fix(tests): Register mount in loginHelper as well

[SystemKeeper]

Fixes

1) OCA\Files_Sharing\Tests\EncryptedSizePropagationTest::testSizePropagationWhenOwnerChangesFile
openssl_public_encrypt(): key parameter is not a valid public key

/home/runner/actions-runner/_work/server/server/apps/encryption/lib/Crypto/Crypt.php:655
/home/runner/actions-runner/_work/server/server/apps/encryption/lib/Crypto/Encryption.php:228
/home/runner/actions-runner/_work/server/server/lib/private/Files/Stream/Encryption.php:396
/home/runner/actions-runner/_work/server/server/lib/private/Files/View.php:634
/home/runner/actions-runner/_work/server/server/lib/private/Files/Node/File.php:52
/home/runner/actions-runner/_work/server/server/lib/private/legacy/OC_Util.php:196
/home/runner/actions-runner/_work/server/server/lib/private/legacy/OC_Util.php:155
/home/runner/actions-runner/_work/server/server/lib/private/User/Session.php:521
/home/runner/actions-runner/_work/server/server/lib/private/User/Session.php:357
/home/runner/actions-runner/_work/server/server/lib/private/User/Session.php:585
/home/runner/actions-runner/_work/server/server/lib/private/User/Session.php:307
/home/runner/actions-runner/_work/server/server/apps/files_sharing/tests/TestCase.php:197
/home/runner/actions-runner/_work/server/server/apps/files_sharing/tests/EncryptedSizePropagationTest.php:36
/home/runner/actions-runner/_work/server/server/apps/files_sharing/tests/TestCase.php:[111](https://github.com/nextcloud/server/actions/runs/15105747424/job/42454147053#step:7:112)
/home/runner/actions-runner/_work/server/server/apps/files_sharing/tests/EncryptedSizePropagationTest.php:21

Minimal repro case:

• Setup NC with Minio (as is done on CI)
• Run phpunit --configuration tests/phpunit-autotest.xml --group DB,SLOWDB --filter 'testSizePropagationWhenOwnerChangesFile' --debug

Still not sure why only running the encrypted test works:

phpunit --configuration tests/phpunit-autotest.xml --group DB,SLOWDB --filter 'EncryptedSizePropagationTest::testSizePropagationWhenOwnerChangesFile' --debug

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[provokateurin]

Nice :)

[come-nc]

👍 Thanks for diving into this