15 string references to theme.initialization in Drupal 9

ElementInfoIntegrationTest::testElementInfoByTheme in core/tests/Drupal/KernelTests/Core/Render/ElementInfoIntegrationTest.php

Ensures that the element info can be altered by themes.

LibraryDiscoveryIntegrationTest::activateTheme in core/tests/Drupal/KernelTests/Core/Asset/LibraryDiscoveryIntegrationTest.php

Activates a specified theme.

RegistryLegacyTest::testMultipleSubThemes in core/tests/Drupal/KernelTests/Core/Theme/RegistryLegacyTest.php

Tests the theme registry with theme functions and multiple subthemes.

RegistryLegacyTest::testSuggestionPreprocessFunctions in core/tests/Drupal/KernelTests/Core/Theme/RegistryLegacyTest.php

Tests the theme registry with theme functions with suggestions.

RegistryTest::testMultipleSubThemes in core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php

Tests the theme registry with multiple subthemes.

RegistryTest::testSuggestionPreprocessFunctions in core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php

Tests the theme registry with suggestions.

RegistryTest::testThemeRegistryAlterByTheme in core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php

Tests that the theme registry can be altered by themes.

RegistryTest::testThemeTemplatesRegisteredByModules in core/tests/Drupal/KernelTests/Core/Theme/RegistryTest.php

Tests theme-provided templates that are registered by modules.

ResolvedLibraryDefinitionsFilesMatchTest::setUp in core/tests/Drupal/KernelTests/Core/Asset/ResolvedLibraryDefinitionsFilesMatchTest.php

Stable9LibraryOverrideTest::setUp in core/tests/Drupal/KernelTests/Core/Theme/Stable9LibraryOverrideTest.php

Stable9TemplateOverrideTest::testStable9TemplateOverrides in core/tests/Drupal/KernelTests/Core/Theme/Stable9TemplateOverrideTest.php

Ensures that Stable 9 overrides all relevant core templates.

StableLibraryOverrideTest::setUp in core/tests/Drupal/KernelTests/Core/Theme/StableLibraryOverrideTest.php

StableTemplateOverrideTest::testStableTemplateOverrides in core/tests/Drupal/KernelTests/Core/Theme/StableTemplateOverrideTest.php

Ensures that Stable overrides all relevant core templates.

ThemeSettingsForm::buildForm in core/modules/system/src/Form/ThemeSettingsForm.php

_drupal_maintenance_theme in core/includes/theme.maintenance.inc

Sets up the theming system for maintenance page.