| AJAXElementValidation | modules/simpletest/tests/ajax.test | Miscellaneous Ajax tests using ajax_test module. |
| BlockInvalidRegionTestCase | modules/block/block.test | Tests that a block assigned to an invalid region triggers the warning. |
| DatabaseInvalidDataTestCase | modules/simpletest/tests/database_test.test | Test invalid data handling. |
| FieldValidationException | modules/field/field.attach.inc | Exception thrown by field_attach_validate() on field validation errors. |
| FileFieldValidateTestCase | modules/file/tests/file.test | Tests various validations. |
| FileValidateTest | modules/simpletest/tests/file.test | Tests the file_validate() function.. |
| FileValidatorTest | modules/simpletest/tests/file.test | This will run tests against the file validation functions (file_validate_*). |
| FormValidationTestCase | modules/simpletest/tests/form.test | Test form validation handlers. |
| ImageFieldValidateTestCase | modules/image/image.test | Test class to check for various validations. |
| InvalidMergeQueryException | includes/database/database.inc | Exception thrown for merge queries that do not make semantic sense. |
| ListDynamicValuesValidationTestCase | modules/field/modules/list/tests/list.test | Tests the List field allowed values function. |
| OpenIDInvalidIdentifierTransitionTestCase | modules/openid/openid.test | Test account registration using Simple Registration and Attribute Exchange. |
| UserValidateCurrentPassCustomForm | modules/user/user.test | Tests user_validate_current_pass on a custom form. |
| UserValidationTestCase | modules/user/user.test | |
| ValidUrlTestCase | modules/simpletest/tests/common.test | Test for valid_url(). |
| ViewsArgumentValidatorTest | tests/views_argument_validator.test | Tests Views argument validators. |
| ViewsUserArgumentValidate | tests/user/views_user_argument_validate.test | Tests views user argument argument handler. |
| views_plugin_argument_validate | plugins/views_plugin_argument_validate.inc | Base argument validator plugin to provide basic functionality. |
| views_plugin_argument_validate_node | modules/node/views_plugin_argument_validate_node.inc | Validate whether an argument is an acceptable node. |
| views_plugin_argument_validate_numeric | plugins/views_plugin_argument_validate_numeric.inc | Validate whether an argument is numeric or not. |
| views_plugin_argument_validate_php | plugins/views_plugin_argument_validate_php.inc | Provide PHP code to validate whether or not an argument is ok. |
| views_plugin_argument_validate_taxonomy_term | modules/taxonomy/views_plugin_argument_validate_taxonomy_term.inc | Validate whether an argument is an acceptable node. |
| views_plugin_argument_validate_user | modules/user/views_plugin_argument_validate_user.inc | Validate whether an argument is a valid user. |
| XMLRPCValidator1IncTestCase | modules/simpletest/tests/xmlrpc.test | |