Even though the main objective of test-driven development is the approach to code design, tests are still a very important aspect of TDD and we should have a clear understanding of two major groups of techniques as follows:

  • Black-box testing
  • White-box testing

The black-box testing

Black-box testing (also known as functional testing) treats software under test as a black-box without knowing its internals. Tests use software interfaces and try to ensure that they work as expected. As long as functionality of interfaces remains unchanged, tests should pass even if internals are changed. Tester is aware of what the program should do, but does not have the knowledge of how it does it. Black-box testing is most commonly used type of testing in traditional ...

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