class BundleConstraintValidatorTest

class BundleConstraintValidatorTest extends KernelTestBase {
  
  /**
   * The typed data manager to use.
   *
   * @var \Drupal\Core\TypedData\TypedDataManager
   */
  protected $typedData;
  protected static $modules = [
    'node',
    'field',
    'text',
    'user',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->installEntitySchema('user');
    $this->typedData = $this->container
      ->get('typed_data_manager');
  }
  
  /**
   * Tests bundle constraint validation.
   */
  public function testValidation() {
    // Test with multiple values.
    $this->assertValidation([
      'foo',
      'bar',
    ]);
    // Test with a single string value as well.
    $this->assertValidation('foo');
  }
  
  /**
   * Executes the BundleConstraintValidator test for a given bundle.
   *
   * @param string|array $bundle
   *   Bundle/bundles to use as constraint option.
   *
   * @internal
   */
  protected function assertValidation($bundle) : void {
    // Create a typed data definition with a Bundle constraint.
    $definition = DataDefinition::create('entity_reference')->addConstraint('Bundle', $bundle);
    // Test the validation.
    $node = $this->container
      ->get('entity_type.manager')
      ->getStorage('node')
      ->create([
      'type' => 'foo',
    ]);
    $typed_data = $this->typedData
      ->create($definition, $node);
    $violations = $typed_data->validate();
    $this->assertEquals(0, $violations->count(), 'Validation passed for correct value.');
    // Test the validation when an invalid value is passed.
    $page_node = $this->container
      ->get('entity_type.manager')
      ->getStorage('node')
      ->create([
      'type' => 'baz',
    ]);
    $typed_data = $this->typedData
      ->create($definition, $page_node);
    $violations = $typed_data->validate();
    $this->assertEquals(1, $violations->count(), 'Validation failed for incorrect value.');
    // Make sure the information provided by a violation is correct.
    $violation = $violations[0];
    $this->assertEquals(t('The entity must be of bundle %bundle.', [
      '%bundle' => implode(', ', (array) $bundle),
    ]), $violation->getMessage(), 'The message for invalid value is correct.');
    $this->assertEquals($typed_data, $violation->getRoot(), 'Violation root is correct.');
    $this->assertEquals($page_node, $violation->getInvalidValue(), 'The invalid value is set correctly in the violation.');
  }

}