# checks users entered a valid option option based on a list
def string_checker(users_response)
    return "yes"


# Automated testing is below in the form (test_case, expected value)
to_test = [
    ("Yes", "yes"),
    ("Y", "yes"),
    ("No", "no"),
    ("N", "no"),
    ("YeS", "yes"),
    ("maybe", "invalid"),
]

# run tests!
for item in to_test:
    #retrive test case and expected value
    case = item[0]
    expected = item [1]

    # get actual value (ie: test ticket function)
    actual = string_checker(case, )