uploadFileAndGetRemoteFilePath example

$images = $this->getTestFiles('image');
    $images = array_slice($images, 0, 5);

    $paths = [];
    foreach ($images as $image) {
      $paths[] = $file_system->realpath($image->uri);
    }

    $remote_paths = [];
    foreach ($paths as $path) {
      $remote_paths[] = $web_driver->uploadFileAndGetRemoteFilePath($path);
    }

    $multiple_field = $this->assertSession()->elementExists('xpath', '//input[@multiple]');
    $multiple_field->setValue(implode("\n", $remote_paths));
    $this->assertSession()->waitForElementVisible('css', '[data-drupal-selector="edit-images-4-preview"]');
    $this->getSession()->getPage()->findButton('Save')->click();

    $node = Node::load(1);
    foreach ($paths as $delta => $path) {
      $node_image = $node->{$field_name}[$delta];
      $original_image = $image_factory->get($path);
      

$web_driver = $this->getSession()->getDriver();
    $file_system = \Drupal::service('file_system');

    $files = array_slice($this->getTestFiles('text'), 0, 3);
    $real_paths = [];
    foreach ($files as $file) {
      $real_paths[] = $file_system->realpath($file->uri);
    }
    $remote_paths = [];
    foreach ($real_paths as $path) {
      $remote_paths[] = $web_driver->uploadFileAndGetRemoteFilePath($path);
    }

    // Tests that uploading multiple remote files works with remote path.     $this->drupalGet("node/add/$type_name");
    $multiple_field = $this->getSession()->getPage()->findField('files[test_file_field_1_0][]');
    $multiple_field->setValue(implode("\n", $remote_paths));
    $this->assertSession()->assertWaitOnAjaxRequest();
    $this->assertSession()->pageTextContains("Field {$field_name} can only hold {$cardinality} values but there were 3 uploaded. The following files have been omitted as a result: text-2.txt.");
  }

  /** * Retrieves a sample file of the specified type. * * @return \Drupal\file\FileInterface * The new unsaved file entity. */

// Assert the existing items are remembered when adding and removing media.     $checkbox = $page->findField("Select $existing_media_name");
    $checkbox->click();
    // Assert we can add multiple files.     $this->assertTrue($assert_session->fieldExists('Add files')->hasAttribute('multiple'));
    // Create a list of new files to upload.     $filenames = [];
    $remote_paths = [];
    foreach (range(1, 4) as $i) {
      $path = $file_system->copy($png_image->uri, 'public://');
      $filenames[] = $file_system->basename($path);
      $remote_paths[] = $driver->uploadFileAndGetRemoteFilePath($file_system->realpath($path));
    }
    $page->findField('Add files')->setValue(implode("\n", $remote_paths));
    // Assert the media item fields are shown and the vertical tabs are no     // longer shown.     $this->assertMediaAdded();
    // Assert all files have been added.     $assert_session->fieldValueEquals('media[0][fields][name][0][value]', $filenames[0]);
    $assert_session->fieldValueEquals('media[1][fields][name][0][value]', $filenames[1]);
    $assert_session->fieldValueEquals('media[2][fields][name][0][value]', $filenames[2]);
    $assert_session->fieldValueEquals('media[3][fields][name][0][value]', $filenames[3]);
    // Set alt texts for items 1 and 2, leave the alt text empty for items 3

// Create a list of new files to upload.     $filenames = $remote_paths = [];
    for ($i = 0; $i < $number; $i++) {
      $path = $file_system->copy($this->image->uri, 'public://');
      $path = $file_system->realpath($path);
      $this->assertNotEmpty($path);
      $this->assertFileExists($path);

      $filenames[] = $file_system->basename($path);
      $remote_paths[] = $this->getSession()
        ->getDriver()
        ->uploadFileAndGetRemoteFilePath($path);
    }
    $page = $this->getSession()->getPage();
    $page->fillField('Add files', implode("\n", $remote_paths));
    $this->assertMediaAdded();
    $assert_session = $this->assertSession();
    foreach ($filenames as $i => $filename) {
      $assert_session->fieldValueEquals("media[$i][fields][name][0][value]", $filename);
      $page->fillField("media[$i][fields][field_media_test_image][0][alt]", $filename);
    }
  }

  

$file_system = \Drupal::service('file_system');
    $entity = EntityTest::create();
    $entity->save();

    $files = array_slice($this->getTestFiles('text'), 0, 3);
    $real_paths = [];
    foreach ($files as $file) {
      $real_paths[] = $file_system->realpath($file->uri);
    }
    $remote_paths = [];
    foreach ($real_paths as $path) {
      $remote_paths[] = $web_driver->uploadFileAndGetRemoteFilePath($path);
    }

    // Tests that uploading multiple remote files works with remote path.     $this->drupalGet($entity->toUrl('edit-form'));
    $multiple_field = $this->assertSession()->elementExists('xpath', '//input[@multiple]');
    $multiple_field->setValue(implode("\n", $remote_paths));
    $this->assertSession()->assertWaitOnAjaxRequest();
    $this->getSession()->getPage()->findButton('Save')->click();
    $entity = EntityTest::load($entity->id());
    $this->assertCount(3, $entity->field_file);
  }

}