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