class EntityReferenceFileUploadTest

class EntityReferenceFileUploadTest extends BrowserTestBase {
  use TestFileCreationTrait;
  protected static $modules = [
    'node',
    'file',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * The name of a content type that will reference $referencedType.
   *
   * @var string
   */
  protected $referencingType;
  
  /**
   * The name of a content type that will be referenced by $referencingType.
   *
   * @var string
   */
  protected $referencedType;
  
  /**
   * Node id.
   *
   * @var int
   */
  protected $nodeId;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    // Create "referencing" and "referenced" node types.
    $referencing = $this->drupalCreateContentType();
    $this->referencingType = $referencing->id();
    $referenced = $this->drupalCreateContentType();
    $this->referencedType = $referenced->id();
    $this->nodeId = $this->drupalCreateNode([
      'type' => $referenced->id(),
    ])
      ->id();
    FieldStorageConfig::create([
      'field_name' => 'test_field',
      'entity_type' => 'node',
      'translatable' => FALSE,
      'entity_types' => [],
      'settings' => [
        'target_type' => 'node',
      ],
      'type' => 'entity_reference',
      'cardinality' => FieldStorageDefinitionInterface::CARDINALITY_UNLIMITED,
    ])->save();
    FieldConfig::create([
      'label' => 'Entity reference field',
      'field_name' => 'test_field',
      'entity_type' => 'node',
      'required' => TRUE,
      'bundle' => $referencing->id(),
      'settings' => [
        'handler' => 'default',
        'handler_settings' => [
          // Reference a single vocabulary.
'target_bundles' => [
            $referenced->id(),
          ],
        ],
      ],
    ])
      ->save();
    // Create a file field.
    $file_field_name = 'file_field';
    $field_storage = FieldStorageConfig::create([
      'field_name' => $file_field_name,
      'entity_type' => 'node',
      'type' => 'file',
    ]);
    $field_storage->save();
    FieldConfig::create([
      'entity_type' => 'node',
      'field_storage' => $field_storage,
      'bundle' => $referencing->id(),
      'label' => $this->randomMachineName() . '_label',
    ])
      ->save();
    /** @var \Drupal\Core\Entity\EntityDisplayRepositoryInterface $display_repository */
    $display_repository = \Drupal::service('entity_display.repository');
    $display_repository->getViewDisplay('node', $referencing->id())
      ->setComponent('test_field')
      ->setComponent($file_field_name)
      ->save();
    $display_repository->getFormDisplay('node', $referencing->id())
      ->setComponent('test_field', [
      'type' => 'entity_reference_autocomplete',
    ])
      ->setComponent($file_field_name, [
      'type' => 'file_generic',
    ])
      ->save();
  }
  
  /**
   * Tests that the autocomplete input element does not cause ajax fatal.
   */
  public function testFileUpload() {
    $user1 = $this->drupalCreateUser([
      'access content',
      "create {$this->referencingType} content",
    ]);
    $this->drupalLogin($user1);
    $test_file = current($this->getTestFiles('text'));
    $edit['files[file_field_0]'] = \Drupal::service('file_system')->realpath($test_file->uri);
    $this->drupalGet('node/add/' . $this->referencingType);
    $this->submitForm($edit, 'Upload');
    $this->assertSession()
      ->statusCodeEquals(200);
    $edit = [
      'title[0][value]' => $this->randomMachineName(),
      'test_field[0][target_id]' => $this->nodeId,
    ];
    $this->submitForm($edit, 'Save');
    $this->assertSession()
      ->statusCodeEquals(200);
  }

}