Testing versus Debugging   

• Testing is the act of executing a program with selected data to uncover bugs.
• Debugging, is the process of finding the faulty code responsible for failed tests.

Rules of Debugging   

1. You can’t debug what you don’t understand
2. Make it fail...
   1. Make it fail reliably
   2. Make it fail easily
   3. Make it fail visibly
3. Track down the culprit
   1. Don’t Guess, Hypothesize
   2. Divide and Conquer
   3. If you didn’t fix it, it ain’t fixed!

• Today we’ll focus on the first two
• See also Debugging by David Agans, and www.debuggingrules.com

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