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

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

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

@@ -1,52 +1,55 @@
 require_relative '../../../spec_helper'
-require 'matrix'
 
-describe "Matrix::LUPDecomposition#solve" do
-  describe "for rectangular matrices" do
-    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
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-    describe "for non singular matrices" do
-      before :each do
-        @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
-        @lu = Matrix::LUPDecomposition.new(@a)
-      end
-
-      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]]
+  describe "Matrix::LUPDecomposition#solve" do
+    describe "for rectangular matrices" do
+      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(values)
-        }.should raise_error(Matrix::ErrDimensionMismatch)
+          lu.solve(a)
+        }.should raise_error(Matrix::ErrNotRegular)
       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
+      describe "for non singular matrices" do
+        before :each do
+          @a = Matrix[[7, 8, 9], [14, 46, 51], [28, 82, 163]]
+          @lu = Matrix::LUPDecomposition.new(@a)
+        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)
+        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)
+          }.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