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Diffstat (limited to 'spec/ruby/core/complex/to_f_spec.rb')
-rw-r--r-- | spec/ruby/core/complex/to_f_spec.rb | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/spec/ruby/core/complex/to_f_spec.rb b/spec/ruby/core/complex/to_f_spec.rb new file mode 100644 index 0000000000..33342e61cc --- /dev/null +++ b/spec/ruby/core/complex/to_f_spec.rb @@ -0,0 +1,41 @@ +require File.expand_path('../../../spec_helper', __FILE__) + +describe "Complex#to_f" do + describe "when the imaginary part is Fixnum 0" do + it "returns the result of sending #to_f to the real part" do + real = mock_numeric('real') + real.should_receive(:to_f).and_return(:f) + Complex(real, 0).to_f.should == :f + end + end + + describe "when the imaginary part is Rational 0" do + it "returns the result of sending #to_f to the real part" do + real = mock_numeric('real') + real.should_receive(:to_f).and_return(:f) + Complex(real, Rational(0)).to_f.should == :f + end + end + + describe "when the imaginary part responds to #== 0 with true" do + it "returns the result of sending #to_f to the real part" do + real = mock_numeric('real') + real.should_receive(:to_f).and_return(:f) + imag = mock_numeric('imag') + imag.should_receive(:==).with(0).any_number_of_times.and_return(true) + Complex(real, imag).to_f.should == :f + end + end + + describe "when the imaginary part is non-zero" do + it "raises RangeError" do + lambda { Complex(0, 1).to_f }.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_f }.should raise_error(RangeError) + end + end +end |