Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 93 insertions, 0 deletions

diff --git a/spec/rubyspec/shared/complex/equal_value.rb b/spec/rubyspec/shared/complex/equal_value.rb
new file mode 100644
index 0000000000..d944698878
--- /dev/null
+++ b/spec/rubyspec/shared/complex/equal_value.rb
@@ -0,0 +1,93 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe :complex_equal_value, shared: true do
+  describe "with Complex" do
+    it "returns true when self and other have numerical equality" do
+      Complex(1, 2).should == Complex(1, 2)
+      Complex(3, 9).should == Complex(3, 9)
+      Complex(-3, -9).should == Complex(-3, -9)
+
+      Complex(1, 2).should_not == Complex(3, 4)
+      Complex(3, 9).should_not == Complex(9, 3)
+
+      Complex(1.0, 2.0).should == Complex(1, 2)
+      Complex(3.0, 9.0).should_not == Complex(9.0, 3.0)
+
+      Complex(1.5, 2.5).should == Complex(1.5, 2.5)
+      Complex(1.5, 2.5).should == Complex(1.5, 2.5)
+      Complex(-1.5, 2.5).should == Complex(-1.5, 2.5)
+
+      Complex(1.5, 2.5).should_not == Complex(2.5, 1.5)
+      Complex(3.75, 2.5).should_not == Complex(1.5, 2.5)
+
+      Complex(bignum_value, 2.5).should == Complex(bignum_value, 2.5)
+      Complex(3.75, bignum_value).should_not == Complex(1.5, bignum_value)
+
+      Complex(nan_value).should_not == Complex(nan_value)
+    end
+  end
+
+  describe "with Numeric" do
+    it "returns true when self's imaginary part is 0 and the real part and other have numerical equality" do
+      Complex(3, 0).should == 3
+      Complex(-3, 0).should == -3
+
+      Complex(3.5, 0).should == 3.5
+      Complex(-3.5, 0).should == -3.5
+
+      Complex(bignum_value, 0).should == bignum_value
+      Complex(-bignum_value, 0).should == -bignum_value
+
+      Complex(3.0, 0).should == 3
+      Complex(-3.0, 0).should == -3
+
+      Complex(3, 0).should_not == 4
+      Complex(-3, 0).should_not == -4
+
+      Complex(3.5, 0).should_not == -4.5
+      Complex(-3.5, 0).should_not == 2.5
+
+      Complex(bignum_value, 0).should_not == bignum_value(10)
+      Complex(-bignum_value, 0).should_not == -bignum_value(20)
+    end
+  end
+
+  describe "with Object" do
+    # Fixnum#==, Float#== and Bignum#== only return booleans - Bug?
+    it "calls other#== with self" do
+      value = Complex(3, 0)
+
+      obj = mock("Object")
+      obj.should_receive(:==).with(value).and_return(:expected)
+
+      (value == obj).should_not be_false
+    end
+  end
+
+  describe "with a Numeric which responds to #real? with true" do
+    before do
+      @other = mock_numeric('other')
+      @other.should_receive(:real?).any_number_of_times.and_return(true)
+    end
+
+    it "returns real == other when the imaginary part is zero" do
+      real = mock_numeric('real')
+      real.should_receive(:==).with(@other).and_return(true)
+      (Complex(real, 0) == @other).should be_true
+    end
+
+    it "returns false when when the imaginary part is not zero" do
+      (Complex(3, 1) == @other).should be_false
+    end
+  end
+
+  describe "with a Numeric which responds to #real? with false" do
+    it "returns other == self" do
+      complex = Complex(3, 0)
+      other = mock_numeric('other')
+      other.should_receive(:real?).any_number_of_times.and_return(false)
+      other.should_receive(:==).with(complex).and_return(true)
+      (complex == other).should be_true
+    end
+  end
+end