[TYPO3-core] RFC #12422: Bug: Fix failing unit test in t3lib_cache_backend_FileBackendTestCase

[Christian Kuhn]

Hey,

Niels Pardon wrote:
> Problem:
> The unit test "getCacheDirectoryReturnsThePreviouslySetDirectory" in
> t3lib_cache_backend_FileBackendTestCase currently fails due to changed
> behavior in the tested class.
> 
> Solution:
> Fix the unit test to reflect the change in the tested class.

FYI: This one is solved with #3819.

Regards
Christian