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require File.expand_path('../../../spec_helper', __FILE__)
require 'rational'
describe :rational_plus_rat, :shared => true do
it "returns the result of substracting other from self as a Rational" do
(Rational(3, 4) + Rational(0, 1)).should eql(Rational(3, 4))
(Rational(3, 4) + Rational(1, 4)).should eql(Rational(1, 1))
(Rational(3, 4) + Rational(2, 1)).should eql(Rational(11, 4))
end
end
describe :rational_plus_int, :shared => true do
it "returns the result of substracting other from self as a Rational" do
(Rational(3, 4) + 1).should eql(Rational(7, 4))
(Rational(3, 4) + 2).should eql(Rational(11, 4))
end
end
describe :rational_plus_float, :shared => true do
it "returns the result of substracting other from self as a Float" do
(Rational(3, 4) + 0.2).should eql(0.95)
(Rational(3, 4) + 2.5).should eql(3.25)
end
end
describe :rational_plus, :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
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