BootstrapPageCacheTestCase::testConditionalRequests in core/modules/simpletest/tests/bootstrap.test

Test support for requests containing If-Modified-Since and If-None-Match headers.

BootstrapPageCacheTestCase::testPageCache in core/modules/simpletest/tests/bootstrap.test

Test cache headers.

DrupalWebTestCase::drupalHead in core/includes/drupal.classes.inc

FileDownloadTest::testPrivateFileTransfer in core/modules/simpletest/tests/file.test

Test the private file transfer system.

FileDownloadTest::testPublicFileTransfer in core/modules/simpletest/tests/file.test

Test the public file transfer system.