def test_clean():
tel = [4, 9, 7, 1, 9, 2, 7]
output = [4, 9, 7, 1, 9, 2, 7]
words = tel_combination_clean.gen_tel_combination(tel, 0, [], output)
assert len(words) == 729
def test_clean_ones_twos():
tel = [1, 1, 2, 1, 3, 1, 1]
output = [1, 1, 2, 1, 1, 1, 1]
words = tel_combination_clean.gen_tel_combination(tel, 0, [], output)
assert len(words) == 9
def test_clean_full():
tel = [4, 9, 7, 3, 9, 2, 7]
output = [4, 9, 7, 3, 9, 2, 7]
words = tel_combination_clean.gen_tel_combination(tel, 0, [], output)
assert len(words) == pow(3, 7)