class FormErrorHandlerFileUploadTest

class FormErrorHandlerFileUploadTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'node',
    'file',
    'field_ui',
    'inline_form_errors',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    // Create a node type for testing.
    NodeType::create([
      'type' => 'page',
      'name' => 'page',
    ])->save();
    // Add a file field.
    FieldStorageConfig::create([
      'entity_type' => 'node',
      'field_name' => 'field_ief_file',
      'type' => 'file',
      'cardinality' => 1,
    ])->save();
    FieldConfig::create([
      'field_name' => 'field_ief_file',
      'label' => 'field_ief_file',
      'entity_type' => 'node',
      'bundle' => 'page',
      'required' => TRUE,
      'settings' => [
        'file_extensions' => 'png gif jpg jpeg',
      ],
    ])->save();
    EntityFormDisplay::create([
      'targetEntityType' => 'node',
      'bundle' => 'page',
      'mode' => 'default',
      'status' => TRUE,
    ])->setComponent('field_ief_file', [
      'type' => 'file_generic',
      'settings' => [],
    ])
      ->save();
    EntityViewDisplay::create([
      'targetEntityType' => 'node',
      'bundle' => 'page',
      'mode' => 'default',
      'status' => TRUE,
      'label' => 'hidden',
      'type' => 'file_default',
    ])->save();
    // Create and login a user.
    $account = $this->drupalCreateUser([
      'access content',
      'access administration pages',
      'administer nodes',
      'create page content',
    ]);
    $this->drupalLogin($account);
  }
  
  /**
   * Tests that the required field error is displayed as inline error message.
   */
  public function testFileUploadErrors() {
    $this->drupalGet('node/add/page');
    $edit = [
      'edit-title-0-value' => $this->randomString(),
    ];
    $this->submitForm($edit, 'Save');
    $error_text = $this->getSession()
      ->getPage()
      ->find('css', '.field--name-field-ief-file .form-item--error-message')
      ->getText();
    $this->assertEquals('field_ief_file field is required.', $error_text);
  }

}