require_relative '../../spec_helper' require_relative '../../fixtures/rational' describe :rational_cmp_rat, shared: true do it "returns 1 when self is greater than the passed argument" do (Rational(4, 4) <=> Rational(3, 4)).should equal(1) (Rational(-3, 4) <=> Rational(-4, 4)).should equal(1) end it "returns 0 when self is equal to the passed argument" do (Rational(4, 4) <=> Rational(4, 4)).should equal(0) (Rational(-3, 4) <=> Rational(-3, 4)).should equal(0) end it "returns -1 when self is less than the passed argument" do (Rational(3, 4) <=> Rational(4, 4)).should equal(-1) (Rational(-4, 4) <=> Rational(-3, 4)).should equal(-1) end end describe :rational_cmp_int, shared: true do it "returns 1 when self is greater than the passed argument" do (Rational(4, 4) <=> 0).should equal(1) (Rational(4, 4) <=> -10).should equal(1) (Rational(-3, 4) <=> -1).should equal(1) end it "returns 0 when self is equal to the passed argument" do (Rational(4, 4) <=> 1).should equal(0) (Rational(-8, 4) <=> -2).should equal(0) end it "returns -1 when self is less than the passed argument" do (Rational(3, 4) <=> 1).should equal(-1) (Rational(-4, 4) <=> 0).should equal(-1) end end describe :rational_cmp_float, shared: true do it "returns 1 when self is greater than the passed argument" do (Rational(4, 4) <=> 0.5).should equal(1) (Rational(4, 4) <=> -1.5).should equal(1) (Rational(-3, 4) <=> -0.8).should equal(1) end it "returns 0 when self is equal to the passed argument" do (Rational(4, 4) <=> 1.0).should equal(0) (Rational(-6, 4) <=> -1.5).should equal(0) end it "returns -1 when self is less than the passed argument" do (Rational(3, 4) <=> 1.2).should equal(-1) (Rational(-4, 4) <=> 0.5).should equal(-1) end end describe :rational_cmp_coerce, 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 describe :rational_cmp_coerce_exception, shared: true do ruby_version_is ""..."2.5" do it "rescues exception (StandardError and subclasses) raised in other#coerce and returns nil" do b = mock("numeric with failed #coerce") b.should_receive(:coerce).and_raise(RationalSpecs::CoerceError) -> { (Rational(3, 4) <=> b).should == nil }.should complain(/Numerical comparison operators will no more rescue exceptions of #coerce/) end it "does not rescue Exception and StandardError siblings raised in other#coerce" do [Exception, NoMemoryError].each do |exception| b = mock("numeric with failed #coerce") b.should_receive(:coerce).and_raise(exception) -> { Rational(3, 4) <=> b }.should raise_error(exception) end end end ruby_version_is "2.5" do it "does not rescue exception raised in other#coerce" do b = mock("numeric with failed #coerce") b.should_receive(:coerce).and_raise(RationalSpecs::CoerceError) -> { Rational(3, 4) <=> b }.should raise_error(RationalSpecs::CoerceError) end end end describe :rational_cmp_other, shared: true do it "returns nil" do (Rational <=> mock("Object")).should be_nil end end