class FileSaveUploadTest

class FileSaveUploadTest extends KernelTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'file',
    'file_test',
    'file_validator_test',
    'user',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $filename = 'test.bbb';
    vfsStream::newFile($filename)->at($this->vfsRoot)
      ->withContent('test');
    $request = new Request();
    $request->files
      ->set('files', [
      'file' => new UploadedFile(path: vfsStream::url("root/{$filename}"), originalName: $filename, mimeType: 'text/plain', error: \UPLOAD_ERR_OK, test: TRUE),
    ]);
    $request->setSession(new Session(new MockArraySessionStorage()));
    $requestStack = new RequestStack();
    $requestStack->push($request);
    $this->container
      ->set('request_stack', $requestStack);
  }
  
  /**
   * Tests file_save_upload() with empty extensions.
   */
  public function testFileSaveUploadEmptyExtensions() : void {
    // Allow all extensions.
    $validators = [
      'FileExtension' => [],
    ];
    $files = file_save_upload('file', $validators);
    $this->assertCount(1, $files);
    $file = $files[0];
    // @todo work out why move_uploaded_file() is failing.
    $this->assertFalse($file);
    $messages = \Drupal::messenger()->messagesByType(MessengerInterface::TYPE_ERROR);
    $this->assertNotEmpty($messages);
    $this->assertEquals('File upload error. Could not move uploaded file.', $messages[0]);
  }

}