def test_totalCharacters_1(): assert totalCharacters(["this", "is", "a", "list"]) == 11
def test_totalCharacters_4(): assert totalCharacters("1,2,3") == -1
def test_totalCharacters_5(): assert totalCharacters([1, "2", "3"]) == -1
def test_totalCharacters_3(): assert totalCharacters([]) == 0