Test if destruct() in ImageStyleWarmer class is working correct

Changes of MR solve the issue that only 1 file was added to Image Style Warmer queue.

I don't know if this is really a good idea, because if a lot of files should be warmup (for example: from bulk upload, bulk warmup action or warmup via drush) we maybe run into PHP memory limit issues.

Maybe it also would be better to run only initial warmup from destruct() and add each file to queue outside of destruct() method.

I think adding to queue and also collecting files for initial warmup could be improved to reduce duplicate file processing here, but I will add this improvement at some later point in follow up release 8.x-1.3 to get first a stable D10 release with 8.x-1.2.

I hope this will be fine for all.

Automatically closed - issue fixed for 2 weeks with no activity.