Goal of Unit Testing

• It is to enable sustainable growth of the software project

• The only way to achieve the goal of unit testing

Benefits

• Tests act as a safety net

• Without testing struggles to scale

• The end result for projects with bad tests or no tests is the same

xxx:

• Value vs. Cost: Not all tests are equally valuable

• Measuring Test Suite Quality (Coverage Metrics):

Attributes of a Successful Test Suite

Definition of a unit test:

• A unit test verifies a single unit of behavior

• Does it quickly,

• And does it in isolation from other tests

Two school: London vs Classical

• Classical: Test for behaviour 👍

• London: Test for Code 👎