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require File.expand_path('../../../../spec_helper', __FILE__)
require 'mathn'
ruby_version_is ''...'1.9' do
describe "Integer#gcd2" do
it "Returns the greatest common divisor of the two numbers" do
15.gcd2(5).should == 5
15.gcd2(-6).should == 3
-23.gcd2(19).should == 1
-10.gcd2(-2).should == 2
end
it "raises a ZeroDivisionError when is called on zero" do
lambda { 0.gcd2(2) }.should raise_error(ZeroDivisionError)
lambda { 2.gcd2(0) }.should raise_error(ZeroDivisionError)
end
end
end
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