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

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

spec/ruby/library/matrix/column_spec.rb

@@ -1,35 +1,38 @@
 require_relative '../../spec_helper'
-require 'matrix'
 
-describe "Matrix#column" do
-  before :all do
-    @m =  Matrix[[1,2,3], [2,3,4]]
-  end
+ruby_version_is ""..."3.1" do
+  require 'matrix'
 
-  it "returns a Vector when called without a block" do
-    @m.column(1).should == Vector[2,3]
-  end
+  describe "Matrix#column" do
+    before :all do
+      @m =  Matrix[[1,2,3], [2,3,4]]
+    end
 
-  it "yields each element in the column to the block" do
-    a = []
-    @m.column(1) {|n| a << n }
-    a.should == [2,3]
-  end
+    it "returns a Vector when called without a block" do
+      @m.column(1).should == Vector[2,3]
+    end
 
-  it "counts backwards for negative argument" do
-    @m.column(-1).should == Vector[3, 4]
-  end
+    it "yields each element in the column to the block" do
+      a = []
+      @m.column(1) {|n| a << n }
+      a.should == [2,3]
+    end
 
-  it "returns self when called with a block" do
-    @m.column(0) { |x| x }.should equal(@m)
-  end
+    it "counts backwards for negative argument" do
+      @m.column(-1).should == Vector[3, 4]
+    end
 
-  it "returns nil when out of bounds" do
-    @m.column(3).should == nil
-  end
+    it "returns self when called with a block" do
+      @m.column(0) { |x| x }.should equal(@m)
+    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
+    it "returns nil when out of bounds" do
+      @m.column(3).should == nil
+    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