Topic: Unit Testing Frameworks

Unit testing frameworks, which help simplify the process of unit testing, have been developed for a wide variety of languages. It is generally possible to perform unit testing without the support of specific framework by writing client code that exercises the units under test and uses assertion, exception, or early exit mechanisms to signal failure. This approach is valuable in that there is a negligible barrier to the adoption of unit testing. However, it is also limited in that many advanced features of a proper framework are missing or must be hand-coded. To address this issue the D programming language offers direct support for unit testing.