Well written. ++!

I have one nit to pick - unit-testing is still black-box testing. One should be testing against the published interface and verifying that the code performs according to spec. Of course, this assumes that one has both well-defined interfaces and a well-defined spec (including error-cases) to work off of.

TDD has a very similar point of view, changing only that the unit-tests combined with the user stories are the spec. The system/integration testing and UAT phases are more verification of the user stories + validation that the user stories are correct. In the terms of the Pragmatic Programmer, TDD is tracer bullets on steroids, with UAT being the iteration.

My criteria for good software:
  1. Does it work?
  2. Can someone else come in, make a change, and be reasonably certain no bugs were introduced?

In reply to Re: Neither system testing nor user acceptance testing is the repeat of unit testing (OT) by dragonchild
in thread Neither system testing nor user acceptance testing is the repeat of unit testing (OT) by pg

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