| StreamWrapperTest | class |  | modules/simpletest/tests/file.test | Tests stream wrapper functions. | 
          
                  | SummaryLengthTestCase | class |  | modules/node/tests/node.test | Tests the summary length functionality. | 
          
                  | SyslogTestCase | class |  | modules/syslog/tests/syslog.test |  | 
          
                  | SystemAdminTestCase | class |  | modules/system/tests/system.test | Tests administrative overview pages. | 
          
                  | SystemAuthorizeCase | class |  | modules/system/tests/system.test | Tests authorize.php and related hooks. | 
          
                  | SystemBlockTestCase | class |  | modules/system/tests/system.test |  | 
          
                  | SystemConfigFormCase | class |  | modules/simpletest/tests/system_config_test.inc | Test forms that save data using the configuration system. | 
          
                  | SystemIndexPhpTest | class |  | modules/system/tests/system.test | Test the handling of requests containing 'index.php'. | 
          
                  | SystemInfoAlterTestCase | class |  | modules/system/tests/system.test | Tests the effectiveness of hook_system_info_alter(). | 
          
                  | SystemMainContentFallback | class |  | modules/system/tests/system.test | Test main content rendering fallback provided by system module. | 
          
                  | SystemQueue | class |  | modules/system/system.queue.inc | Default queue implementation. | 
          
                  | SystemSettingsFormTest | class |  | modules/simpletest/tests/form.test |  | 
          
                  | SystemTestFileTransfer | class |  | modules/simpletest/tests/system_test.module | Mock FileTransfer object to test the settings form functionality. | 
          
                  | SystemThemeFunctionalTest | class |  | modules/system/tests/system.test | Tests for the theme interface functionality. | 
          
                  | SystemValidTokenTest | class |  | modules/system/tests/system.test | Test case for backdrop_valid_token(). | 
          
                  | TableSort | class |  | includes/tablesort.class.inc | Query extender class for tablesort queries. | 
          
                  | TableSortTest | class |  | modules/simpletest/tests/tablesort.test | Test unicode handling features implemented in unicode.inc. | 
          
                  | TaxonomyEFQTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests the functionality of EntityFieldQuery for taxonomy entities. | 
          
                  | TaxonomyHooksTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests for taxonomy hook invocation. | 
          
                  | TaxonomyLanguageFunctionalTest | class |  | modules/taxonomy/tests/taxonomy.test | Tests setting languages for taxonomy. | 
          
                  | TaxonomyLegacyTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Test for legacy node bug. | 
          
                  | TaxonomyLoadMultipleUnitTest | class |  | modules/taxonomy/tests/taxonomy.test | Test the taxonomy_term_load_multiple() function. | 
          
                  | TaxonomyQueryAlterTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests that appropriate query tags are added. | 
          
                  | TaxonomyRSSTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests the rendering of term reference fields in RSS feeds. | 
          
                  | TaxonomyTerm | class |  | modules/taxonomy/taxonomy.entity.inc | Defines the taxonomy term entity. | 
          
                  | TaxonomyTermController | class |  | modules/taxonomy/taxonomy.entity.inc | Controller class for taxonomy terms. | 
          
                  | TaxonomyTermFieldMultipleVocabularyTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests a taxonomy term reference field that allows multiple vocabularies. | 
          
                  | TaxonomyTermFieldTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests for taxonomy term field and formatter. | 
          
                  | TaxonomyTermIndexTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests the hook implementations that maintain the taxonomy index. | 
          
                  | TaxonomyTermTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests for taxonomy term functions. | 
          
                  | TaxonomyTermUnitTest | class |  | modules/taxonomy/tests/taxonomy.test | Unit tests for taxonomy term functions. | 
          
                  | TaxonomyThemeTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Tests for verifying that taxonomy pages use the correct theme. | 
          
                  | TaxonomyTokenReplaceTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Test taxonomy token replacement in strings. | 
          
                  | TaxonomyViewsHandlerRelationshipNodeTermDataTest | class |  | modules/taxonomy/tests/taxonomy_views_handler_relationship_node_term_data.test | Tests the relationship_node_term_data handler. | 
          
                  | TaxonomyVocabulary | class |  | modules/taxonomy/taxonomy_vocabulary.class.inc | Taxonomy vocabularies allow the grouping of taxonomy terms. | 
          
                  | TaxonomyVocabularyFunctionalTest | class |  | modules/taxonomy/tests/taxonomy.test | Tests the taxonomy vocabulary interface. | 
          
                  | TaxonomyVocabularyUnitTest | class |  | modules/taxonomy/tests/taxonomy.test | Tests for taxonomy vocabulary functions. | 
          
                  | TaxonomyWebTestCase | class |  | modules/taxonomy/tests/taxonomy.test | Provides common helper methods for Taxonomy module tests. | 
          
                  | TestEntity | class |  | modules/entity/tests/entity_test/entity_test.entity.inc | Test class for the test_entity entity type. | 
          
                  | TestEntity | class |  | modules/field/tests/field_test/field_test.class.inc | Test class for the test_entity entity type. | 
          
                  | TestEntityBundleController | class |  | modules/field/tests/field_test/field_test.controller.inc | Controller class for the test_entity_bundle entity type. | 
          
                  | TestFieldEntity | class |  | modules/field/tests/field_test/field_test.class.inc | Test class for the test_entity entity type. | 
          
                  | TestFileTransfer | class |  | modules/simpletest/tests/filetransfer.test | Mock FileTransfer object for test case. | 
          
                  | TestingMailSystem | class |  | modules/system/system.mail.inc | A mail sending implementation that captures sent messages to a variable. | 
          
                  | TextFieldTestCase | class |  | modules/field/modules/text/tests/text.test |  | 
          
                  | TextSummaryTestCase | class |  | modules/field/modules/text/tests/text.test |  | 
          
                  | TextTranslationTestCase | class |  | modules/field/modules/text/tests/text.test |  | 
          
                  | ThemeDatetime | class |  | modules/simpletest/tests/theme.test | Tests for theme_datetime(). | 
          
                  | ThemeDebugMarkupTestCase | class |  | modules/simpletest/tests/theme.test | Tests for theme debug markup. | 
          
                  | ThemeFastTestCase | class |  | modules/simpletest/tests/theme.test | Tests autocompletion not loading registry. |