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require File.dirname(__FILE__) + '/../../spec_helper'
require 'rational'
describe "Rational.reduce when Unify is defined" do
# This is not consistent with the Complex library, Complex checks
# Complex::Unify and not the top-level Unify.
it "returns an Integer when the reduced denominator is 1" do
begin
Unify = true
Rational.reduce(3, 1).should eql(3)
Rational.reduce(5, 1).should eql(5)
Rational.reduce(4, 2).should eql(2)
Rational.reduce(-9, 3).should eql(-3)
ensure
Object.send :remove_const, :Unify
end
end
end
describe "Rational.reduce" do
it "returns a new Rational with the passed numerator and denominator reduced to their lowest terms" do
Rational(6, 8).should eql(Rational(3, 4))
Rational(-5, 10).should eql(Rational(-1, 2))
end
it "raises a ZeroDivisionError when the passed denominator is 0" do
lambda { Rational.reduce(4, 0) }.should raise_error(ZeroDivisionError)
lambda { Rational.reduce(-1, 0) }.should raise_error(ZeroDivisionError)
end
end
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