ruby_version_is "1.9" do
  describe "Complex#rationalize" do
    it "raises RangeError if self has non-zero imaginary part" do
      lambda { Complex(1,5).rationalize }.should raise_error(RangeError)
    end

    it "raises RangeError if self has 0.0 imaginary part" do
      lambda { Complex(1,0.0).rationalize }.should raise_error(RangeError)
    end

    it "returns a Rational if self has zero imaginary part" do
      Complex(1,0).rationalize.should == Rational(1,1)
      Complex(2<<63+5).rationalize.should == Rational(2<<63+5,1)
    end

    ruby_bug "redmine #5178", "1.9.3.0" do
      it "sends #rationalize to the real part" do
        real = mock_numeric('real')
        real.should_receive(:rationalize).with(0.1).and_return(:result)
        Complex(real, 0).rationalize(0.1).should == :result
      end
    end

    it "ignores a single argument" do
      Complex(1,0).rationalize(0.1).should == Rational(1,1)
    end

    it "raises ArgumentError when passed more than one argument" do
      lambda { Complex(1,0).rationalize(0.1, 0.1) }.should raise_error(ArgumentError)
      lambda { Complex(1,0).rationalize(0.1, 0.1, 2) }.should raise_error(ArgumentError)
    end
  end
end