"CacheManager can not be injected" error when using testing framework

[Chris Müller]

Current behavior

Having a functional test case using the testing framework (v7 branch) and testing an extension which uses EXT:schema as dependency the following error is thrown:

1) MyVendor\MyExtension\Tests\Functional\Domain\Repository\MyRepositoryTest::findBySomething
TYPO3\CMS\Core\Cache\CacheManager can not be injected/instantiated during ext_localconf.php/TCA/ext_tables.php loading. Use lazy loading instead.

This is due the definition of the web page types field in TCA for pages where the WebPageTypeProvider is used to get the registered web page types. The provider uses the caching framework to get those entries which is to early at least in the testing framework. In daily work in the backend everything works as expected.

Expected behavior/output

No error is thrown.

Steps to reproduce

Write a functional test case which adds the schema extension via class property $testExtensionsToLoad. Run the test and - boom.

Environment

• schema version: 2.6.1
• TYPO3 version: 11.5.17
• Is your TYPO3 installation set up with Composer (Composer Mode): yes

Possible Solution

Avoid using the schema core cache. As the TCA is stored in cache at warmup (or first hit) the schema core cache may not be needed.