Done requested changes - returned fallback to FakeCacheHandler zero time parameterusage and comments.

Testing internal caches expiration for Memcache
ITEM site_serial:1766886194:1:master:last_cache_rebuild [68 b; 0 s]
Failed condition "these keys have infinite expiration (the 1738250904 number might differ on your install)" - given "0 s" is not like some great integer like "1738250904"

Detected that after memcache restart, test setCache with $application->setCache('key_with_def_exp', 'v1');, is passed only when twice open index.php. First index.php opening does not set value.

Renoved fallback logic, updated test plan.

Tried test part 4. No messages in system log given. Maybe, because of START TRANSACTION SQL command. Transaction not committed, so no records created in DB.

On processing line with "Step 4." comment, i have lock much more then 50 seconds. Practically, it never ends. In case, when lock continue, in other debug window go to step 5 - lock ends, but no system log record about this lock created.

@alex trouble in part3 1 G - cant't get "detailed lock retry info is shown in the system log".

Found difference from test plan expectation:
test Hour field validation: has error on 30-35 value

There is not simple filter by g.Name, but complex filter "((1) AND ( (g.Name) LIKE '%mem%'))", where part "(1) AND" is excessive. Maybe, this "(1) AND" should be removed from SQL request.

Tested with clean install only.

Math is incorrect.

Added code to avoid "Array to string conversion" notice. Added related test plan part.

1. In the test plan part 4 need "Picker" value, not "Checkboxes"
2. However, if "Checkboxes" selected, looks incorrect - shown only one checkbox, not multiple checkboxes with one-two-three labels.
3. Items alphabetical sorting is not applied on page load, so after save/on page reload options order may change.

Работает всё как надо, но наверное надо исправить Test Plan. В "Plan 2" и "Plan 3" в SQL не хватает фильтра WHERE ((52x_Users.UserType = 0))

Added missing table creation on in-portal upgrade

Changed install schema due Jenkins message - all primary key fields must be without null values

Made all requested improvements

Made all requested fixes

Done requested changes in all other modules

No output detected after doing test plan.

Partially tested.
6 records appears in the System Log on one News record export.

1. Field "ThumbnailImage" is not defined in "n" unit config
2. Undefined index: ThumbnailImage
3. Field "FullImage" is not defined in "n" unit config
4. Undefined index: FullImage
5. Field "ImageAlt" is not defined in "n" unit config
6. Undefined index: ImageAlt

Tested. Parent Section dropdown is not empty, "Home" value is visible in the Parent Section dropdown.

Made QA changes, extended test plan.

QA Fixes

Added system user check to session LoggedIn method.

Test plan is all right. But, beyond this patch, exists SQL error when doing "View Chart" for "By Product" and "By Section" cases. Problematic SQL is like

Cant test this - do not have macOS

Can't test - have PHP 7.2.19 only

I have no php 7.4 on VM to test/review this.