require_relative '../../spec_helper' require_relative '../../fixtures/rational' describe :kernel_Rational, shared: true do describe "passed Integer" do # Guard against the Mathn library guard -> { !defined?(Math.rsqrt) } do it "returns a new Rational number with 1 as the denominator" do Rational(1).should eql(Rational(1, 1)) Rational(-3).should eql(Rational(-3, 1)) Rational(bignum_value).should eql(Rational(bignum_value, 1)) end end end describe "passed two integers" do it "returns a new Rational number" do rat = Rational(1, 2) rat.numerator.should == 1 rat.denominator.should == 2 rat.should be_an_instance_of(Rational) rat = Rational(-3, -5) rat.numerator.should == 3 rat.denominator.should == 5 rat.should be_an_instance_of(Rational) rat = Rational(bignum_value, 3) rat.numerator.should == bignum_value rat.denominator.should == 3 rat.should be_an_instance_of(Rational) end it "reduces the Rational" do rat = Rational(2, 4) rat.numerator.should == 1 rat.denominator.should == 2 rat = Rational(3, 9) rat.numerator.should == 1 rat.denominator.should == 3 end end describe "when passed a String" do it "converts the String to a Rational using the same method as String#to_r" do r = Rational(13, 25) s_r = ".52".to_r r_s = Rational(".52") r_s.should == r r_s.should == s_r end it "scales the Rational value of the first argument by the Rational value of the second" do Rational(".52", ".6").should == Rational(13, 15) Rational(".52", "1.6").should == Rational(13, 40) end it "does not use the same method as Float#to_r" do r = Rational(3, 5) f_r = 0.6.to_r r_s = Rational("0.6") r_s.should == r r_s.should_not == f_r end describe "when passed a Numeric" do it "calls #to_r to convert the first argument to a Rational" do num = RationalSpecs::SubNumeric.new(2) Rational(num).should == Rational(2) end end describe "when passed a Complex" do it "returns a Rational from the real part if the imaginary part is 0" do Rational(Complex(1, 0)).should == Rational(1) end it "raises a RangeError if the imaginary part is not 0" do lambda { Rational(Complex(1, 2)) }.should raise_error(RangeError) end end it "raises a TypeError if the first argument is nil" do lambda { Rational(nil) }.should raise_error(TypeError) end it "raises a TypeError if the second argument is nil" do lambda { Rational(1, nil) }.should raise_error(TypeError) end it "raises a TypeError if the first argument is a Symbol" do lambda { Rational(:sym) }.should raise_error(TypeError) end it "raises a TypeError if the second argument is a Symbol" do lambda { Rational(1, :sym) }.should raise_error(TypeError) end end ruby_version_is "2.6" do describe "when passed exception: false" do describe "and [non-Numeric]" do it "swallows an error" do Rational(:sym, exception: false).should == nil Rational("abc", exception: false).should == nil end end describe "and [non-Numeric, Numeric]" do it "swallows an error" do Rational(:sym, 1, exception: false).should == nil Rational("abc", 1, exception: false).should == nil end end describe "and [anything, non-Numeric]" do it "swallows an error" do Rational(:sym, :sym, exception: false).should == nil Rational("abc", :sym, exception: false).should == nil end end describe "and non-Numeric String arguments" do it "swallows an error" do Rational("a", "b", exception: false).should == nil Rational("a", 0, exception: false).should == nil Rational(0, "b", exception: false).should == nil end end ruby_bug "#15525", "2.6"..."2.6.1" do describe "and nil arguments" do it "swallows an error" do Rational(nil, exception: false).should == nil Rational(nil, nil, exception: false).should == nil end end end end end end