This fixes various (not all) wrong @covers annotations that
are reported as warnings by PHPUnit when it's run with
code-coverage enabled.
When possible, the preferred solution is to change to
@covers at class level, that is the recommended way.
If multiple classes are involved, then a mix of @coversDefaultClass
and @covers at method level are used (always trying to use the
minimum needed patch).
This is the first of a series of issues created as sub-tasks
of MDL-82142.
All setUp(), tearDown(), setUpBeforeClass() and tearDownAfterClass()
must, always, call to parent, to ensure that everything is properly
set and cleaned.
While in a lot of situations this is not needed (parents may not
have anything to run), with PHPUnit >= 10 this can become more
important because we are going to move the reset code from current
placement @ runBare() to setUp()/tearDown().
Note that all the changes performed in this commit have been detected
and fixed by moodle-cs (ParentSetUpTearDownSniffTest).