The documentation page for tests still describes using the old macros instead of the CppUnit Framework [1].

This needs to be updated.

This bug is related to T12666 and should be included in the bugfix release. Please branch from 3fc812cc6633abe2072ca7aa9a4c5e0526c8cb6a

Some documentation was written by Sascha within the test classes [2,3].

[1] http://docs.mitk.org/nightly/GeneralTests.html
[2] http://docs.mitk.org/nightly/classmitk_1_1TestFixture.html
[3] http://docs.mitk.org/nightly/group__MITKTestingAPI.html#gae2944d6fc5fcbc42d03392ed129707e6