mirror of
https://github.com/ruby/ruby.git
synced 2022-11-09 12:17:21 -05:00
1d15d5f080
* Other ruby implementations use the spec/ruby directory. [Misc #13792] [ruby-core:82287] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
103 lines
3 KiB
Ruby
103 lines
3 KiB
Ruby
require File.expand_path('../../../spec_helper', __FILE__)
|
|
require File.expand_path('../../../fixtures/rational', __FILE__)
|
|
|
|
describe :kernel_Rational, shared: true do
|
|
describe "passed Integer" do
|
|
# Guard against the Mathn library
|
|
conflicts_with :Prime 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
|
|
end
|