FilterUnitTestCase::testFilterXSS in core/modules/filter/tests/filter.test

Tests limiting allowed tags and XSS prevention.

FilterUnitTestCase::testHtmlFilter in core/modules/filter/tests/filter.test

Tests filter settings, defaults, access restrictions and similar.

FilterUnitTestCase::testNoFollowFilter in core/modules/filter/tests/filter.test

Tests the spam deterrent.