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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/difference'
describe "Array#difference" do
it_behaves_like :array_binary_difference, :difference
it "returns a copy when called without any parameter" do
x = [1, 2, 3, 2]
x.difference.should == x
x.difference.should_not equal x
end
it "does not return subclass instances for Array subclasses" do
ArraySpecs::MyArray[1, 2, 3].difference.should be_an_instance_of(Array)
end
it "accepts multiple arguments" do
x = [1, 2, 3, 1]
x.difference([], [0, 1], [3, 4], [3]).should == [2]
end
end
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