BackdropUnitTestCase::setUp in core/modules/simpletest/backdrop_web_test_case.php

Sets up unit test environment.

BackdropWebTestCase::changeDatabasePrefix in core/modules/simpletest/backdrop_web_test_case.php

Changes the database connection to the prefixed one.

BackupDatabase::getDatabaseConnection in core/includes/backup/backup.database.inc

Get the db connection for the specified db.

ConnectionUnitTest::addConnection in core/modules/simpletest/tests/database_test.test

Adds a new database connection info to Database.

ConnectionUnitTest::setUp in core/modules/simpletest/tests/database_test.test

Sets up unit test environment.

DatabaseConnectionTestCase::testConnectionOptions in core/modules/simpletest/tests/database_test.test

Tests the connection options of the active database.

DatabaseConnectionTestCase::testConnectionRouting in core/modules/simpletest/tests/database_test.test

Test that connections return appropriate connection objects.

DatabaseConnectionTestCase::testConnectionRoutingOverride in core/modules/simpletest/tests/database_test.test

Test that connections return appropriate connection objects.

DatabaseLoggingTestCase::testEnableMultiConnectionLogging in core/modules/simpletest/tests/database_test.test

Test that we can log queries separately on different connections.

DatabaseLoggingTestCase::testEnableTargetLogging in core/modules/simpletest/tests/database_test.test

Test that we can log queries against multiple targets on the same connection.

DatabaseTasks::checkUtf8mb4 in core/includes/install.inc

Check the engine version.

DatabaseTasks::connect in core/includes/install.inc

Check if we can connect to the database.