Improving QtTest usability with QtTestUtil

As much as I like CppUnit for writing C++ unit tests, I still prefer using Qt’s built-in QtTest module for Qt-based projects. This avoids a dependency on an external library, lowering the threshold for running and writing unit tests. Unfortunately, QtTest is very basic, and lacks some useful features such as automatic test registration and running multiple test suites in one test binary. In order to improve QtTest’s usability, I started creating some macros and classes that fill in some of the gaps, and bundled them into QtTestUtil.