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require File.expand_path('../../../spec_helper', __FILE__)
require '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_other, :shared => true do
it "returns nil" do
(Rational <=> mock("Object")).should be_nil
end
end
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