1 files changed, 41 insertions, 0 deletions
diff --git a/spec/rubyspec/core/complex/to_i_spec.rb b/spec/rubyspec/core/complex/to_i_spec.rb
new file mode 100644
index 0000000000..ea8b199b2e
--- /dev/null
+++ b/spec/rubyspec/core/complex/to_i_spec.rb
@@ -0,0 +1,41 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "Complex#to_i" do
+  describe "when the imaginary part is Fixnum 0" do
+    it "returns the result of sending #to_i to the real part" do
+      real = mock_numeric('real')
+      real.should_receive(:to_i).and_return(:i)
+      Complex(real, 0).to_i.should == :i
+    end
+  end
+
+  describe "when the imaginary part is Rational 0" do
+    it "returns the result of sending #to_i to the real part" do
+      real = mock_numeric('real')
+      real.should_receive(:to_i).and_return(:i)
+      Complex(real, Rational(0)).to_i.should == :i
+    end
+  end
+
+  describe "when the imaginary part responds to #== 0 with true" do
+    it "returns the result of sending #to_i to the real part" do
+      real = mock_numeric('real')
+      real.should_receive(:to_i).and_return(:i)
+      imag = mock_numeric('imag')
+      imag.should_receive(:==).with(0).any_number_of_times.and_return(true)
+      Complex(real, imag).to_i.should == :i
+    end
+  end
+
+  describe "when the imaginary part is non-zero" do
+    it "raises RangeError" do
+      lambda { Complex(0, 1).to_i }.should raise_error(RangeError)
+    end
+  end
+
+  describe "when the imaginary part is Float 0.0" do
+    it "raises RangeError" do
+      lambda { Complex(0, 0.0).to_i }.should raise_error(RangeError)
+    end
+  end
+end