require_relative '../../spec_helper' describe :rational_multiply_rat, shared: true do it "returns self divided by other as a Rational" do (Rational(3, 4) * Rational(3, 4)).should eql(Rational(9, 16)) (Rational(2, 4) * Rational(1, 4)).should eql(Rational(1, 8)) (Rational(3, 4) * Rational(0, 1)).should eql(Rational(0, 4)) end end describe :rational_multiply_int, shared: true do it "returns self divided by other as a Rational" do (Rational(3, 4) * 2).should eql(Rational(3, 2)) (Rational(2, 4) * 2).should eql(Rational(1, 1)) (Rational(6, 7) * -2).should eql(Rational(-12, 7)) (Rational(3, 4) * 0).should eql(Rational(0, 4)) end end describe :rational_multiply_float, shared: true do it "returns self divided by other as a Float" do (Rational(3, 4) * 0.75).should eql(0.5625) (Rational(3, 4) * 0.25).should eql(0.1875) (Rational(3, 4) * 0.3).should be_close(0.225, TOLERANCE) (Rational(-3, 4) * 0.3).should be_close(-0.225, TOLERANCE) (Rational(3, -4) * 0.3).should be_close(-0.225, TOLERANCE) (Rational(3, 4) * -0.3).should be_close(-0.225, TOLERANCE) (Rational(3, 4) * 0.0).should eql(0.0) (Rational(-3, -4) * 0.0).should eql(0.0) (Rational(-3, 4) * 0.0).should eql(0.0) (Rational(3, -4) * 0.0).should eql(0.0) end end describe :rational_multiply, shared: true do it "calls #coerce on the passed argument with self" do rational = Rational(3, 4) obj = mock("Object") obj.should_receive(:coerce).with(rational).and_return([1, 2]) rational * obj end it "calls #* on the coerced Rational with the coerced Object" do rational = Rational(3, 4) coerced_rational = mock("Coerced Rational") coerced_rational.should_receive(:*).and_return(:result) coerced_obj = mock("Coerced Object") obj = mock("Object") obj.should_receive(:coerce).and_return([coerced_rational, coerced_obj]) (rational * obj).should == :result end end