1 files changed, 33 insertions, 0 deletions
diff --git a/spec/ruby/library/matrix/shared/equal_value.rb b/spec/ruby/library/matrix/shared/equal_value.rb
new file mode 100644
index 0000000000..e2102e823a
--- /dev/null
+++ b/spec/ruby/library/matrix/shared/equal_value.rb
@@ -0,0 +1,33 @@
+require File.expand_path('../../fixtures/classes', __FILE__)
+require 'matrix'
+
+describe :equal, shared: true do
+  before do
+    @matrix = Matrix[ [1, 2, 3, 4, 5], [2, 3, 4, 5, 6] ]
+  end
+
+  it "returns true for self" do
+    @matrix.send(@method, @matrix).should be_true
+  end
+
+  it "returns true for equal matrices" do
+    @matrix.send(@method, Matrix[ [1, 2, 3, 4, 5], [2, 3, 4, 5, 6] ]).should be_true
+  end
+
+  it "returns false for different matrices" do
+    @matrix.send(@method, Matrix[ [42, 2, 3, 4, 5], [2, 3, 4, 5, 6] ]).should be_false
+    @matrix.send(@method, Matrix[ [1, 2, 3, 4, 5, 6], [2, 3, 4, 5, 6, 7] ]).should be_false
+    @matrix.send(@method, Matrix[ [1, 2, 3], [2, 3, 4] ]).should be_false
+  end
+
+  it "returns false for different empty matrices" do
+    Matrix.empty(42, 0).send(@method, Matrix.empty(6, 0)).should be_false
+    Matrix.empty(0, 42).send(@method, Matrix.empty(0, 6)).should be_false
+    Matrix.empty(0, 0).send(@method, Matrix.empty(6, 0)).should be_false
+    Matrix.empty(0, 0).send(@method, Matrix.empty(0, 6)).should be_false
+  end
+
+  it "doesn't distinguish on subclasses" do
+    MatrixSub.ins.send(@method, Matrix.I(2)).should be_true
+  end
+end