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.  These interfaces currently
include:

Automated 	Output to xml file 		Non-interactive
Basic 		Flexible programming interface 	Non-interactive
Console 	Console interface (ansi C) 	Interactive
Curses 		Graphical interface (Unix) 	Interactive

Homepage:
https://cunit.sourceforge.net/
