test_code.py

from code import roman_to_integer, reverse_words, angle_between_hands

# Test cases for roman_to_integer function
def test_roman_to_integer():
    assert roman_to_integer("I") == 1
    assert roman_to_integer("X") == 10
    assert roman_to_integer("L") == 50
    assert roman_to_integer("C") == 100
    assert roman_to_integer("D") == 500
    assert roman_to_integer("M") == 1000
    assert roman_to_integer("IX") == 9
    assert roman_to_integer("XC") == 90
    assert roman_to_integer("CM") == 900
    assert roman_to_integer("MCMXC") == 1990
    assert roman_to_integer("IXX") == (
        None,
        "Invalid Roman numeral: Invalid subtractive group",
    )
    assert roman_to_integer("MMVIIZ") == (
        None,
        "Invalid Roman numeral: Unknown character 'Z'",
    )

# Test cases for reverse_words function
def test_reverse_words():
    assert reverse_words("Hello World!") == "olleH !dlroW"
    assert reverse_words("OpenAI is awesome.") == "IAnepO si .emosewa"

# Test cases for angle_between_hands function
def test_angle_between_hands():
    # Test case with 3:30
    assert angle_between_hands(3, 30) == 75

    # Test case with 15:30
    assert angle_between_hands(15, 30) == 75

    # Test case with 9:15
    assert angle_between_hands(9, 15) == 172.5

    # Test case with 11:59
    assert angle_between_hands(21, 15) == 172.5

    # Test case with 27:30
    assert angle_between_hands(27, 30) == (
        None,
        "Invalid time: Time values are out of range",
    )