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require File.expand_path('../../../spec_helper', __FILE__)
require 'rational'
describe :rational_divide_rat, :shared => true do
it "returns self divided by other as a Rational" do
Rational(3, 4).send(@method, Rational(3, 4)).should eql(Rational(1, 1))
Rational(2, 4).send(@method, Rational(1, 4)).should eql(Rational(2, 1))
Rational(2, 4).send(@method, 2).should == Rational(1, 4)
Rational(6, 7).send(@method, -2).should == Rational(-3, 7)
end
it "raises a ZeroDivisionError when passed a Rational with a numerator of 0" do
lambda { Rational(3, 4).send(@method, Rational(0, 1)) }.should raise_error(ZeroDivisionError)
end
end
describe :rational_divide_int, :shared => true do
it "returns self divided by other as a Rational" do
Rational(3, 4).send(@method, 2).should eql(Rational(3, 8))
Rational(2, 4).send(@method, 2).should eql(Rational(1, 4))
Rational(6, 7).send(@method, -2).should eql(Rational(-3, 7))
end
it "raises a ZeroDivisionError when passed 0" do
lambda { Rational(3, 4).send(@method, 0) }.should raise_error(ZeroDivisionError)
end
end
describe :rational_divide_float, :shared => true do
it "returns self divided by other as a Float" do
Rational(3, 4).send(@method, 0.75).should eql(1.0)
Rational(3, 4).send(@method, 0.25).should eql(3.0)
Rational(3, 4).send(@method, 0.3).should eql(2.5)
Rational(-3, 4).send(@method, 0.3).should eql(-2.5)
Rational(3, -4).send(@method, 0.3).should eql(-2.5)
Rational(3, 4).send(@method, -0.3).should eql(-2.5)
end
it "returns infinity when passed 0" do
Rational(3, 4).send(@method, 0.0).infinite?.should eql(1)
Rational(-3, -4).send(@method, 0.0).infinite?.should eql(1)
Rational(-3, 4).send(@method, 0.0).infinite?.should eql(-1)
Rational(3, -4).send(@method, 0.0).infinite?.should eql(-1)
end
end
describe :rational_divide, :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.send(@method, 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.send(@method, obj).should == :result
end
end
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