function DriverSpecificConnectionUnitTestBase::testOpenQueryPrefetchClose

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

File

core/tests/Drupal/KernelTests/Core/Database/DriverSpecificConnectionUnitTestBase.php, line 134

Class

DriverSpecificConnectionUnitTestBase

Tests management of database connections.

Namespace

Code

public function testOpenQueryPrefetchClose() : void {
    // Execute a query.
    Database::getConnection(static::TEST_TARGET_CONNECTION)->query($this->getQuery()['show_tables'])
        ->fetchCol();
    // Close the connection.
    Database::closeConnection(static::TEST_TARGET_CONNECTION);
    // Wait 20ms to give the database engine sufficient time to react.
    usleep(20000);
    // Verify that we are back to the original connection count.
    $this->assertNoConnection($this->id);
}