function DriverSpecificConnectionUnitTestBase::testOpenSelectQueryClose

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

File

core/tests/Drupal/KernelTests/Core/Database/DriverSpecificConnectionUnitTestBase.php, line 150

Class

DriverSpecificConnectionUnitTestBase

Tests management of database connections.

Namespace

Code

public function testOpenSelectQueryClose() : void {
    // Create a table.
    $name = 'foo';
    Database::getConnection(static::TEST_TARGET_CONNECTION)->schema()
        ->createTable($name, [
        'fields' => [
            'name' => [
                'type' => 'varchar',
                'length' => 255,
            ],
        ],
    ]);
    // Execute a query.
    Database::getConnection(static::TEST_TARGET_CONNECTION)->select('foo', 'f')
        ->fields('f', [
        'name',
    ])
        ->execute()
        ->fetchAll();
    // Drop the table.
    Database::getConnection(static::TEST_TARGET_CONNECTION)->schema()
        ->dropTable($name);
    // 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);
}