#1, test the 'undefined when there is no game has been completed

    >(simple-simon 3)
    '(green blue red)
    >(score)
    'undefined
    **************************************************************************************************
    #2, call the score in the middle of the game

    >(simple-simon 3)
    '(green blue red)
    >(press 'green)
    'ok
    >(score)
    'undefined
    *************************************************************************************************
    #3 test the score with the result of the game is 'lose

    >(simple-simon 3)
    '(green red blue)
    >(press red)
    'lose
    >(score)
    -3
    ******************************************************************************************************
    #4 test the score with the result of the game is 'win

    >(simple-simon 3)
    '(green blue red)
    >(press green)
    'ok
    >(press blue)
    'ok
    >(press red)
    'win
    >(score)
    3

    ***************************************************************************************************
    #5 test the score in the middle of a new game.

    >(simple-simon 2)
    '(blue red)
    >(press 'green)
    'lose
    >(simple-simon 3)
    '(red red red)
    >(press 'red)
    'ok
    >(score)
    -2

    ***********************************************************************************************
    #6 test the scores for different completed games

    >(simple-simon 2)
    '(red red)
    >(press 'green)
    'lose
    >(score)
    -2
    >(simple-simon 2)
    '(red blue)
    >(press 'red)
    'ok
    >(press 'blue)
    'win
    >(score)
    2
    ********************************************************************************************************
    #7 test the score which is in a uncompleted game,but there is a game has been played.

    >(simple-simon 2)
    '(red blue)
    >(press 'red)
    'ok
    >(press 'blue)
    'win
    >(simple-simon 2)
    '(red yellow)
    >(score)
    2

    *********************************************************************************************************
    #8 test the scores which are in different cinditions

    >(score)
    'undefined

    >(simple-simon 5)
    '(red blue green yellow red)
    >(press 'blue)
    'lose
    >(score)
    -5
    *********************************************************************************************************
    #9 test the scores in a single game
    >(simple-simon 3)
    '(red green blue)
    >(press 'red)
    'ok
    >(score)
    'undefined
    >(press 'green)
    'ok
    >(score)
    'undefined
    >(press 'blue)
    'win
    >(score)
    3
    ***************************************************************************************************************
    #10 test the different scores in different games

    >(score)
    'undefined
    >(simple-simon 3)
    '(red green yellow)
    >(press 'green)
    'lose
    >(score)
    -3
    >(score)
    -3
    >(simple-simon 2)
    '(red red)
    >(score)
    -3
    >(press 'red)
    'ok
    >(score)
    -3
    >(press 'red)
    'win
    >(score)
    1

    Marks
    Summary
    Submission Rule

    +
    Pencil_delete
    # of Test Cases
    4.0: Excellent  Submission has 10 test cases.
    +
    Pencil_delete
    Correctness of Cases
    4.0: Excellent  10 test cases are correct.
    +
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    Formatting
    4.0: Excellent  10 test cases are formatted correctly.
    +
    Pencil_delete
    # of Wins/Losses
    4.0: Excellent  More than one test case is a win and more than one test case is a loss.
    +
    Pencil_delete
    Score Check
    4.0: Excellent  Score is checked in every test case.
    +
    Pencil_delete
    Initial Score Check
    4.0: Excellent  Initial score of 'undefined tested at least once.
    +
    Pencil_delete
    Descriptors
    3.0: Good  Descriptors are present and helpful for more than 5 test cases, but not all.