BootstrapWatchdogTestCase::testWatchdogLogging in core/modules/simpletest/tests/bootstrap.test
EnableDisableTestCase::assertSuccessfulDisableAndUninstall in core/modules/system/tests/system.test
Disables and uninstalls a module and asserts that it was done correctly.
EnableDisableTestCase::testEnableDisable in core/modules/system/tests/system.test
Test that all core modules can be enabled, disabled and uninstalled.