from plates import is_valid


def main():
    test_incipit()
    test_length()
    test_digits()
    test_forbidden_characters()


def test_incipit():
    assert is_valid('11AA11') == False
    assert is_valid('11AA') == False
    assert is_valid('1AA2') == False
    assert is_valid('2AAP') == False
    assert is_valid('A1111') == False
    assert is_valid('AA1111') == True


def test_length():
    assert is_valid('') == False
    assert is_valid('A') == False
    assert is_valid('AAAAAA111111') == False


def test_digits():
    assert is_valid('AA111A') == False
    assert is_valid('AA0111') == False


def test_forbidden_characters():
    assert is_valid('AA1.1') == False
    assert is_valid('AA1,1') == False
    assert is_valid('AA1 1') == False
    assert is_valid('AA11!') == False


if __name__ == "__main__":
    main()