class ConfigValidationTest

class ConfigValidationTest extends KernelTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'config_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installConfig('config_test');
  }
  
  /**
   * This test ensures that validation is not recursed too many times.
   */
  public function testValidationCallCount() : void {
    $typed_config_manager = \Drupal::service('config.typed');
    /** @var \Drupal\Core\Config\Schema\TypedConfigInterface $typed_config */
    ConfigValidation::$calledValidators = [];
    $typed_config = $typed_config_manager->get('config_test.validation');
    $results = $typed_config->validate();
    $this->assertCount(0, $results);
    $called_validators = ConfigValidation::$calledValidators;
    $this->assertArrayHasKey('validateMapping', $called_validators);
    $this->assertArrayHasKey('validateCats', $called_validators);
    $this->assertArrayHasKey('validateCatCount', $called_validators);
    $this->assertSame(1, $called_validators['validateMapping']);
    $this->assertSame(1, $called_validators['validateCats']);
    $this->assertSame(1, $called_validators['validateCatCount']);
  }

}