A detailed summary of unit tests may include, perhaps, a measure of code coverage or a diagram showing where you reached code coverage. But even this is not particularly valuable. This is part of the unit test problem - it's easy to add unit test to add extra code coverage without adding confidence in your code.
If you have some specific tests that, for example, check which known I / O combinations worked or check the processing of certain cases of edges or exceptions, then you can document them. If you used test development, where the test proceeds from the problem and its analysis, and not from the code in a "modified" manner, then also say so.
In any case, we’ll put some simple metrics there, but you should always take them with lots of salt ...