from nose.tools import assert_equal

class TestGroupOrdered(object):

    def test_group_ordered(self,func):

        assert_equal(func(None), None)
        assert_equal(func([]), [])
        assert_equal(func([1]), [1])
        assert_equal(func([1,2,1,3,2]),[1,1,2,2,3])
        assert_equal(func(['a','b','a']),['a','a','b'])
        assert_equal(func([1,1,2,3,4,5,2,1]),[1,1,1,2,2,3,4,5])
        assert_equal(func([1,2,3,4,3,4]),[1,2,3,3,4,4])

def main():
    test = TestGroupOrdered()
    test.test_group_ordered(group_ordered)
    try:
        test.test_group_ordered(group_ordered_alt)
    except NameError:
        # Alternate solutions are only defined
        # in the solutions file
        pass

if __name__ == '__main__':
    main()