      Matrix[[0, 1], [0, 0]].lower_triangular?.should be_false
+      Matrix[[1, 2, 3], [1, 2, 3], [1, 2, 3]].lower_triangular?.should be_false
+      Matrix[[0, 1], [0, 0], [0, 0], [0, 0]].lower_triangular?.should be_false
+      Matrix[[0, 0, 0, 1], [0, 0, 0, 0]].lower_triangular?.should be_false
+    end
   end
 end

spec/ruby/library/matrix/lup_decomposition/determinant_spec.rb

@@ -1,21 +1,24 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::LUPDecomposition#determinant" do
+ruby_version_is ""..."3.1" do
-  it "returns the determinant when the matrix is square" do
+  require 'matrix'
-    a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-    a.lup.determinant.should == 15120 # == a.determinant
-  end
 
-  it "raises an error for rectangular matrices" do
+  describe "Matrix::LUPDecomposition#determinant" do
-    [
+    it "returns the determinant when the matrix is square" do
-      Matrix[[7, 8, 9], [14, 46, 51]],
+      a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-      Matrix[[7, 8], [14, 46], [28, 82]],
+      a.lup.determinant.should == 15120 # == a.determinant
-    ].each do |m|
+    end
-      lup = m.lup
+
-      -> {
+    it "raises an error for rectangular matrices" do
-        lup.determinant
+      [
-      }.should raise_error(Matrix::ErrDimensionMismatch)
+        Matrix[[7, 8, 9], [14, 46, 51]],
+        Matrix[[7, 8], [14, 46], [28, 82]],
+      ].each do |m|
+        lup = m.lup
+        -> {
+          lup.determinant
+        }.should raise_error(Matrix::ErrDimensionMismatch)
+      end
     end
   end
 end

spec/ruby/library/matrix/lup_decomposition/initialize_spec.rb

@@ -1,13 +1,16 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::LUPDecomposition#initialize" do
+ruby_version_is ""..."3.1" do
-  it "raises an error if argument is not a matrix" do
+  require 'matrix'
-    -> {
+
-      Matrix::LUPDecomposition.new([[]])
+  describe "Matrix::LUPDecomposition#initialize" do
-    }.should raise_error(TypeError)
+    it "raises an error if argument is not a matrix" do
-    -> {
+      -> {
-      Matrix::LUPDecomposition.new(42)
+        Matrix::LUPDecomposition.new([[]])
-    }.should raise_error(TypeError)
+      }.should raise_error(TypeError)
+      -> {
+        Matrix::LUPDecomposition.new(42)
+      }.should raise_error(TypeError)
+    end
   end
 end

spec/ruby/library/matrix/lup_decomposition/l_spec.rb

@@ -1,18 +1,21 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::LUPDecomposition#l" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require 'matrix'
-    @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-    @lu = Matrix::LUPDecomposition.new(@a)
-    @l = @lu.l
-  end
 
-  it "returns the first element of to_a" do
+  describe "Matrix::LUPDecomposition#l" do
-    @l.should == @lu.to_a[0]
+    before :each do
-  end
+      @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
+      @lu = Matrix::LUPDecomposition.new(@a)
+      @l = @lu.l
+    end
 
-  it "returns a lower triangular matrix" do
+    it "returns the first element of to_a" do
-    @l.lower_triangular?.should be_true
+      @l.should == @lu.to_a[0]
+    end
+
+    it "returns a lower triangular matrix" do
+      @l.lower_triangular?.should be_true
+    end
   end
 end

spec/ruby/library/matrix/lup_decomposition/p_spec.rb

@@ -1,18 +1,21 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::LUPDecomposition#p" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require 'matrix'
-    @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-    @lu = Matrix::LUPDecomposition.new(@a)
-    @p = @lu.p
-  end
 
-  it "returns the third element of to_a" do
+  describe "Matrix::LUPDecomposition#p" do
-    @p.should == @lu.to_a[2]
+    before :each do
-  end
+      @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
+      @lu = Matrix::LUPDecomposition.new(@a)
+      @p = @lu.p
+    end
 
-  it "returns a permutation matrix" do
+    it "returns the third element of to_a" do
-    @p.permutation?.should be_true
+      @p.should == @lu.to_a[2]
+    end
+
+    it "returns a permutation matrix" do
+      @p.permutation?.should be_true
+    end
   end
 end

spec/ruby/library/matrix/lup_decomposition/solve_spec.rb

@@ -1,52 +1,55 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::LUPDecomposition#solve" do
+ruby_version_is ""..."3.1" do
-  describe "for rectangular matrices" do
+  require 'matrix'
-    it "raises an error for singular matrices" do
-      a = Matrix[[1, 2, 3], [1, 3, 5], [2, 5, 8]]
-      lu = Matrix::LUPDecomposition.new(a)
-      -> {
-        lu.solve(a)
-      }.should raise_error(Matrix::ErrNotRegular)
-    end
 
-    describe "for non singular matrices" do
+  describe "Matrix::LUPDecomposition#solve" do
-      before :each do
+    describe "for rectangular matrices" do
-        @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
+      it "raises an error for singular matrices" do
-        @lu = Matrix::LUPDecomposition.new(@a)
+        a = Matrix[[1, 2, 3], [1, 3, 5], [2, 5, 8]]
-      end
+        lu = Matrix::LUPDecomposition.new(a)
-
-      it "returns the appropriate empty matrix when given an empty matrix" do
-        @lu.solve(Matrix.empty(3,0)).should == Matrix.empty(3,0)
-        empty = Matrix::LUPDecomposition.new(Matrix.empty(0, 0))
-        empty.solve(Matrix.empty(0,3)).should == Matrix.empty(0,3)
-      end
-
-      it "returns the right matrix when given a matrix of the appropriate size" do
-        solution = Matrix[[1, 2, 3, 4], [0, 1, 2, 3], [-1, -2, -3, -4]]
-        values = Matrix[[-2, 4, 10, 16], [-37, -28, -19, -10], [-135, -188, -241, -294]] # == @a * solution
-        @lu.solve(values).should == solution
-      end
-
-      it "raises an error when given a matrix of the wrong size" do
-        values = Matrix[[1, 2, 3, 4], [0, 1, 2, 3]]
         -> {
-          @lu.solve(values)
+          lu.solve(a)
-        }.should raise_error(Matrix::ErrDimensionMismatch)
+        }.should raise_error(Matrix::ErrNotRegular)
       end
 
-      it "returns the right vector when given a vector of the appropriate size" do
+      describe "for non singular matrices" do
-        solution = Vector[1, 2, -1]
+        before :each do
-        values = Vector[14, 55, 29] # == @a * solution
+          @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-        @lu.solve(values).should == solution
+          @lu = Matrix::LUPDecomposition.new(@a)
-      end
+        end
 
-      it "raises an error when given a vector of the wrong size" do
+        it "returns the appropriate empty matrix when given an empty matrix" do
-        values = Vector[14, 55]
+          @lu.solve(Matrix.empty(3,0)).should == Matrix.empty(3,0)
-        -> {
+          empty = Matrix::LUPDecomposition.new(Matrix.empty(0, 0))
-          @lu.solve(values)
+          empty.solve(Matrix.empty(0,3)).should == Matrix.empty(0,3)
-        }.should raise_error(Matrix::ErrDimensionMismatch)
+        end
+
+        it "returns the right matrix when given a matrix of the appropriate size" do
+          solution = Matrix[[1, 2, 3, 4], [0, 1, 2, 3], [-1, -2, -3, -4]]
+          values = Matrix[[-2, 4, 10, 16], [-37, -28, -19, -10], [-135, -188, -241, -294]] # == @a * solution
+          @lu.solve(values).should == solution
+        end
+
+        it "raises an error when given a matrix of the wrong size" do
+          values = Matrix[[1, 2, 3, 4], [0, 1, 2, 3]]
+          -> {
+            @lu.solve(values)
+          }.should raise_error(Matrix::ErrDimensionMismatch)
+        end
+
+        it "returns the right vector when given a vector of the appropriate size" do
+          solution = Vector[1, 2, -1]
+          values = Vector[14, 55, 29] # == @a * solution
+          @lu.solve(values).should == solution
+        end
+
+        it "raises an error when given a vector of the wrong size" do
+          values = Vector[14, 55]
+          -> {
+            @lu.solve(values)
+          }.should raise_error(Matrix::ErrDimensionMismatch)
+        end
       end
     end
   end

spec/ruby/library/matrix/lup_decomposition/to_a_spec.rb

@@ -1,33 +1,36 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::LUPDecomposition#to_a" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require 'matrix'
-    @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-    @lu = Matrix::LUPDecomposition.new(@a)
-    @to_a = @lu.to_a
-    @l, @u, @p = @to_a
-  end
 
-  it "returns an array of three matrices" do
+  describe "Matrix::LUPDecomposition#to_a" do
-    @to_a.should be_kind_of(Array)
+    before :each do
-    @to_a.length.should == 3
+      @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-    @to_a.each{|m| m.should be_kind_of(Matrix)}
+      @lu = Matrix::LUPDecomposition.new(@a)
-  end
+      @to_a = @lu.to_a
-
+      @l, @u, @p = @to_a
-  it "returns [l, u, p] such that l*u == a*p" do
-    (@l * @u).should == (@p * @a)
-  end
-
-  it "returns the right values for rectangular matrices" do
-    [
-      Matrix[[7, 8, 9], [14, 46, 51]],
-      Matrix[[4, 11], [5, 8], [3, 4]],
-    ].each do |a|
-      l, u, p = Matrix::LUPDecomposition.new(a).to_a
-      (l * u).should == (p * a)
     end
-  end
 
-  it "has other properties implied by the specs of #l, #u and #p"
+    it "returns an array of three matrices" do
+      @to_a.should be_kind_of(Array)
+      @to_a.length.should == 3
+      @to_a.each{|m| m.should be_kind_of(Matrix)}
+    end
+
+    it "returns [l, u, p] such that l*u == a*p" do
+      (@l * @u).should == (@p * @a)
+    end
+
+    it "returns the right values for rectangular matrices" do
+      [
+        Matrix[[7, 8, 9], [14, 46, 51]],
+        Matrix[[4, 11], [5, 8], [3, 4]],
+      ].each do |a|
+        l, u, p = Matrix::LUPDecomposition.new(a).to_a
+        (l * u).should == (p * a)
+      end
+    end
+
+    it "has other properties implied by the specs of #l, #u and #p"
+  end
 end

spec/ruby/library/matrix/lup_decomposition/u_spec.rb

@@ -1,18 +1,21 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::LUPDecomposition#u" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require 'matrix'
-    @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-    @lu = Matrix::LUPDecomposition.new(@a)
-    @u = @lu.u
-  end
 
-  it "returns the second element of to_a" do
+  describe "Matrix::LUPDecomposition#u" do
-    @u.should == @lu.to_a[1]
+    before :each do
-  end
+      @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
+      @lu = Matrix::LUPDecomposition.new(@a)
+      @u = @lu.u
+    end
 
-  it "returns an upper triangular matrix" do
+    it "returns the second element of to_a" do
-    @u.upper_triangular?.should be_true
+      @u.should == @lu.to_a[1]
+    end
+
+    it "returns an upper triangular matrix" do
+      @u.upper_triangular?.should be_true
+    end
   end
 end

spec/ruby/library/matrix/map_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/collect'
 
-describe "Matrix#map" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :collect, :map
+  require_relative 'shared/collect'
+
+  describe "Matrix#map" do
+    it_behaves_like :collect, :map
+  end
 end

spec/ruby/library/matrix/minor_spec.rb

@@ -1,85 +1,88 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#minor" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'fixtures/classes'
-    @matrix = Matrix[ [1,2], [3,4], [5,6] ]
+  require 'matrix'
-  end
 
-  describe "with start_row, nrows, start_col, ncols" do
+  describe "Matrix#minor" do
-    it "returns the given portion of the Matrix" do
+    before :each do
-      @matrix.minor(0,1,0,2).should == Matrix[ [1, 2] ]
+      @matrix = Matrix[ [1,2], [3,4], [5,6] ]
-      @matrix.minor(1,2,1,1).should == Matrix[ [4], [6] ]
     end
 
-    it "returns an empty Matrix if nrows or ncols is 0" do
+    describe "with start_row, nrows, start_col, ncols" do
-      @matrix.minor(0,0,0,0).should == Matrix[]
+      it "returns the given portion of the Matrix" do
-      @matrix.minor(1,0,1,0).should == Matrix[]
+        @matrix.minor(0,1,0,2).should == Matrix[ [1, 2] ]
-      @matrix.minor(1,0,1,1).should == Matrix.columns([[]])
+        @matrix.minor(1,2,1,1).should == Matrix[ [4], [6] ]
-      @matrix.minor(1,1,1,0).should == Matrix[[]]
+      end
+
+      it "returns an empty Matrix if nrows or ncols is 0" do
+        @matrix.minor(0,0,0,0).should == Matrix[]
+        @matrix.minor(1,0,1,0).should == Matrix[]
+        @matrix.minor(1,0,1,1).should == Matrix.columns([[]])
+        @matrix.minor(1,1,1,0).should == Matrix[[]]
+      end
+
+      it "returns nil for out-of-bounds start_row/col" do
+        r = @matrix.row_size + 1
+        c = @matrix.column_size + 1
+        @matrix.minor(r,0,0,10).should == nil
+        @matrix.minor(0,10,c,9).should == nil
+        @matrix.minor(-r,0,0,10).should == nil
+        @matrix.minor(0,10,-c,9).should == nil
+      end
+
+      it "returns nil for negative nrows or ncols" do
+        @matrix.minor(0,1,0,-1).should == nil
+        @matrix.minor(0,-1,0,1).should == nil
+      end
+
+      it "start counting backwards for start_row or start_col below zero" do
+        @matrix.minor(0, 1, -1, 1).should == @matrix.minor(0, 1, 1, 1)
+        @matrix.minor(-1, 1, 0, 1).should == @matrix.minor(2, 1, 0, 1)
+      end
+
+      it "returns empty matrices for extreme start_row/col" do
+        @matrix.minor(3,10,1,10).should == Matrix.columns([[]])
+        @matrix.minor(1,10,2,10).should == Matrix[[], []]
+        @matrix.minor(3,0,0,10).should == Matrix.columns([[], []])
+      end
+
+      it "ignores big nrows or ncols" do
+        @matrix.minor(0,1,0,20).should == Matrix[ [1, 2] ]
+        @matrix.minor(1,20,1,1).should == Matrix[ [4], [6] ]
+      end
     end
 
-    it "returns nil for out-of-bounds start_row/col" do
+    describe "with col_range, row_range" do
-      r = @matrix.row_size + 1
+      it "returns the given portion of the Matrix" do
-      c = @matrix.column_size + 1
+        @matrix.minor(0..0, 0..1).should == Matrix[ [1, 2] ]
-      @matrix.minor(r,0,0,10).should == nil
+        @matrix.minor(1..2, 1..2).should == Matrix[ [4], [6] ]
-      @matrix.minor(0,10,c,9).should == nil
+        @matrix.minor(1...3, 1...3).should == Matrix[ [4], [6] ]
-      @matrix.minor(-r,0,0,10).should == nil
+      end
-      @matrix.minor(0,10,-c,9).should == nil
+
+      it "returns nil if col_range or row_range is out of range" do
+        r = @matrix.row_size + 1
+        c = @matrix.column_size + 1
+        @matrix.minor(r..6, c..6).should == nil
+        @matrix.minor(0..1, c..6).should == nil
+        @matrix.minor(r..6, 0..1).should == nil
+        @matrix.minor(-r..6, -c..6).should == nil
+        @matrix.minor(0..1, -c..6).should == nil
+        @matrix.minor(-r..6, 0..1).should == nil
+      end
+
+      it "start counting backwards for col_range or row_range below zero" do
+        @matrix.minor(0..1, -2..-1).should == @matrix.minor(0..1, 0..1)
+        @matrix.minor(0..1, -2..1).should == @matrix.minor(0..1, 0..1)
+        @matrix.minor(-2..-1, 0..1).should == @matrix.minor(1..2, 0..1)
+        @matrix.minor(-2..2, 0..1).should == @matrix.minor(1..2, 0..1)
+      end
     end
 
-    it "returns nil for negative nrows or ncols" do
+    describe "for a subclass of Matrix" do
-      @matrix.minor(0,1,0,-1).should == nil
+      it "returns an instance of that subclass" do
-      @matrix.minor(0,-1,0,1).should == nil
+        MatrixSub.ins.minor(0, 1, 0, 1).should be_an_instance_of(MatrixSub)
-    end
+      end
-
-    it "start counting backwards for start_row or start_col below zero" do
-      @matrix.minor(0, 1, -1, 1).should == @matrix.minor(0, 1, 1, 1)
-      @matrix.minor(-1, 1, 0, 1).should == @matrix.minor(2, 1, 0, 1)
-    end
-
-    it "returns empty matrices for extreme start_row/col" do
-      @matrix.minor(3,10,1,10).should == Matrix.columns([[]])
-      @matrix.minor(1,10,2,10).should == Matrix[[], []]
-      @matrix.minor(3,0,0,10).should == Matrix.columns([[], []])
-    end
-
-    it "ignores big nrows or ncols" do
-      @matrix.minor(0,1,0,20).should == Matrix[ [1, 2] ]
-      @matrix.minor(1,20,1,1).should == Matrix[ [4], [6] ]
-    end
-  end
-
-  describe "with col_range, row_range" do
-    it "returns the given portion of the Matrix" do
-      @matrix.minor(0..0, 0..1).should == Matrix[ [1, 2] ]
-      @matrix.minor(1..2, 1..2).should == Matrix[ [4], [6] ]
-      @matrix.minor(1...3, 1...3).should == Matrix[ [4], [6] ]
-    end
-
-    it "returns nil if col_range or row_range is out of range" do
-      r = @matrix.row_size + 1
-      c = @matrix.column_size + 1
-      @matrix.minor(r..6, c..6).should == nil
-      @matrix.minor(0..1, c..6).should == nil
-      @matrix.minor(r..6, 0..1).should == nil
-      @matrix.minor(-r..6, -c..6).should == nil
-      @matrix.minor(0..1, -c..6).should == nil
-      @matrix.minor(-r..6, 0..1).should == nil
-    end
-
-    it "start counting backwards for col_range or row_range below zero" do
-      @matrix.minor(0..1, -2..-1).should == @matrix.minor(0..1, 0..1)
-      @matrix.minor(0..1, -2..1).should == @matrix.minor(0..1, 0..1)
-      @matrix.minor(-2..-1, 0..1).should == @matrix.minor(1..2, 0..1)
-      @matrix.minor(-2..2, 0..1).should == @matrix.minor(1..2, 0..1)
-    end
-  end
-
-  describe "for a subclass of Matrix" do
-    it "returns an instance of that subclass" do
-      MatrixSub.ins.minor(0, 1, 0, 1).should be_an_instance_of(MatrixSub)
     end
   end
 end

spec/ruby/library/matrix/minus_spec.rb

@@ -1,42 +1,45 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#-" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'fixtures/classes'
-    @a = Matrix[ [1, 2], [3, 4] ]
+  require 'matrix'
-    @b = Matrix[ [4, 5], [6, 7] ]
-  end
 
-  it "returns the result of subtracting the corresponding elements of other from self" do
+  describe "Matrix#-" do
-    (@a - @b).should == Matrix[ [-3,-3], [-3,-3] ]
+    before :each do
-  end
+      @a = Matrix[ [1, 2], [3, 4] ]
+      @b = Matrix[ [4, 5], [6, 7] ]
+    end
 
-  it "returns an instance of Matrix" do
+    it "returns the result of subtracting the corresponding elements of other from self" do
-    (@a - @b).should be_kind_of(Matrix)
+      (@a - @b).should == Matrix[ [-3,-3], [-3,-3] ]
-  end
+    end
 
-  it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
+    it "returns an instance of Matrix" do
-    -> { @a - Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
+      (@a - @b).should be_kind_of(Matrix)
-  end
+    end
 
-  it "raises a ExceptionForMatrix::ErrOperationNotDefined if other is a Numeric Type" do
+    it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
-    -> { @a - 2            }.should raise_error(Matrix::ErrOperationNotDefined)
+      -> { @a - Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
-    -> { @a - 1.2          }.should raise_error(Matrix::ErrOperationNotDefined)
+    end
-    -> { @a - bignum_value }.should raise_error(Matrix::ErrOperationNotDefined)
-  end
 
-  it "raises a TypeError if other is of wrong type" do
+    it "raises a ExceptionForMatrix::ErrOperationNotDefined if other is a Numeric Type" do
-    -> { @a - nil        }.should raise_error(TypeError)
+      -> { @a - 2            }.should raise_error(Matrix::ErrOperationNotDefined)
-    -> { @a - "a"        }.should raise_error(TypeError)
+      -> { @a - 1.2          }.should raise_error(Matrix::ErrOperationNotDefined)
-    -> { @a - [ [1, 2] ] }.should raise_error(TypeError)
+      -> { @a - bignum_value }.should raise_error(Matrix::ErrOperationNotDefined)
-    -> { @a - Object.new }.should raise_error(TypeError)
+    end
-  end
 
-  describe "for a subclass of Matrix" do
+    it "raises a TypeError if other is of wrong type" do
-    it "returns an instance of that subclass" do
+      -> { @a - nil        }.should raise_error(TypeError)
-      m = MatrixSub.ins
+      -> { @a - "a"        }.should raise_error(TypeError)
-      (m-m).should be_an_instance_of(MatrixSub)
+      -> { @a - [ [1, 2] ] }.should raise_error(TypeError)
+      -> { @a - Object.new }.should raise_error(TypeError)
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        m = MatrixSub.ins
+        (m-m).should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/multiply_spec.rb

@@ -1,68 +1,71 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#*" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'fixtures/classes'
-    @a = Matrix[ [1, 2], [3, 4] ]
+  require 'matrix'
-    @b = Matrix[ [4, 5], [6, 7] ]
-  end
 
-  it "returns the result of multiplying the corresponding elements of self and a Matrix" do
+  describe "Matrix#*" do
-    (@a * @b).should == Matrix[ [16,19], [36,43] ]
+    before :each do
-  end
+      @a = Matrix[ [1, 2], [3, 4] ]
+      @b = Matrix[ [4, 5], [6, 7] ]
+    end
 
-  it "returns the result of multiplying the corresponding elements of self and a Vector" do
+    it "returns the result of multiplying the corresponding elements of self and a Matrix" do
-    (@a * Vector[1,2]).should == Vector[5, 11]
+      (@a * @b).should == Matrix[ [16,19], [36,43] ]
-  end
+    end
 
-  it "returns the result of multiplying the elements of self and a Fixnum" do
+    it "returns the result of multiplying the corresponding elements of self and a Vector" do
-    (@a * 2).should == Matrix[ [2, 4], [6, 8] ]
+      (@a * Vector[1,2]).should == Vector[5, 11]
-  end
+    end
 
-  it "returns the result of multiplying the elements of self and a Bignum" do
+    it "returns the result of multiplying the elements of self and a Fixnum" do
-    (@a * bignum_value).should == Matrix[
+      (@a * 2).should == Matrix[ [2, 4], [6, 8] ]
-      [9223372036854775808, 18446744073709551616],
+    end
-      [27670116110564327424, 36893488147419103232]
-    ]
-  end
 
-  it "returns the result of multiplying the elements of self and a Float" do
+    it "returns the result of multiplying the elements of self and a Bignum" do
-    (@a * 2.0).should == Matrix[ [2.0, 4.0], [6.0, 8.0] ]
+      (@a * bignum_value).should == Matrix[
-  end
+        [9223372036854775808, 18446744073709551616],
+        [27670116110564327424, 36893488147419103232]
+      ]
+    end
 
-  it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
+    it "returns the result of multiplying the elements of self and a Float" do
-    -> { @a * Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
+      (@a * 2.0).should == Matrix[ [2.0, 4.0], [6.0, 8.0] ]
-  end
+    end
 
-  it "returns a zero matrix if (nx0) * (0xn)" do
+    it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
-    (Matrix[[],[],[]] * Matrix.columns([[],[],[]])).should == Matrix.zero(3)
+      -> { @a * Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
-  end
+    end
 
-  it "returns an empty matrix if (0xn) * (nx0)" do
+    it "returns a zero matrix if (nx0) * (0xn)" do
-    (Matrix.columns([[],[],[]]) * Matrix[[],[],[]]).should == Matrix[]
+      (Matrix[[],[],[]] * Matrix.columns([[],[],[]])).should == Matrix.zero(3)
-  end
+    end
 
-  it "returns a mx0 matrix if (mxn) * (nx0)" do
+    it "returns an empty matrix if (0xn) * (nx0)" do
-    (Matrix[[1,2],[3,4],[5,6]] * Matrix[[],[]]).should == Matrix[[],[],[]]
+      (Matrix.columns([[],[],[]]) * Matrix[[],[],[]]).should == Matrix[]
-  end
+    end
 
-  it "returns a 0xm matrix if (0xm) * (mxn)" do
+    it "returns a mx0 matrix if (mxn) * (nx0)" do
-    (Matrix.columns([[], [], []]) * Matrix[[1,2],[3,4],[5,6]]).should == Matrix.columns([[],[]])
+      (Matrix[[1,2],[3,4],[5,6]] * Matrix[[],[]]).should == Matrix[[],[],[]]
-  end
+    end
 
-  it "raises a TypeError if other is of wrong type" do
+    it "returns a 0xm matrix if (0xm) * (mxn)" do
-    -> { @a * nil        }.should raise_error(TypeError)
+      (Matrix.columns([[], [], []]) * Matrix[[1,2],[3,4],[5,6]]).should == Matrix.columns([[],[]])
-    -> { @a * "a"        }.should raise_error(TypeError)
+    end
-    -> { @a * [ [1, 2] ] }.should raise_error(TypeError)
-    -> { @a * Object.new }.should raise_error(TypeError)
-  end
 
-  describe "for a subclass of Matrix" do
+    it "raises a TypeError if other is of wrong type" do
-    it "returns an instance of that subclass" do
+      -> { @a * nil        }.should raise_error(TypeError)
-      m = MatrixSub.ins
+      -> { @a * "a"        }.should raise_error(TypeError)
-      (m*m).should be_an_instance_of(MatrixSub)
+      -> { @a * [ [1, 2] ] }.should raise_error(TypeError)
-      (m*1).should be_an_instance_of(MatrixSub)
+      -> { @a * Object.new }.should raise_error(TypeError)
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        m = MatrixSub.ins
+        (m*m).should be_an_instance_of(MatrixSub)
+        (m*1).should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/new_spec.rb

@@ -1,8 +1,11 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.new" do
+ruby_version_is ""..."3.1" do
-  it "is private" do
+  require 'matrix'
-    Matrix.should have_private_method(:new)
+
+  describe "Matrix.new" do
+    it "is private" do
+      Matrix.should have_private_method(:new)
+    end
   end
 end

spec/ruby/library/matrix/normal_spec.rb

@@ -1,26 +1,29 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.normal?" do
+ruby_version_is ""..."3.1" do
-  # it "returns false for non normal matrices" do
+  require 'matrix'
-  #   Matrix[[0, 1], [1, 2]].should_not.normal?
-  # end
 
-  it "returns true for normal matrices" do
+  describe "Matrix.normal?" do
-    Matrix[[1, 1, 0], [0, 1, 1], [1, 0, 1]].should.normal?
+    # it "returns false for non normal matrices" do
-    Matrix[[0, Complex(0, 2)], [Complex(0, -2), 0]].should.normal?
+    #   Matrix[[0, 1], [1, 2]].should_not.normal?
-  end
+    # end
 
-  it "raises an error for rectangular matrices" do
+    it "returns true for normal matrices" do
-    [
+      Matrix[[1, 1, 0], [0, 1, 1], [1, 0, 1]].should.normal?
-      Matrix[[0], [0]],
+      Matrix[[0, Complex(0, 2)], [Complex(0, -2), 0]].should.normal?
-      Matrix[[0, 0]],
+    end
-      Matrix.empty(0, 2),
+
-      Matrix.empty(2, 0),
+    it "raises an error for rectangular matrices" do
-    ].each do |rectangular_matrix|
+      [
-      -> {
+        Matrix[[0], [0]],
-        rectangular_matrix.normal?
+        Matrix[[0, 0]],
-      }.should raise_error(Matrix::ErrDimensionMismatch)
+        Matrix.empty(0, 2),
+        Matrix.empty(2, 0),
+      ].each do |rectangular_matrix|
+        -> {
+          rectangular_matrix.normal?
+        }.should raise_error(Matrix::ErrDimensionMismatch)
+      end
     end
   end
 end

spec/ruby/library/matrix/orthogonal_spec.rb

@@ -1,26 +1,29 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.orthogonal?" do
+ruby_version_is ""..."3.1" do
-  it "returns false for non orthogonal matrices" do
+  require 'matrix'
-    Matrix[[0, 1], [1, 2]].should_not.orthogonal?
-    Matrix[[1, 1, 0], [0, 1, 1], [1, 0, 1]].should_not.orthogonal?
-  end
 
-  it "returns true for orthogonal matrices" do
+  describe "Matrix.orthogonal?" do
-    Matrix[[0, 1], [1, 0]].should.orthogonal?
+    it "returns false for non orthogonal matrices" do
-  end
+      Matrix[[0, 1], [1, 2]].should_not.orthogonal?
+      Matrix[[1, 1, 0], [0, 1, 1], [1, 0, 1]].should_not.orthogonal?
+    end
 
-  it "raises an error for rectangular matrices" do
+    it "returns true for orthogonal matrices" do
-    [
+      Matrix[[0, 1], [1, 0]].should.orthogonal?
-      Matrix[[0], [0]],
+    end
-      Matrix[[0, 0]],
+
-      Matrix.empty(0, 2),
+    it "raises an error for rectangular matrices" do
-      Matrix.empty(2, 0),
+      [
-    ].each do |rectangular_matrix|
+        Matrix[[0], [0]],
-      -> {
+        Matrix[[0, 0]],
-        rectangular_matrix.orthogonal?
+        Matrix.empty(0, 2),
-      }.should raise_error(Matrix::ErrDimensionMismatch)
+        Matrix.empty(2, 0),
+      ].each do |rectangular_matrix|
+        -> {
+          rectangular_matrix.orthogonal?
+        }.should raise_error(Matrix::ErrDimensionMismatch)
+      end
     end
   end
 end

spec/ruby/library/matrix/permutation_spec.rb

@@ -1,32 +1,35 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#permutation?" do
+ruby_version_is ""..."3.1" do
-  it "returns true for a permutation Matrix" do
+  require 'matrix'
-    Matrix[[0, 1, 0], [0, 0, 1], [1, 0, 0]].permutation?.should be_true
-  end
 
-  it "returns false for a non permutation square Matrix" do
+  describe "Matrix#permutation?" do
-    Matrix[[0, 1], [0, 0]].permutation?.should be_false
+    it "returns true for a permutation Matrix" do
-    Matrix[[-1, 0], [0, -1]].permutation?.should be_false
+      Matrix[[0, 1, 0], [0, 0, 1], [1, 0, 0]].permutation?.should be_true
-    Matrix[[1, 0], [1, 0]].permutation?.should be_false
+    end
-    Matrix[[1, 0], [1, 1]].permutation?.should be_false
-  end
 
-  it "returns true for an empty 0x0 matrix" do
+    it "returns false for a non permutation square Matrix" do
-    Matrix.empty(0,0).permutation?.should be_true
+      Matrix[[0, 1], [0, 0]].permutation?.should be_false
-  end
+      Matrix[[-1, 0], [0, -1]].permutation?.should be_false
+      Matrix[[1, 0], [1, 0]].permutation?.should be_false
+      Matrix[[1, 0], [1, 1]].permutation?.should be_false
+    end
 
-  it "raises an error for rectangular matrices" do
+    it "returns true for an empty 0x0 matrix" do
-    [
+      Matrix.empty(0,0).permutation?.should be_true
-      Matrix[[0], [0]],
+    end
-      Matrix[[0, 0]],
+
-      Matrix.empty(0, 2),
+    it "raises an error for rectangular matrices" do
-      Matrix.empty(2, 0),
+      [
-    ].each do |rectangular_matrix|
+        Matrix[[0], [0]],
-      -> {
+        Matrix[[0, 0]],
-        rectangular_matrix.permutation?
+        Matrix.empty(0, 2),
-      }.should raise_error(Matrix::ErrDimensionMismatch)
+        Matrix.empty(2, 0),
+      ].each do |rectangular_matrix|
+        -> {
+          rectangular_matrix.permutation?
+        }.should raise_error(Matrix::ErrDimensionMismatch)
+      end
     end
   end
 end

spec/ruby/library/matrix/plus_spec.rb

@@ -1,42 +1,45 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#+" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'fixtures/classes'
-    @a = Matrix[ [1,2], [3,4] ]
+  require 'matrix'
-    @b = Matrix[ [4,5], [6,7] ]
-  end
 
-  it "returns the result of adding the corresponding elements of self and other" do
+  describe "Matrix#+" do
-    (@a + @b).should == Matrix[ [5,7], [9,11] ]
+    before :each do
-  end
+      @a = Matrix[ [1,2], [3,4] ]
+      @b = Matrix[ [4,5], [6,7] ]
+    end
 
-  it "returns an instance of Matrix" do
+    it "returns the result of adding the corresponding elements of self and other" do
-    (@a + @b).should be_kind_of(Matrix)
+      (@a + @b).should == Matrix[ [5,7], [9,11] ]
-  end
+    end
 
-  it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
+    it "returns an instance of Matrix" do
-    -> { @a + Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
+      (@a + @b).should be_kind_of(Matrix)
-  end
+    end
 
-  it "raises a ExceptionForMatrix::ErrOperationNotDefined if other is a Numeric Type" do
+    it "raises a Matrix::ErrDimensionMismatch if the matrices are different sizes" do
-    -> { @a + 2            }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
+      -> { @a + Matrix[ [1] ] }.should raise_error(Matrix::ErrDimensionMismatch)
-    -> { @a + 1.2          }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
+    end
-    -> { @a + bignum_value }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
-  end
 
-  it "raises a TypeError if other is of wrong type" do
+    it "raises a ExceptionForMatrix::ErrOperationNotDefined if other is a Numeric Type" do
-    -> { @a + nil        }.should raise_error(TypeError)
+      -> { @a + 2            }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
-    -> { @a + "a"        }.should raise_error(TypeError)
+      -> { @a + 1.2          }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
-    -> { @a + [ [1, 2] ] }.should raise_error(TypeError)
+      -> { @a + bignum_value }.should raise_error(ExceptionForMatrix::ErrOperationNotDefined)
-    -> { @a + Object.new }.should raise_error(TypeError)
+    end
-  end
 
-  describe "for a subclass of Matrix" do
+    it "raises a TypeError if other is of wrong type" do
-    it "returns an instance of that subclass" do
+      -> { @a + nil        }.should raise_error(TypeError)
-      m = MatrixSub.ins
+      -> { @a + "a"        }.should raise_error(TypeError)
-      (m+m).should be_an_instance_of(MatrixSub)
+      -> { @a + [ [1, 2] ] }.should raise_error(TypeError)
+      -> { @a + Object.new }.should raise_error(TypeError)
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        m = MatrixSub.ins
+        (m+m).should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/rank_spec.rb

@@ -1,19 +1,22 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#rank" do
+ruby_version_is ""..."3.1" do
-  it "returns the rank of the Matrix" do
+  require 'matrix'
-    Matrix[ [7,6], [3,9] ].rank.should == 2
-  end
 
-  it "doesn't loop forever" do
+  describe "Matrix#rank" do
-    Matrix[ [1,2,3], [4,5,6], [7,8,9] ].rank.should == 2
+    it "returns the rank of the Matrix" do
-    Matrix[ [1, 2, 0, 3], [1, -2, 3, 0], [0, 0, 4, 8], [2, 4, 0, 6] ].rank.
+      Matrix[ [7,6], [3,9] ].rank.should == 2
-    should == 3
+    end
-  end
 
-  it "works for some easy rectangular matrices" do
+    it "doesn't loop forever" do
-    Matrix[[0,0],[0,0],[1,0]].rank.should == 1
+      Matrix[ [1,2,3], [4,5,6], [7,8,9] ].rank.should == 2
-    Matrix[[0,1],[0,0],[1,0]].rank.should == 2
+      Matrix[ [1, 2, 0, 3], [1, -2, 3, 0], [0, 0, 4, 8], [2, 4, 0, 6] ].rank.
+      should == 3
+    end
+
+    it "works for some easy rectangular matrices" do
+      Matrix[[0,0],[0,0],[1,0]].rank.should == 1
+      Matrix[[0,1],[0,0],[1,0]].rank.should == 2
+    end
   end
 end

spec/ruby/library/matrix/real_spec.rb

@@ -1,43 +1,46 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#real?" do
+ruby_version_is ""..."3.1" do
-  it "returns true for matrices with all real entries" do
+  require_relative 'fixtures/classes'
-    Matrix[ [1,   2], [3, 4] ].real?.should be_true
+  require 'matrix'
-    Matrix[ [1.9, 2], [3, 4] ].real?.should be_true
+
+  describe "Matrix#real?" do
+    it "returns true for matrices with all real entries" do
+      Matrix[ [1,   2], [3, 4] ].real?.should be_true
+      Matrix[ [1.9, 2], [3, 4] ].real?.should be_true
+    end
+
+    it "returns true for empty matrices" do
+      Matrix.empty.real?.should be_true
+    end
+
+    it "returns false if one element is a Complex" do
+      Matrix[ [Complex(1,1), 2], [3, 4] ].real?.should be_false
+    end
+
+    # Guard against the Mathn library
+    guard -> { !defined?(Math.rsqrt) } do
+      it "returns false if one element is a Complex whose imaginary part is 0" do
+        Matrix[ [Complex(1,0), 2], [3, 4] ].real?.should be_false
+      end
+    end
   end
 
-  it "returns true for empty matrices" do
+  describe "Matrix#real" do
-    Matrix.empty.real?.should be_true
+    it "returns a matrix with the real part of the elements of the receiver" do
-  end
+      Matrix[ [1,   2], [3, 4] ].real.should == Matrix[ [1,   2], [3, 4] ]
+      Matrix[ [1.9, Complex(1,1)], [Complex(-0.42, 0), 4] ].real.should == Matrix[ [1.9, 1], [-0.42, 4] ]
+    end
 
-  it "returns false if one element is a Complex" do
+    it "returns empty matrices on the same size if empty" do
-    Matrix[ [Complex(1,1), 2], [3, 4] ].real?.should be_false
+      Matrix.empty(0, 3).real.should == Matrix.empty(0, 3)
-  end
+      Matrix.empty(3, 0).real.should == Matrix.empty(3, 0)
+    end
 
-  # Guard against the Mathn library
+    describe "for a subclass of Matrix" do
-  guard -> { !defined?(Math.rsqrt) } do
+      it "returns an instance of that subclass" do
-    it "returns false if one element is a Complex whose imaginary part is 0" do
+        MatrixSub.ins.real.should be_an_instance_of(MatrixSub)
-      Matrix[ [Complex(1,0), 2], [3, 4] ].real?.should be_false
+      end
-    end
-  end
-end
-
-describe "Matrix#real" do
-  it "returns a matrix with the real part of the elements of the receiver" do
-    Matrix[ [1,   2], [3, 4] ].real.should == Matrix[ [1,   2], [3, 4] ]
-    Matrix[ [1.9, Complex(1,1)], [Complex(-0.42, 0), 4] ].real.should == Matrix[ [1.9, 1], [-0.42, 4] ]
-  end
-
-  it "returns empty matrices on the same size if empty" do
-    Matrix.empty(0, 3).real.should == Matrix.empty(0, 3)
-    Matrix.empty(3, 0).real.should == Matrix.empty(3, 0)
-  end
-
-  describe "for a subclass of Matrix" do
-    it "returns an instance of that subclass" do
-      MatrixSub.ins.real.should be_an_instance_of(MatrixSub)
     end
   end
 end

spec/ruby/library/matrix/rect_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/rectangular'
 
-describe "Matrix#rect" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_rectangular, :rect
+  require_relative 'shared/rectangular'
+
+  describe "Matrix#rect" do
+    it_behaves_like :matrix_rectangular, :rect
+  end
 end

spec/ruby/library/matrix/rectangular_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/rectangular'
 
-describe "Matrix#rectangular" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_rectangular, :rectangular
+  require_relative 'shared/rectangular'
+
+  describe "Matrix#rectangular" do
+    it_behaves_like :matrix_rectangular, :rectangular
+  end
 end

spec/ruby/library/matrix/regular_spec.rb

@@ -1,31 +1,34 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#regular?" do
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  it "returns false for singular matrices" do
+  describe "Matrix#regular?" do
-    m = Matrix[ [1,2,3], [3,4,3], [0,0,0] ]
-    m.regular?.should be_false
 
-    m = Matrix[ [1,2,9], [3,4,9], [1,2,9] ]
+    it "returns false for singular matrices" do
-    m.regular?.should be_false
+      m = Matrix[ [1,2,3], [3,4,3], [0,0,0] ]
-  end
+      m.regular?.should be_false
 
-  it "returns true if the Matrix is regular" do
+      m = Matrix[ [1,2,9], [3,4,9], [1,2,9] ]
-    Matrix[ [0,1], [1,0] ].regular?.should be_true
+      m.regular?.should be_false
-  end
+    end
 
-  it "returns true for an empty 0x0 matrix" do
+    it "returns true if the Matrix is regular" do
-    Matrix.empty(0,0).regular?.should be_true
+      Matrix[ [0,1], [1,0] ].regular?.should be_true
-  end
+    end
 
-  it "raises an error for rectangular matrices" do
+    it "returns true for an empty 0x0 matrix" do
-    -> {
+      Matrix.empty(0,0).regular?.should be_true
-      Matrix[[1], [2], [3]].regular?
+    end
-    }.should raise_error(Matrix::ErrDimensionMismatch)
 
-    -> {
+    it "raises an error for rectangular matrices" do
-      Matrix.empty(3,0).regular?
+      -> {
-    }.should raise_error(Matrix::ErrDimensionMismatch)
+        Matrix[[1], [2], [3]].regular?
+      }.should raise_error(Matrix::ErrDimensionMismatch)
+
+      -> {
+        Matrix.empty(3,0).regular?
+      }.should raise_error(Matrix::ErrDimensionMismatch)
+    end
   end
 end

spec/ruby/library/matrix/round_spec.rb

@@ -1,21 +1,24 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix#round" do
+ruby_version_is ""..."3.1" do
-  it "returns a matrix with all entries rounded" do
+  require_relative 'fixtures/classes'
-    Matrix[ [1,   2.34], [5.67, 8] ].round.should == Matrix[ [1, 2], [6, 8] ]
+  require 'matrix'
-    Matrix[ [1,   2.34], [5.67, 8] ].round(1).should == Matrix[ [1, 2.3], [5.7, 8] ]
-  end
 
-  it "returns empty matrices on the same size if empty" do
+  describe "Matrix#round" do
-    Matrix.empty(0, 3).round.should == Matrix.empty(0, 3)
+    it "returns a matrix with all entries rounded" do
-    Matrix.empty(3, 0).round(42).should == Matrix.empty(3, 0)
+      Matrix[ [1,   2.34], [5.67, 8] ].round.should == Matrix[ [1, 2], [6, 8] ]
-  end
+      Matrix[ [1,   2.34], [5.67, 8] ].round(1).should == Matrix[ [1, 2.3], [5.7, 8] ]
+    end
 
-  describe "for a subclass of Matrix" do
+    it "returns empty matrices on the same size if empty" do
-    it "returns an instance of that subclass" do
+      Matrix.empty(0, 3).round.should == Matrix.empty(0, 3)
-      MatrixSub.ins.round.should be_an_instance_of(MatrixSub)
+      Matrix.empty(3, 0).round(42).should == Matrix.empty(3, 0)
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.ins.round.should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/row_size_spec.rb

@@ -1,13 +1,16 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#row_size" do
+ruby_version_is ""..."3.1" do
-  it "returns the number rows" do
+  require 'matrix'
-    Matrix[ [1,2], [3, 4], [5, 6] ].row_size.should == 3
+
+  describe "Matrix#row_size" do
+    it "returns the number rows" do
+      Matrix[ [1,2], [3, 4], [5, 6] ].row_size.should == 3
+    end
+
+    it "returns the number rows even for some empty matrices" do
+      Matrix[ [], [], [] ].row_size.should == 3
+    end
+
   end
-
-  it "returns the number rows even for some empty matrices" do
-    Matrix[ [], [], [] ].row_size.should == 3
-  end
-
 end

spec/ruby/library/matrix/row_spec.rb

@@ -1,36 +1,39 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#row" do
+ruby_version_is ""..."3.1" do
-  before :all do
+  require 'matrix'
-    @m = Matrix[ [1, 2], [2, 3], [3, 4] ]
-  end
 
-  it "returns a Vector when called without a block" do
+  describe "Matrix#row" do
-    @m.row(0).should == Vector[1,2]
+    before :all do
-  end
+      @m = Matrix[ [1, 2], [2, 3], [3, 4] ]
+    end
 
-  it "yields the elements of the row when called with a block" do
+    it "returns a Vector when called without a block" do
-    a = []
+      @m.row(0).should == Vector[1,2]
-    @m.row(0) {|x| a << x}
+    end
-    a.should == [1,2]
-  end
 
-  it "counts backwards for negative argument" do
+    it "yields the elements of the row when called with a block" do
-    @m.row(-1).should == Vector[3, 4]
+      a = []
-  end
+      @m.row(0) {|x| a << x}
+      a.should == [1,2]
+    end
 
-  it "returns self when called with a block" do
+    it "counts backwards for negative argument" do
-    @m.row(0) { |x| x }.should equal(@m)
+      @m.row(-1).should == Vector[3, 4]
-  end
+    end
 
-  it "returns nil when out of bounds" do
+    it "returns self when called with a block" do
-    @m.row(3).should == nil
+      @m.row(0) { |x| x }.should equal(@m)
-    @m.row(-4).should == nil
+    end
-  end
 
-  it "never yields when out of bounds" do
+    it "returns nil when out of bounds" do
-    -> { @m.row(3){ raise } }.should_not raise_error
+      @m.row(3).should == nil
-    -> { @m.row(-4){ raise } }.should_not raise_error
+      @m.row(-4).should == nil
+    end
+
+    it "never yields when out of bounds" do
+      -> { @m.row(3){ raise } }.should_not raise_error
+      -> { @m.row(-4){ raise } }.should_not raise_error
+    end
   end
 end

spec/ruby/library/matrix/row_vector_spec.rb

@@ -1,24 +1,27 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix.row_vector" do
+ruby_version_is ""..."3.1" do
+  require_relative 'fixtures/classes'
+  require 'matrix'
 
-  it "returns a Matrix" do
+  describe "Matrix.row_vector" do
-    Matrix.row_vector([]).should be_an_instance_of(Matrix)
-  end
 
-  it "returns a single-row Matrix with the specified values" do
+    it "returns a Matrix" do
-    Matrix.row_vector([1,2]).should == Matrix[ [1,2] ]
+      Matrix.row_vector([]).should be_an_instance_of(Matrix)
-  end
+    end
 
-  it "returns a 1x0 matrix when called with an empty Array" do
+    it "returns a single-row Matrix with the specified values" do
-    Matrix.row_vector([]).should == Matrix[ [] ]
+      Matrix.row_vector([1,2]).should == Matrix[ [1,2] ]
-  end
+    end
 
-  describe "for a subclass of Matrix" do
+    it "returns a 1x0 matrix when called with an empty Array" do
-    it "returns an instance of that subclass" do
+      Matrix.row_vector([]).should == Matrix[ [] ]
-      MatrixSub.row_vector([1]).should be_an_instance_of(MatrixSub)
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.row_vector([1]).should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/row_vectors_spec.rb

@@ -1,26 +1,29 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#row_vectors" do
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  before :each do
+  describe "Matrix#row_vectors" do
-    @vectors = Matrix[ [1,2], [3,4] ].row_vectors
-  end
 
-  it "returns an Array" do
+    before :each do
-    Matrix[ [1,2], [3,4] ].row_vectors.should be_an_instance_of(Array)
+      @vectors = Matrix[ [1,2], [3,4] ].row_vectors
-  end
+    end
 
-  it "returns an Array of Vectors" do
+    it "returns an Array" do
-    @vectors.all? {|v| v.should be_an_instance_of(Vector)}
+      Matrix[ [1,2], [3,4] ].row_vectors.should be_an_instance_of(Array)
-  end
+    end
 
-  it "returns each row as a Vector" do
+    it "returns an Array of Vectors" do
-    @vectors.should == [Vector[1,2], Vector[3,4]]
+      @vectors.all? {|v| v.should be_an_instance_of(Vector)}
-  end
+    end
 
-  it "returns an empty Array for empty matrices" do
+    it "returns each row as a Vector" do
-    Matrix[].row_vectors.should == []
+      @vectors.should == [Vector[1,2], Vector[3,4]]
-    Matrix[ [] ].row_vectors.should == [ Vector[] ]
+    end
+
+    it "returns an empty Array for empty matrices" do
+      Matrix[].row_vectors.should == []
+      Matrix[ [] ].row_vectors.should == [ Vector[] ]
+    end
   end
 end

spec/ruby/library/matrix/rows_spec.rb

@@ -1,41 +1,44 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix.rows" do
+ruby_version_is ""..."3.1" do
-  before :each do
+  require_relative 'fixtures/classes'
-    @a = [1, 2]
+  require 'matrix'
-    @b = [3, 4]
-    @m = Matrix.rows([@a, @b])
-  end
 
-  it "returns a Matrix" do
+  describe "Matrix.rows" do
-    @m.should be_kind_of(Matrix)
+    before :each do
-  end
+      @a = [1, 2]
+      @b = [3, 4]
+      @m = Matrix.rows([@a, @b])
+    end
 
-  it "creates a matrix from argument rows" do
+    it "returns a Matrix" do
-    @m.row(0).to_a.should == @a
+      @m.should be_kind_of(Matrix)
-    @m.row(1).to_a.should == @b
+    end
-  end
 
-  it "copies the original rows by default" do
+    it "creates a matrix from argument rows" do
-    @a << 3
+      @m.row(0).to_a.should == @a
-    @b << 6
+      @m.row(1).to_a.should == @b
-    @m.row(0).should_not equal(@a)
+    end
-    @m.row(1).should_not equal(@b)
-  end
 
-  it "references the original rows if copy is false" do
+    it "copies the original rows by default" do
-    @m_ref = Matrix.rows([@a, @b], false)
+      @a << 3
-    @a << 3
+      @b << 6
-    @b << 6
+      @m.row(0).should_not equal(@a)
-    @m_ref.row(0).to_a.should == @a
+      @m.row(1).should_not equal(@b)
-    @m_ref.row(1).to_a.should == @b
+    end
-  end
 
-  describe "for a subclass of Matrix" do
+    it "references the original rows if copy is false" do
-    it "returns an instance of that subclass" do
+      @m_ref = Matrix.rows([@a, @b], false)
-      MatrixSub.rows([[0, 1], [0, 1]]).should be_an_instance_of(MatrixSub)
+      @a << 3
+      @b << 6
+      @m_ref.row(0).to_a.should == @a
+      @m_ref.row(1).to_a.should == @b
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.rows([[0, 1], [0, 1]]).should be_an_instance_of(MatrixSub)
+      end
     end
   end
 end

spec/ruby/library/matrix/scalar/Fail_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar#Fail" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar#Fail" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar/Raise_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar#Raise" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar#Raise" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar/divide_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar#/" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar#/" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar/exponent_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar#**" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar#**" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar/included_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar.included" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar.included" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar/initialize_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar#initialize" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar#initialize" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar/minus_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar#-" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar#-" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar/multiply_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar#*" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar#*" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar/plus_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::Scalar#+" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix::Scalar#+" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/scalar_spec.rb

@@ -1,65 +1,68 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.scalar" do
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  before :each do
+  describe "Matrix.scalar" do
-    @side = 3
-    @value = 8
-    @a = Matrix.scalar(@side, @value)
-  end
 
-  it "returns a Matrix" do
+    before :each do
-    @a.should be_kind_of(Matrix)
+      @side = 3
-  end
+      @value = 8
-
+      @a = Matrix.scalar(@side, @value)
-  it "returns a n x n matrix" do
-    @a.row_size.should == @side
-    @a.column_size.should == @side
-  end
-
-  it "initializes diagonal to value" do
-    (0...@a.row_size).each do |i|
-      @a[i, i].should == @value
     end
-  end
 
-  it "initializes all non-diagonal values to 0" do
+    it "returns a Matrix" do
-    (0...@a.row_size).each do |i|
+      @a.should be_kind_of(Matrix)
-      (0...@a.column_size).each do |j|
+    end
-        if i != j
+
-          @a[i, j].should == 0
+    it "returns a n x n matrix" do
+      @a.row_size.should == @side
+      @a.column_size.should == @side
+    end
+
+    it "initializes diagonal to value" do
+      (0...@a.row_size).each do |i|
+        @a[i, i].should == @value
+      end
+    end
+
+    it "initializes all non-diagonal values to 0" do
+      (0...@a.row_size).each do |i|
+        (0...@a.column_size).each do |j|
+          if i != j
+            @a[i, j].should == 0
+          end
         end
       end
     end
-  end
 
-  before :each do
+    before :each do
-    @side = 3
+      @side = 3
-    @value = 8
+      @value = 8
-    @a = Matrix.scalar(@side, @value)
+      @a = Matrix.scalar(@side, @value)
-  end
-
-  it "returns a Matrix" do
-    @a.should be_kind_of(Matrix)
-  end
-
-  it "returns a square matrix, where the first argument specifies the side of the square" do
-    @a.row_size.should == @side
-    @a.column_size.should == @side
-  end
-
-  it "puts the second argument in all diagonal values" do
-    (0...@a.row_size).each do |i|
-      @a[i, i].should == @value
     end
-  end
 
-  it "fills all values not on the main diagonal with 0" do
+    it "returns a Matrix" do
-    (0...@a.row_size).each do |i|
+      @a.should be_kind_of(Matrix)
-      (0...@a.column_size).each do |j|
+    end
-        if i != j
+
-          @a[i, j].should == 0
+    it "returns a square matrix, where the first argument specifies the side of the square" do
+      @a.row_size.should == @side
+      @a.column_size.should == @side
+    end
+
+    it "puts the second argument in all diagonal values" do
+      (0...@a.row_size).each do |i|
+        @a[i, i].should == @value
+      end
+    end
+
+    it "fills all values not on the main diagonal with 0" do
+      (0...@a.row_size).each do |i|
+        (0...@a.column_size).each do |j|
+          if i != j
+            @a[i, j].should == 0
+          end
         end
       end
     end

spec/ruby/library/matrix/singular_spec.rb

@@ -1,31 +1,34 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#singular?" do
+ruby_version_is ""..."3.1" do
-  it "returns true for singular matrices" do
+  require 'matrix'
-    m = Matrix[ [1,2,3], [3,4,3], [0,0,0] ]
+
-    m.singular?.should be_true
+  describe "Matrix#singular?" do
+    it "returns true for singular matrices" do
+      m = Matrix[ [1,2,3], [3,4,3], [0,0,0] ]
+      m.singular?.should be_true
+
+      m = Matrix[ [1,2,9], [3,4,9], [1,2,9] ]
+      m.singular?.should be_true
+    end
+
+    it "returns false if the Matrix is regular" do
+      Matrix[ [0,1], [1,0] ].singular?.should be_false
+    end
+
+    it "returns false for an empty 0x0 matrix" do
+      Matrix.empty(0,0).singular?.should be_false
+    end
+
+    it "raises an error for rectangular matrices" do
+      -> {
+        Matrix[[1], [2], [3]].singular?
+      }.should raise_error(Matrix::ErrDimensionMismatch)
+
+      -> {
+        Matrix.empty(3,0).singular?
+      }.should raise_error(Matrix::ErrDimensionMismatch)
+    end
 
-    m = Matrix[ [1,2,9], [3,4,9], [1,2,9] ]
-    m.singular?.should be_true
   end
-
-  it "returns false if the Matrix is regular" do
-    Matrix[ [0,1], [1,0] ].singular?.should be_false
-  end
-
-  it "returns false for an empty 0x0 matrix" do
-    Matrix.empty(0,0).singular?.should be_false
-  end
-
-  it "raises an error for rectangular matrices" do
-    -> {
-      Matrix[[1], [2], [3]].singular?
-    }.should raise_error(Matrix::ErrDimensionMismatch)
-
-    -> {
-      Matrix.empty(3,0).singular?
-    }.should raise_error(Matrix::ErrDimensionMismatch)
-  end
-
 end

spec/ruby/library/matrix/square_spec.rb

@@ -1,28 +1,31 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#square?" do
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  it "returns true when the Matrix is square" do
+  describe "Matrix#square?" do
-    Matrix[ [1,2], [2,4] ].square?.should be_true
-    Matrix[ [100,3,5], [9.5, 4.9, 8], [2,0,77] ].square?.should be_true
-  end
 
-  it "returns true when the Matrix has only one element" do
+    it "returns true when the Matrix is square" do
-    Matrix[ [9] ].square?.should be_true
+      Matrix[ [1,2], [2,4] ].square?.should be_true
-  end
+      Matrix[ [100,3,5], [9.5, 4.9, 8], [2,0,77] ].square?.should be_true
+    end
 
-  it "returns false when the Matrix is rectangular" do
+    it "returns true when the Matrix has only one element" do
-    Matrix[ [1, 2] ].square?.should be_false
+      Matrix[ [9] ].square?.should be_true
-  end
+    end
 
-  it "returns false when the Matrix is rectangular" do
+    it "returns false when the Matrix is rectangular" do
-    Matrix[ [1], [2] ].square?.should be_false
+      Matrix[ [1, 2] ].square?.should be_false
-  end
+    end
 
-  it "returns handles empty matrices" do
+    it "returns false when the Matrix is rectangular" do
-    Matrix[].square?.should be_true
+      Matrix[ [1], [2] ].square?.should be_false
-    Matrix[[]].square?.should be_false
+    end
-    Matrix.columns([[]]).square?.should be_false
+
+    it "returns handles empty matrices" do
+      Matrix[].square?.should be_true
+      Matrix[[]].square?.should be_false
+      Matrix.columns([[]]).square?.should be_false
+    end
   end
 end

spec/ruby/library/matrix/symmetric_spec.rb

@@ -1,29 +1,32 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.symmetric?" do
+ruby_version_is ""..."3.1" do
-  it "returns true for a symmetric Matrix" do
+  require 'matrix'
-    Matrix[[1, 2, Complex(0, 3)], [2, 4, 5], [Complex(0, 3), 5, 6]].symmetric?.should be_true
-  end
 
-  it "returns true for a 0x0 empty matrix" do
+  describe "Matrix.symmetric?" do
-    Matrix.empty.symmetric?.should be_true
+    it "returns true for a symmetric Matrix" do
-  end
+      Matrix[[1, 2, Complex(0, 3)], [2, 4, 5], [Complex(0, 3), 5, 6]].symmetric?.should be_true
+    end
 
-  it "returns false for an asymmetric Matrix" do
+    it "returns true for a 0x0 empty matrix" do
-    Matrix[[1, 2],[-2, 1]].symmetric?.should be_false
+      Matrix.empty.symmetric?.should be_true
-  end
+    end
 
-  it "raises an error for rectangular matrices" do
+    it "returns false for an asymmetric Matrix" do
-    [
+      Matrix[[1, 2],[-2, 1]].symmetric?.should be_false
-      Matrix[[0], [0]],
+    end
-      Matrix[[0, 0]],
+
-      Matrix.empty(0, 2),
+    it "raises an error for rectangular matrices" do
-      Matrix.empty(2, 0),
+      [
-    ].each do |rectangular_matrix|
+        Matrix[[0], [0]],
-      -> {
+        Matrix[[0, 0]],
-        rectangular_matrix.symmetric?
+        Matrix.empty(0, 2),
-      }.should raise_error(Matrix::ErrDimensionMismatch)
+        Matrix.empty(2, 0),
+      ].each do |rectangular_matrix|
+        -> {
+          rectangular_matrix.symmetric?
+        }.should raise_error(Matrix::ErrDimensionMismatch)
+      end
     end
   end
 end

spec/ruby/library/matrix/t_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/transpose'
 
-describe "Matrix#transpose" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_transpose, :t
+  require_relative 'shared/transpose'
+
+  describe "Matrix#transpose" do
+    it_behaves_like :matrix_transpose, :t
+  end
 end

spec/ruby/library/matrix/to_a_spec.rb

@@ -1,11 +1,14 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#to_a" do
+ruby_version_is ""..."3.1" do
-  it "returns the array of arrays that describe the rows of the matrix" do
+  require 'matrix'
-    Matrix[].to_a.should == []
+
-    Matrix[[]].to_a.should == [[]]
+  describe "Matrix#to_a" do
-    Matrix[[1]].to_a.should == [[1]]
+    it "returns the array of arrays that describe the rows of the matrix" do
-    Matrix[[1, 2], [3, 4]].to_a.should == [[1, 2],[3, 4]]
+      Matrix[].to_a.should == []
+      Matrix[[]].to_a.should == [[]]
+      Matrix[[1]].to_a.should == [[1]]
+      Matrix[[1, 2], [3, 4]].to_a.should == [[1, 2],[3, 4]]
+    end
   end
 end

spec/ruby/library/matrix/to_s_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#to_s" do
+ruby_version_is ""..."3.1" do
-  it "needs to be reviewed for spec completeness"
+  require 'matrix'
+
+  describe "Matrix#to_s" do
+    it "needs to be reviewed for spec completeness"
+  end
 end

spec/ruby/library/matrix/tr_spec.rb

@@ -1,7 +1,10 @@
 require_relative '../../spec_helper'
-require_relative 'shared/trace'
-require 'matrix'
 
-describe "Matrix#tr" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :trace, :tr
+  require_relative 'shared/trace'
+  require 'matrix'
+
+  describe "Matrix#tr" do
+    it_behaves_like :trace, :tr
+  end
 end

spec/ruby/library/matrix/trace_spec.rb

@@ -1,7 +1,10 @@
 require_relative '../../spec_helper'
-require_relative 'shared/trace'
-require 'matrix'
 
-describe "Matrix#trace" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :trace, :trace
+  require_relative 'shared/trace'
+  require 'matrix'
+
+  describe "Matrix#trace" do
+    it_behaves_like :trace, :trace
+  end
 end

spec/ruby/library/matrix/transpose_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/transpose'
 
-describe "Matrix#transpose" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_transpose, :transpose
+  require_relative 'shared/transpose'
+
+  describe "Matrix#transpose" do
+    it_behaves_like :matrix_transpose, :transpose
+  end
 end

spec/ruby/library/matrix/unit_spec.rb

@@ -1,6 +1,9 @@
 require_relative '../../spec_helper'
-require_relative 'shared/identity'
 
-describe "Matrix.unit" do
+ruby_version_is ""..."3.1" do
-  it_behaves_like :matrix_identity, :unit
+  require_relative 'shared/identity'
+
+  describe "Matrix.unit" do
+    it_behaves_like :matrix_identity, :unit
+  end
 end

spec/ruby/library/matrix/unitary_spec.rb

@@ -1,33 +1,36 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.unitary?" do
+ruby_version_is ""..."3.1" do
-  it "returns false for non unitary matrices" do
+  require 'matrix'
-    Matrix[[0, 1], [1, 2]].should_not.unitary?
-    Matrix[[0, Complex(0, 2)], [Complex(0, 2), 0]].should_not.unitary?
-    Matrix[[1, 1, 0], [0, 1, 1], [1, 0, 1]].should_not.unitary?
-  end
 
-  it "returns true for unitary matrices" do
+  describe "Matrix.unitary?" do
-    Matrix[[0, Complex(0, 1)], [Complex(0, 1), 0]].should.unitary?
+    it "returns false for non unitary matrices" do
-  end
+      Matrix[[0, 1], [1, 2]].should_not.unitary?
-
+      Matrix[[0, Complex(0, 2)], [Complex(0, 2), 0]].should_not.unitary?
-  version_is((Matrix::const_defined?(:VERSION) ? Matrix::VERSION : "0.1.0"), "0.3.0") do
+      Matrix[[1, 1, 0], [0, 1, 1], [1, 0, 1]].should_not.unitary?
-    it "returns true for unitary matrices with a Complex and a negative #imag" do
-      Matrix[[0, Complex(0, 1)], [Complex(0, -1), 0]].should.unitary?
     end
-  end
 
-  it "raises an error for rectangular matrices" do
+    it "returns true for unitary matrices" do
-    [
+      Matrix[[0, Complex(0, 1)], [Complex(0, 1), 0]].should.unitary?
-      Matrix[[0], [0]],
+    end
-      Matrix[[0, 0]],
+
-      Matrix.empty(0, 2),
+    version_is((Matrix::const_defined?(:VERSION) ? Matrix::VERSION : "0.1.0"), "0.3.0") do
-      Matrix.empty(2, 0),
+      it "returns true for unitary matrices with a Complex and a negative #imag" do
-    ].each do |rectangular_matrix|
+        Matrix[[0, Complex(0, 1)], [Complex(0, -1), 0]].should.unitary?
-      -> {
+      end
-        rectangular_matrix.unitary?
+    end
-      }.should raise_error(Matrix::ErrDimensionMismatch)
+
+    it "raises an error for rectangular matrices" do
+      [
+        Matrix[[0], [0]],
+        Matrix[[0, 0]],
+        Matrix.empty(0, 2),
+        Matrix.empty(2, 0),
+      ].each do |rectangular_matrix|
+        -> {
+          rectangular_matrix.unitary?
+        }.should raise_error(Matrix::ErrDimensionMismatch)
+      end
     end
   end
 end

spec/ruby/library/matrix/upper_triangular_spec.rb

@@ -1,24 +1,27 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix.upper_triangular?" do
+ruby_version_is ""..."3.1" do
-  it "returns true for an upper triangular Matrix" do
+  require 'matrix'
-    Matrix[[1, 2, 3], [0, 2, 3], [0, 0, 3]].upper_triangular?.should be_true
-    Matrix.diagonal([1, 2, 3]).upper_triangular?.should be_true
-    Matrix[[1, 2], [0, 2], [0, 0], [0, 0]].upper_triangular?.should be_true
-    Matrix[[1, 2, 3, 4], [0, 2, 3, 4]].upper_triangular?.should be_true
-  end
 
-  it "returns false for a non upper triangular square Matrix" do
+  describe "Matrix.upper_triangular?" do
-    Matrix[[0, 0], [1, 0]].upper_triangular?.should be_false
+    it "returns true for an upper triangular Matrix" do
-    Matrix[[1, 2, 3], [1, 2, 3], [1, 2, 3]].upper_triangular?.should be_false
+      Matrix[[1, 2, 3], [0, 2, 3], [0, 0, 3]].upper_triangular?.should be_true
-    Matrix[[0, 0], [0, 0], [0, 0], [0, 1]].upper_triangular?.should be_false
+      Matrix.diagonal([1, 2, 3]).upper_triangular?.should be_true
-    Matrix[[0, 0, 0, 0], [1, 0, 0, 0]].upper_triangular?.should be_false
+      Matrix[[1, 2], [0, 2], [0, 0], [0, 0]].upper_triangular?.should be_true
-  end
+      Matrix[[1, 2, 3, 4], [0, 2, 3, 4]].upper_triangular?.should be_true
+    end
 
-  it "returns true for an empty matrix" do
+    it "returns false for a non upper triangular square Matrix" do
-    Matrix.empty(3,0).upper_triangular?.should be_true
+      Matrix[[0, 0], [1, 0]].upper_triangular?.should be_false
-    Matrix.empty(0,3).upper_triangular?.should be_true
+      Matrix[[1, 2, 3], [1, 2, 3], [1, 2, 3]].upper_triangular?.should be_false
-    Matrix.empty(0,0).upper_triangular?.should be_true
+      Matrix[[0, 0], [0, 0], [0, 0], [0, 1]].upper_triangular?.should be_false
+      Matrix[[0, 0, 0, 0], [1, 0, 0, 0]].upper_triangular?.should be_false
+    end
+
+    it "returns true for an empty matrix" do
+      Matrix.empty(3,0).upper_triangular?.should be_true
+      Matrix.empty(0,3).upper_triangular?.should be_true
+      Matrix.empty(0,0).upper_triangular?.should be_true
+    end
   end
 end

spec/ruby/library/matrix/vector/cross_product_spec.rb

@@ -1,14 +1,17 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Vector#cross_product" do
+ruby_version_is ""..."3.1" do
-  it "returns the cross product of a vector" do
+  require 'matrix'
-    Vector[1, 2, 3].cross_product(Vector[0, -4, 5]).should == Vector[22, -5, -4]
-  end
 
-  it "raises an error unless both vectors have dimension 3" do
+  describe "Vector#cross_product" do
-    -> {
+    it "returns the cross product of a vector" do
-      Vector[1, 2, 3].cross_product(Vector[0, -4])
+      Vector[1, 2, 3].cross_product(Vector[0, -4, 5]).should == Vector[22, -5, -4]
-    }.should raise_error(Vector::ErrDimensionMismatch)
+    end
+
+    it "raises an error unless both vectors have dimension 3" do
+      -> {
+        Vector[1, 2, 3].cross_product(Vector[0, -4])
+      }.should raise_error(Vector::ErrDimensionMismatch)
+    end
   end
 end

spec/ruby/library/matrix/vector/each2_spec.rb

@@ -1,49 +1,52 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Vector.each2" do
+ruby_version_is ""..."3.1" do
-  before :all do
+  require 'matrix'
-    @v = Vector[1, 2, 3]
-    @v2 = Vector[4, 5, 6]
-  end
 
-  it "requires one argument" do
+  describe "Vector.each2" do
-    -> { @v.each2(@v2, @v2){} }.should raise_error(ArgumentError)
+    before :all do
-    -> { @v.each2(){} }.should raise_error(ArgumentError)
+      @v = Vector[1, 2, 3]
-  end
+      @v2 = Vector[4, 5, 6]
-
-  describe "given one argument" do
-    it "accepts an Array argument" do
-      a = []
-      @v.each2([7, 8, 9]){|x, y| a << x << y}
-      a.should == [1, 7, 2, 8, 3, 9]
     end
 
-    it "raises a DimensionMismatch error if the Vector size is different" do
+    it "requires one argument" do
-      -> { @v.each2(Vector[1,2]){}     }.should raise_error(Vector::ErrDimensionMismatch)
+      -> { @v.each2(@v2, @v2){} }.should raise_error(ArgumentError)
-      -> { @v.each2(Vector[1,2,3,4]){} }.should raise_error(Vector::ErrDimensionMismatch)
+      -> { @v.each2(){} }.should raise_error(ArgumentError)
     end
 
-    it "yields arguments in sequence" do
+    describe "given one argument" do
-      a = []
+      it "accepts an Array argument" do
-      @v.each2(@v2){|first, second| a << [first, second]}
+        a = []
-      a.should == [[1, 4], [2, 5], [3, 6]]
+        @v.each2([7, 8, 9]){|x, y| a << x << y}
-    end
+        a.should == [1, 7, 2, 8, 3, 9]
+      end
 
-    it "yield arguments in pairs" do
+      it "raises a DimensionMismatch error if the Vector size is different" do
-      a = []
+        -> { @v.each2(Vector[1,2]){}     }.should raise_error(Vector::ErrDimensionMismatch)
-      @v.each2(@v2){|*pair| a << pair}
+        -> { @v.each2(Vector[1,2,3,4]){} }.should raise_error(Vector::ErrDimensionMismatch)
-      a.should == [[1, 4], [2, 5], [3, 6]]
+      end
-    end
 
-    it "returns self when given a block" do
+      it "yields arguments in sequence" do
-      @v.each2(@v2){}.should equal(@v)
+        a = []
-    end
+        @v.each2(@v2){|first, second| a << [first, second]}
+        a.should == [[1, 4], [2, 5], [3, 6]]
+      end
 
-    it "returns an enumerator if no block given" do
+      it "yield arguments in pairs" do
-      enum = @v.each2(@v2)
+        a = []
-      enum.should be_an_instance_of(Enumerator)
+        @v.each2(@v2){|*pair| a << pair}
-      enum.to_a.should == [[1, 4], [2, 5], [3, 6]]
+        a.should == [[1, 4], [2, 5], [3, 6]]
+      end
+
+      it "returns self when given a block" do
+        @v.each2(@v2){}.should equal(@v)
+      end
+
+      it "returns an enumerator if no block given" do
+        enum = @v.each2(@v2)
+        enum.should be_an_instance_of(Enumerator)
+        enum.to_a.should == [[1, 4], [2, 5], [3, 6]]
+      end
     end
   end
 end

spec/ruby/library/matrix/vector/eql_spec.rb

@@ -1,16 +1,19 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Vector#eql?" do
+ruby_version_is ""..."3.1" do
-  before do
+  require 'matrix'
-    @vector = Vector[1, 2, 3, 4, 5]
-  end
 
-  it "returns true for self" do
+  describe "Vector#eql?" do
-    @vector.eql?(@vector).should be_true
+    before do
-  end
+      @vector = Vector[1, 2, 3, 4, 5]
+    end
 
-  it "returns false when there are a pair corresponding elements which are not equal in the sense of Kernel#eql?" do
+    it "returns true for self" do
-    @vector.eql?(Vector[1, 2, 3, 4, 5.0]).should be_false
+      @vector.eql?(@vector).should be_true
+    end
+
+    it "returns false when there are a pair corresponding elements which are not equal in the sense of Kernel#eql?" do
+      @vector.eql?(Vector[1, 2, 3, 4, 5.0]).should be_false
+    end
   end
 end

spec/ruby/library/matrix/vector/inner_product_spec.rb

@@ -1,22 +1,25 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Vector#inner_product" do
+ruby_version_is ""..."3.1" do
-  it "returns the inner product of a vector" do
+  require 'matrix'
-    Vector[1, 2, 3].inner_product(Vector[0, -4, 5]).should == 7
-  end
 
-  it "returns 0 for empty vectors" do
+  describe "Vector#inner_product" do
-    Vector[].inner_product(Vector[]).should == 0
+    it "returns the inner product of a vector" do
-  end
+      Vector[1, 2, 3].inner_product(Vector[0, -4, 5]).should == 7
+    end
 
-  it "raises an error for mismatched vectors" do
+    it "returns 0 for empty vectors" do
-    -> {
+      Vector[].inner_product(Vector[]).should == 0
-      Vector[1, 2, 3].inner_product(Vector[0, -4])
+    end
-    }.should raise_error(Vector::ErrDimensionMismatch)
-  end
 
-  it "uses the conjugate of its argument" do
+    it "raises an error for mismatched vectors" do
-    Vector[Complex(1,2)].inner_product(Vector[Complex(3,4)]).should == Complex(11, 2)
+      -> {
+        Vector[1, 2, 3].inner_product(Vector[0, -4])
+      }.should raise_error(Vector::ErrDimensionMismatch)
+    end
+
+    it "uses the conjugate of its argument" do
+      Vector[Complex(1,2)].inner_product(Vector[Complex(3,4)]).should == Complex(11, 2)
+    end
   end
 end

spec/ruby/library/matrix/vector/normalize_spec.rb

@@ -1,18 +1,21 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Vector#normalize" do
+ruby_version_is ""..."3.1" do
-  it "returns a normalized copy of the vector" do
+  require 'matrix'
-    x = 0.2672612419124244
-    Vector[1, 2, 3].normalize.should == Vector[x, x * 2, x * 3]
-  end
 
-  it "raises an error for zero vectors" do
+  describe "Vector#normalize" do
-    -> {
+    it "returns a normalized copy of the vector" do
-      Vector[].normalize
+      x = 0.2672612419124244
-    }.should raise_error(Vector::ZeroVectorError)
+      Vector[1, 2, 3].normalize.should == Vector[x, x * 2, x * 3]
-    -> {
+    end
-      Vector[0, 0, 0].normalize
+
-    }.should raise_error(Vector::ZeroVectorError)
+    it "raises an error for zero vectors" do
+      -> {
+        Vector[].normalize
+      }.should raise_error(Vector::ZeroVectorError)
+      -> {
+        Vector[0, 0, 0].normalize
+      }.should raise_error(Vector::ZeroVectorError)
+    end
   end
 end

spec/ruby/library/matrix/zero_spec.rb

@@ -1,52 +1,55 @@
 require_relative '../../spec_helper'
-require_relative 'fixtures/classes'
-require 'matrix'
 
-describe "Matrix.zero" do
+ruby_version_is ""..."3.1" do
-  it "returns an object of type Matrix" do
+  require_relative 'fixtures/classes'
-    Matrix.zero(3).should be_kind_of(Matrix)
+  require 'matrix'
-  end
 
-  it "creates a n x n matrix" do
+  describe "Matrix.zero" do
-    m3 = Matrix.zero(3)
+    it "returns an object of type Matrix" do
-    m3.row_size.should == 3
+      Matrix.zero(3).should be_kind_of(Matrix)
-    m3.column_size.should == 3
+    end
 
-    m8 = Matrix.zero(8)
+    it "creates a n x n matrix" do
-    m8.row_size.should == 8
+      m3 = Matrix.zero(3)
-    m8.column_size.should == 8
+      m3.row_size.should == 3
-  end
+      m3.column_size.should == 3
 
-  it "initializes all cells to 0" do
+      m8 = Matrix.zero(8)
-    size = 10
+      m8.row_size.should == 8
-    m = Matrix.zero(size)
+      m8.column_size.should == 8
+    end
 
-    (0...size).each do |i|
+    it "initializes all cells to 0" do
-      (0...size).each do |j|
+      size = 10
-        m[i, j].should == 0
+      m = Matrix.zero(size)
+
+      (0...size).each do |i|
+        (0...size).each do |j|
+          m[i, j].should == 0
+        end
+      end
+    end
+
+    describe "for a subclass of Matrix" do
+      it "returns an instance of that subclass" do
+        MatrixSub.zero(3).should be_an_instance_of(MatrixSub)
       end
     end
   end
 
-  describe "for a subclass of Matrix" do
+  describe "Matrix.zero?" do
-    it "returns an instance of that subclass" do
+    it "returns true for empty matrices" do
-      MatrixSub.zero(3).should be_an_instance_of(MatrixSub)
+      Matrix.empty.should.zero?
+      Matrix.empty(3,0).should.zero?
+      Matrix.empty(0,3).should.zero?
+    end
+
+    it "returns true for matrices with zero entries" do
+      Matrix.zero(2,3).should.zero?
+    end
+
+    it "returns false for matrices with non zero entries" do
+      Matrix[[1]].should_not.zero?
     end
   end
 end
-
-describe "Matrix.zero?" do
-  it "returns true for empty matrices" do
-    Matrix.empty.should.zero?
-    Matrix.empty(3,0).should.zero?
-    Matrix.empty(0,3).should.zero?
-  end
-
-  it "returns true for matrices with zero entries" do
-    Matrix.zero(2,3).should.zero?
-  end
-
-  it "returns false for matrices with non zero entries" do
-    Matrix[[1]].should_not.zero?
-  end
-end

spec/ruby/library/net/FTPError_spec.rb

@@ -1,8 +1,11 @@
 require_relative '../../spec_helper'
-require 'net/ftp'
 
-describe "Net::FTPError" do
+ruby_version_is ""..."3.1" do
-  it "is an Exception" do
+  require 'net/ftp'
-    Net::FTPError.should < Exception
+
+  describe "Net::FTPError" do
+    it "is an Exception" do
+      Net::FTPError.should < Exception
+    end
   end
 end

spec/ruby/library/net/FTPPermError_spec.rb

@@ -1,12 +1,15 @@
 require_relative '../../spec_helper'
-require 'net/ftp'
 
-describe "Net::FTPPermError" do
+ruby_version_is ""..."3.1" do
-  it "is an Exception" do
+  require 'net/ftp'
-    Net::FTPPermError.should < Exception
-  end
 
-  it "is a subclass of Net::FTPError" do
+  describe "Net::FTPPermError" do
-    Net::FTPPermError.should < Net::FTPError
+    it "is an Exception" do
+      Net::FTPPermError.should < Exception
+    end
+
+    it "is a subclass of Net::FTPError" do
+      Net::FTPPermError.should < Net::FTPError
+    end
   end
 end

spec/ruby/library/net/FTPProtoError_spec.rb

@@ -1,12 +1,15 @@
 require_relative '../../spec_helper'
-require 'net/ftp'
 
-describe "Net::FTPProtoError" do
+ruby_version_is ""..."3.1" do
-  it "is an Exception" do
+  require 'net/ftp'
-    Net::FTPProtoError.should < Exception
-  end
 
-  it "is a subclass of Net::FTPError" do
+  describe "Net::FTPProtoError" do
-    Net::FTPPermError.should < Net::FTPError
+    it "is an Exception" do
+      Net::FTPProtoError.should < Exception
+    end
+
+    it "is a subclass of Net::FTPError" do
+      Net::FTPPermError.should < Net::FTPError
+    end
   end
 end