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

Tests Database::closeConnection() without query.

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

Tests Database::closeConnection() with a query.

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

Tests Database::closeConnection() with a query and custom prefetch method.

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

Tests Database::closeConnection() with a select query.