Testing is a core component of the code development toolbox. Performing automated testing by using unit and integration tests not only helps the developer to detect functionality regressions early, but can also serve as a starting point for developers joining the project. It can help new developers to submit changes to the code project, with assurance that the expected functionality is preserved. For users of the code, automated tests can be essential when verifying that the installation preserves the functionality of the code. A nice byproduct of employing tests for units, modules, or libraries right from the start is that it can guide the programmer towards more modular and less complex code structures, using a pure, functional style, that minimizes and localizes global variables and the global state.
In this chapter, we will demonstrate how to integrate testing...
