# Functions go here

#Check that users have entered a valid option based on a list
def string_checker(user_response, valid_ans):
     while True:

          # Get user response and make sure it's lowercase
          user_response = user_response.lower()

          for item in valid_ans:
               # check if the user response is a word in the list
               if item == user_response:
                   return item

               # check if the user response is the same as the first letter of an item in the list
               elif user_response == item[0]:
                return item

          return "invalid"

# 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:
     # retrieve test case and expected value
     case = item[0]
     expected = item[1]

     # get actual value (ie: test ticket function)
     actual = string_checker(case,["yes", "no"])

     # compare actual and expected and output pass / fail
     if actual == expected:
          print(f" Passed! Case: {case}, expected: {expected}, received: {actual}")
     else:
          print(f" Failed! Case: {case}, expected: {expected}, received: {actual}")