Acceptance, Regression, Unit, Functional...

Same thing, just a matter of timing.

Unit: Detailed tests of individual parts

• Unit tests are easy(er)

• So we think of the rest in terms of unit tests

Functional: Tests of your API

• Blackbox unit tests

Integration: Testing that the pieces work together

• Just unit testing bigger units

Acceptance: Tests defining your requirements

• Customer-driven feature tests

Regression: Tests for backwards compatibility

• Old tests never die, they just become regression tests

All can be done with the same techniques

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