BackdropTestCase::assert in core/modules/simpletest/backdrop_web_test_case.php

Internal helper: stores the assert.

BackdropTestCase::deleteAssert in core/modules/simpletest/backdrop_web_test_case.php

Delete an assertion record by message ID.

BackdropTestCase::insertAssert in core/modules/simpletest/backdrop_web_test_case.php

Store an assertion from outside the testing context.