Shen_Jianghao_HW1.txt

Ruby intro part 1
  #sum
    should be defined
    returns correct sum [20 points]
    works on the empty array [10 points]
  #max_2_sum
    should be defined
    returns the correct sum [7 points]
    works even if 2 largest values are the same [3 points]
    returns zero if array is empty [10 points]
    returns value of the element if just one element [10 points]
  #sum_to_n
    should be defined
    returns true when any two elements sum to the second argument [30 points]
    returns false for any single element array [5 points]
    returns false for an empty array [5 points]

#hello
  should be defined
  The hello method returns the correct string [30 points]

#starts_with_consonant?
  should be defined
  classifies true cases [10 points]
  classifies false cases [10 points]
  works on the empty string [5 points]
  works on nonletters [5 points]

#binary_multiple_of_4?
  should be defined
  classifies valid binary numbers [30 points]
  rejects invalid binary numbers [10 points]

BookInStock
  should be defined
  getters and setters
    should set ISBN [10 points]
    should set price [10 points]
    should be able to change ISBN [10 points]
    should be able to change price [10 points]
  constructor
    should reject invalid ISBN number [10 points]
    should reject zero price [10 points]
    should reject negative price [10 points]
  #price_as_string
    should be defined
    should display 33.95 as "$33.95" [10 points]
    should display 1.1 as $1.10 [10 points]
    should display 20 as $20.00 [10 points]

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34 examples, 0 failures