CUnit is a lightweight system for writing, administering, and running unit
tests in C. It provides C programmers a basic testing functionality with a
flexible variety of user interfaces.

CUnit is built as a static library which is linked with the user's testing
code. It uses a simple framework for building test structures, and provides
a rich set of assertions for testing common data types. In addition, several
different interfaces are provided for running tests and reporting results.
