TranslationTestCase::setUp in core/modules/translation/tests/translation.test

Sets up a Backdrop site for running functional and integration tests.

TranslationTestCase::testLanguageSwitcherBlockIntegration in core/modules/translation/tests/translation.test

Tests that the language switcher block alterations work as intended.

TranslationTestCase::testLanguageSwitchLinks in core/modules/translation/tests/translation.test

Checks that the language switch links behave properly.