How do we know if your HW15 tests are adequate.

First:
    make coverage
    # View your json.c.gcov if coverage is not 100%.

Second:
    Go back to basics.
    - Easy cases
      ex:  [1, 2]
    - "Edge" cases
      ex:  []         # shortest
      ex:  [1, 2, 3]  # long enough
    - Corner cases
      ex:  [1]
    - Special cases
      ???

Start with good:
[1,2,3]

How can we change that around to catch bugs?

Extra comma?
    [1,, 2, 3]    // invalid

Missing comma?
    [1 2, 3]      // invalid

Spacing?
    [1,  2,  3]   // valid
    [  1,2  ,3]   // valid
    // Where else could we put spaces?

Add brackets?

Remove brackets?

Different types inside list?

Invalid elements inside lists?

Does it clean up if list turns out to be invalid?
ex:  [1, "abc", [2, 3, 4],
     // That is invalid, but we won't find out until after we allocated memory for
     // "abc" and [2, 3, 4]