Test Coverage

• Black-box testing: test functionality without consideration of internal structure of implementation

• White-box testing: take internal structure into account when designing tests

• Test coverage: measure of how many parts of a program have been tested

• Make sure that each part of your program is exercised at least once by one test case
  E.g., make sure to execute each branch in at least one test case

• Include boundary test cases: legal values that lie at the boundary of the set of acceptable inputs

• Tip: write first test cases before program is written completely → gives insight into what program should do