class BackendCompilerPassTest

class BackendCompilerPassTest extends UnitTestCase {

  /**
   * The tested backend compiler pass.
   *
   * @var \Drupal\Core\DependencyInjection\Compiler\BackendCompilerPass
   */
  protected $backendPass;

  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->backendPass = new BackendCompilerPass();
  }

  /**
   * Tests the process method.
   *
   * @covers ::process
   */
  public function testProcess() {

    // Add a container with no set default_backend.
    $prefix = __NAMESPACE__ . '\\ServiceClass';
    $service = (new Definition($prefix . 'Default'))
      ->addTag('backend_overridable');
    $container = $this
      ->getMysqlContainer($service);
    $this->backendPass
      ->process($container);
    $this
      ->assertEquals($prefix . 'Default', get_class($container
      ->get('service')));

    // Set the default_backend so the mysql service should be used.
    $container = $this
      ->getMysqlContainer($service);
    $container
      ->setParameter('default_backend', 'mysql');
    $this->backendPass
      ->process($container);
    $this
      ->assertEquals($prefix . 'Mysql', get_class($container
      ->get('service')));

    // Configure a manual alias for the service, so ensure that it is not
    // overridden by the default backend.
    $container = $this
      ->getMysqlContainer($service);
    $container
      ->setParameter('default_backend', 'mysql');
    $container
      ->setDefinition('mariadb.service', new Definition($prefix . 'MariaDb'));
    $container
      ->setAlias('service', new Alias('mariadb.service'));
    $this->backendPass
      ->process($container);
    $this
      ->assertEquals($prefix . 'MariaDb', get_class($container
      ->get('service')));

    // Check the database driver is the default.
    $container = $this
      ->getSqliteContainer($service);
    $this->backendPass
      ->process($container);
    $this
      ->assertEquals($prefix . 'Sqlite', get_class($container
      ->get('service')));

    // Test the opt out.
    $container = $this
      ->getSqliteContainer($service);
    $container
      ->setParameter('default_backend', '');
    $this->backendPass
      ->process($container);
    $this
      ->assertEquals($prefix . 'Default', get_class($container
      ->get('service')));

    // Set the mysql and the DrivertestMysql service, now the DrivertestMysql
    // service, as it is the driver override, should be used.
    $container = $this
      ->getDrivertestMysqlContainer($service);
    $container
      ->setDefinition('mysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassMysql'));
    $container
      ->setDefinition('DrivertestMysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassDrivertestMysql'));
    $this->backendPass
      ->process($container);
    $this
      ->assertEquals($prefix . 'DrivertestMysql', get_class($container
      ->get('service')));

    // Set the mysql service, now the mysql service, as it is the database_type
    // override, should be used.
    $container = $this
      ->getDrivertestMysqlContainer($service);
    $container
      ->setDefinition('mysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassMysql'));
    $this->backendPass
      ->process($container);
    $this
      ->assertEquals($prefix . 'Mysql', get_class($container
      ->get('service')));

    // Set the DrivertestMysql service, now the DrivertestMysql service, as it
    // is the driver override, should be used.
    $container = $this
      ->getDrivertestMysqlContainer($service);
    $container
      ->setDefinition('DrivertestMysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassDrivertestMysql'));
    $this->backendPass
      ->process($container);
    $this
      ->assertEquals($prefix . 'DrivertestMysql', get_class($container
      ->get('service')));
  }

  /**
   * Creates a container with a sqlite database service in it.
   *
   * This is necessary because the container clone does not clone the parameter
   * bag so the setParameter() call effects the parent container as well.
   *
   * @param $service
   *   The service definition.
   *
   * @return \Symfony\Component\DependencyInjection\ContainerBuilder
   */
  protected function getSqliteContainer($service) {
    $container = new ContainerBuilder();
    $container
      ->setDefinition('service', $service);
    $container
      ->setDefinition('sqlite.service', new Definition(__NAMESPACE__ . '\\ServiceClassSqlite'));
    $mock = $this
      ->getMockBuilder('Drupal\\sqlite\\Driver\\Database\\sqlite\\Connection')
      ->onlyMethods([])
      ->disableOriginalConstructor()
      ->getMock();
    $container
      ->set('database', $mock);
    return $container;
  }

  /**
   * Creates a container with a mysql database service definition in it.
   *
   * This is necessary because the container clone does not clone the parameter
   * bag so the setParameter() call effects the parent container as well.
   *
   * @param $service
   *   The service definition.
   *
   * @return \Symfony\Component\DependencyInjection\ContainerBuilder
   */
  protected function getMysqlContainer($service) {
    $container = new ContainerBuilder();
    $container
      ->setDefinition('service', $service);
    $container
      ->setDefinition('mysql.service', new Definition(__NAMESPACE__ . '\\ServiceClassMysql'));
    return $container;
  }

  /**
   * Creates a container with a DrivertestMysql database mock definition in it.
   *
   * This is necessary because the container clone does not clone the parameter
   * bag so the setParameter() call effects the parent container as well.
   *
   * @param $service
   *   The service definition.
   *
   * @return \Symfony\Component\DependencyInjection\ContainerBuilder
   */
  protected function getDrivertestMysqlContainer($service) {
    $container = new ContainerBuilder();
    $container
      ->setDefinition('service', $service);
    $mock = $this
      ->getMockBuilder('Drupal\\driver_test\\Driver\\Database\\DrivertestMysql\\Connection')
      ->onlyMethods([])
      ->disableOriginalConstructor()
      ->getMock();
    $container
      ->set('database', $mock);
    return $container;
  }

}