8 string references to file.usage in Zircon Profile 8

DeleteTest::testInUse in core/modules/file/src/Tests/DeleteTest.php

Tries deleting a file that is in use.

EditorFileUsageTest::testEditorEntityHooks in core/modules/editor/src/Tests/EditorFileUsageTest.php

Tests the configurable text editor manager.

FileListingTest::testFileListingPages in core/modules/file/src/Tests/FileListingTest.php

Tests file overview with different user permissions.

ManagedFile::fileUsage in core/modules/file/src/Element/ManagedFile.php

Wraps the file usage service.

ServiceProviderTest::testServiceProviderRegistration in core/modules/system/src/Tests/ServiceProvider/ServiceProviderTest.php

Tests that services provided by module service providers get registered to the DIC.

ServiceProviderTestServiceProvider::alter in core/modules/system/tests/modules/service_provider_test/src/ServiceProviderTestServiceProvider.php

Modifies existing service definitions.

UsageTest::testAddUsage in core/modules/file/src/Tests/UsageTest.php

Tests \Drupal\file\FileUsage\DatabaseFileUsageBackend::add().

UsageTest::testRemoveUsage in core/modules/file/src/Tests/UsageTest.php

Tests \Drupal\file\FileUsage\DatabaseFileUsageBackend::delete().