class ControllerBaseTest

class ControllerBaseTest extends UnitTestCase {
  
  /**
   * The tested controller base class.
   *
   * @var \Drupal\Core\Controller\ControllerBase|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $controllerBase;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    $this->controllerBase = $this->getMockForAbstractClass('Drupal\\Core\\Controller\\ControllerBase');
  }
  
  /**
   * Tests the config method.
   */
  public function testGetConfig() {
    $config_factory = $this->getConfigFactoryStub([
      'config_name' => [
        'key' => 'value',
      ],
      'config_name2' => [
        'key2' => 'value2',
      ],
    ]);
    $container = $this->createMock('Symfony\\Component\\DependencyInjection\\ContainerInterface');
    $container->expects($this->once())
      ->method('get')
      ->with('config.factory')
      ->willReturn($config_factory);
    \Drupal::setContainer($container);
    $config_method = new \ReflectionMethod('Drupal\\Core\\Controller\\ControllerBase', 'config');
    $config_method->setAccessible(TRUE);
    // Call config twice to ensure that the container is just called once.
    $config = $config_method->invoke($this->controllerBase, 'config_name');
    $this->assertEquals('value', $config->get('key'));
    $config = $config_method->invoke($this->controllerBase, 'config_name2');
    $this->assertEquals('value2', $config->get('key2'));
  }

}