* - gmx::test::TestFileInputRedirector (in testfileredirector.h) provides
* functionality for capturing file existence checks in code that uses
* gmx::FileInputRedirectorInterface.
+ * - gmx::test::TestFileOutputRedirector (in testfileredirector.h) provides
+ * functionality for capturing file output (including `stdout`) from code
+ * that uses gmx::FileOutputRedirectorInterface, and checking that output
+ * against reference data.
* - #GMX_TEST_OPTIONS macro provides facilities for adding custom command
* line options for the test binary.
* - testasserts.h provides several custom test assertions for better