- BlockTestCase::testCustomBlock in core/modules/ block/ tests/ block.test 
- Test creating custom block, editing, and then deleting it.
- BlockTestCase::testCustomBlockFormat in core/modules/ block/ tests/ block.test 
- Test creating custom block using Raw HTML (full_html).
- BlockTranslationTestCase::testTranslateCustomBlock in core/modules/ block/ tests/ block.translation.test 
- Test creating custom block, translate it, and then deleting it.
- DashboardWelcomeBlock::getContent in core/modules/ dashboard/ includes/ block.welcome.inc 
- Return the content of a block.
- Layout::save in core/modules/ layout/ includes/ layout.class.inc 
- Save a layout to config.
- LayoutCloneTest::testLayoutClone in core/modules/ layout/ tests/ layout.test 
- LayoutInterfaceTest::testBlockBasics in core/modules/ layout/ tests/ layout.test 
- Add and remove blocks from a custom layout path.
- LayoutInterfaceTest::testBlockEntityIDConditions in core/modules/ layout/ tests/ layout.test 
- Test block entity ID conditions.
- LayoutInterfaceTest::testBlockPathTypeConditions in core/modules/ layout/ tests/ layout.test 
- Test block path and type conditions.
- LayoutInterfaceTest::testBlockUserCompareConditions in core/modules/ layout/ tests/ layout.test 
- Tests user account comparison condition.
- LayoutInterfaceTest::testLayoutChange in core/modules/ layout/ tests/ layout.test 
- Tests switching between different layouts, ensuring block copying.
- LayoutInterfaceTest::testLayoutMenuItems in core/modules/ layout/ tests/ layout.test 
- Tests conditions and menu item navigation.
- LayoutInterfaceTest::testMainContentBlock in core/modules/ layout/ tests/ layout.test 
- Check special conditions around the main content block.
- LayoutInterfaceTest::testMenuItemReassignment in core/modules/ layout/ tests/ layout.test 
- Ensure that reassignment of menu items works when deleting layouts.
- layout_entity_admin_add_form in core/modules/ layout/ layout.entity.admin.inc 
- Render the form for adding a layout for an entity.
- layout_entity_admin_add_form_submit in core/modules/ layout/ layout.entity.admin.inc 
- Submit handler for layout_entity_admin_add_form().
- layout_get_layout_by_path in core/modules/ layout/ layout.module 
- Get the layout which is active based on a path or router item.
- layout_get_layout_tempstore in core/modules/ layout/ layout.module 
- Get a layout or menu item currently being edited from the tempstore.
- layout_route_handler in core/modules/ layout/ layout.module 
- Route handler callback; Execute the current route item or wrap in a layout.
- layout_settings_form_save_submit in core/modules/ layout/ layout.admin.inc 
- Submit handler for layout_settings_form() that saves in-progress changes.
- LocaleLanguageSwitchingFunctionalTest::testLanguageBlock in core/modules/ locale/ tests/ locale.test 
- Functional tests for the language switcher block.
- LocaleUILanguageNegotiationTest::testUrlLanguageFallback in core/modules/ locale/ tests/ locale.test 
- Test URL language detection when the requested URL has no language.
- MenuBreadcrumbTestCase::setUp in core/modules/ simpletest/ tests/ menu.test 
- Sets up a Backdrop site for running functional and integration tests.
- MenuBreadcrumbTestCase::testBreadCrumbs in core/modules/ simpletest/ tests/ menu.test 
- Tests breadcrumbs on node and administrative paths.
- MenuTestCase::addCustomMenu in core/modules/ menu/ tests/ menu.test 
- Add custom menu.
- MenuTestCase::setUp in core/modules/ menu/ tests/ menu.test 
- Sets up a Backdrop site for running functional and integration tests.
- MenuTestCase::testMenu in core/modules/ menu/ tests/ menu.test 
- Login users, add menus and menu links, and test menu functionality through the admin and user interfaces.
- MenuTrailTestCase::setUp in core/modules/ simpletest/ tests/ menu.test 
- Sets up a Backdrop site for running functional and integration tests.
- NodeBlockFunctionalTest::testRecentNodeBlock in core/modules/ node/ tests/ node.test 
- Tests the recent content block.
- NodeBlockTestCase::testSyndicateBlock in core/modules/ node/ tests/ node.test 
- Tests the "Syndicate" block settings.
- SearchBlockTestCase::testBlock in core/modules/ search/ tests/ search.test 
- Test that the search block form works correctly.
- SearchCommentCountToggleTestCase::setUp in core/modules/ search/ tests/ search.test 
- Sets up a Backdrop site for running functional and integration tests.
- SearchCommentTestCase::setUp in core/modules/ search/ tests/ search.test 
- Sets up a Backdrop site for running functional and integration tests.
- SearchConfigSettingsForm::setUp in core/modules/ search/ tests/ search.test 
- Sets up a Backdrop site for running functional and integration tests.
- SimpleTestFunctionalTest::testInternalBrowser in core/modules/ simpletest/ tests/ simpletest.test 
- Test the internal browsers functionality.
- standard_form_install_configure_submit in core/profiles/ standard/ standard.profile 
- Extra submit handler install_configure_form().
- SystemBlockTestCase::testSystemBlocks in core/modules/ system/ tests/ system.test 
- Test displaying and hiding the powered-by and help blocks.
- TranslationTestCase::setUp in core/modules/ translation/ tests/ translation.test 
- Sets up a Backdrop site for running functional and integration tests.
- UserBlocksUnitTests::testUserLoginBlock in core/modules/ user/ tests/ user.test 
- Tests the secondary menu.
- ViewsPluginDisplayBlockTestCase::testViewBlocks in core/modules/ views/ tests/ plugins/ views_plugin_display_block.test 
- Tests, whether and how the reset button can be renamed.
- ViewsUIWizardBasicTestCase::testViewsWizardAndListing in core/modules/ views/ tests/ views_ui.test 
- ViewsUIWizardDisplaysTestCase::testOverrideDisplays in core/modules/ views/ tests/ views_ui.test 
- Tests that displays can be overridden via the UI.
- ViewsUIWizardDisplaysTestCase::testWizardMixedDefaultOverriddenDisplays in core/modules/ views/ tests/ views_ui.test 
- Tests that the wizard correctly sets up default and overridden displays.
- ViewsUIWizardItemsPerPageTestCase::testItemsPerPage in core/modules/ views/ tests/ views_ui.test 
- Tests the number of items per page.
