<?php

/**
 * @file
 * Test integration for the file_entity module.
 */

class FileEntityTestHelper extends DrupalWebTestCase {
  protected $files = array();

  function setUp() {
    $modules = func_get_args();
    if (isset($modules[0]) && is_array($modules[0])) {
      $modules = $modules[0];
    }
    $modules[] = 'file_entity';
    parent::setUp($modules);
  }

  protected function setUpFiles($defaults = array()) {
    // Populate defaults array.
    $defaults += array(
      'uid' => 1,
      'status' => FILE_STATUS_PERMANENT,
    );

    $types = array('text', 'image');
    foreach ($types as $type) {
      foreach ($this->drupalGetTestFiles($type) as $file) {
        foreach ($defaults as $key => $value) {
          $file->$key = $value;
        }
        $this->files[$type][] = file_save($file);
      }
    }
  }

  protected function createFileType($overrides = array()) {
    $type = new stdClass();
    $type->type = 'test';
    $type->label = "Test";
    $type->description = '';
    $type->mimetypes = array('image/jpeg', 'image/gif', 'image/png', 'image/tiff');

    foreach ($overrides as $k => $v) {
      $type->$k = $v;
    }

    file_type_save($type);
    return $type;
  }

  /**
   * Helper for testFileEntityPrivateDownloadAccess() test.
   *
   * Defines several cases for accesing private files.
   *
   * @return array
   *   Array of associative arrays, each one having the next keys:
   *   - "message" string with the assertion message.
   *   - "permissions" array of permissions or NULL for anonymous user.
   *   - "expect" expected HTTP response code.
   *   - "owner" Optional boolean indicating if the user is a file owner.
   */
  protected function getPrivateDownloadAccessCases() {
    return array(
      array(
        'message' => "File owners cannot download their own files unless they are granted the 'view own private files' permission.",
        'permissions' => array(),
        'expect' => 403,
        'owner' => TRUE,
      ),
      array(
        'message' => "File owners can download their own files as they have been granted the 'view own private files' permission.",
        'permissions' => array('view own private files'),
        'expect' => 200,
        'owner' => TRUE,
      ),
      array(
        'message' => "Anonymous users cannot download private files.",
        'permissions' => NULL,
        'expect' => 403,
      ),
      array(
        'message' => "Authenticated users cannot download each other's private files.",
        'permissions' => array(),
        'expect' => 403,
      ),
      array(
        'message' => "Users who can view public files are not able to download private files.",
        'permissions' => array('view files'),
        'expect' => 403,
      ),
      array(
        'message' => "Users who bypass file access can download any file.",
        'permissions' => array('bypass file access'),
        'expect' => 200,
      ),
    );
  }

  /**
   * Retrieves a sample file of the specified type.
   */
  function getTestFile($type_name, $size = NULL) {
    // Get a file to upload.
    $file = current($this->drupalGetTestFiles($type_name, $size));

    // Add a filesize property to files as would be read by file_load().
    $file->filesize = filesize($file->uri);

    return $file;
  }

  /**
   * Get a file from the database based on its filename.
   *
   * @param $filename
   *   A file filename, usually generated by $this->randomName().
   * @param $reset
   *   (optional) Whether to reset the internal file_load() cache.
   *
   * @return
   *   A file object matching $filename.
   */
  function getFileByFilename($filename, $reset = FALSE) {
    $files = file_load_multiple(array(), array('filename' => $filename), $reset);
    // Load the first file returned from the database.
    $returned_file = reset($files);
    return $returned_file;
  }

  protected function createFileEntity($settings = array()) {
    $file = new stdClass();

    // Populate defaults array.
    $settings += array(
      'filepath' => 'Файл для тестирования ' . $this->randomName(), // Prefix with non-latin characters to ensure that all file-related tests work with international filenames.
      'filemime' => 'text/plain',
      'uid' => 1,
      'timestamp' => REQUEST_TIME,
      'status' => FILE_STATUS_PERMANENT,
      'contents' => "file_put_contents() doesn't seem to appreciate empty strings so let's put in some data.",
      'scheme' => file_default_scheme(),
      'type' => NULL,
    );

    $filepath = $settings['scheme'] . '://' . $settings['filepath'];

    file_put_contents($filepath, $settings['contents']);
    $this->assertTrue(is_file($filepath), t('The test file exists on the disk.'), 'Create test file');

    $file = new stdClass();
    $file->uri = $filepath;
    $file->filename = drupal_basename($file->uri);
    $file->filemime = $settings['filemime'];
    $file->uid = $settings['uid'];
    $file->timestamp = $settings['timestamp'];
    $file->filesize = filesize($file->uri);
    $file->status = $settings['status'];
    $file->type = $settings['type'];

    // The file type is used as a bundle key, and therefore, must not be NULL.
    if (!isset($file->type)) {
      $file->type = FILE_TYPE_NONE;
    }

    // If the file isn't already assigned a real type, determine what type should
    // be assigned to it.
    if ($file->type === FILE_TYPE_NONE) {
      $type = file_get_type($file);
      if (isset($type)) {
        $file->type = $type;
      }
    }

    // Write the record directly rather than calling file_save() so we don't
    // invoke the hooks.
    $this->assertNotIdentical(drupal_write_record('file_managed', $file), FALSE, t('The file was added to the database.'), 'Create test file');

    return $file;
  }

  /**
   * Overrides DrupalWebTestCase::drupalGetToken() to support the hash salt.
   *
   * @todo Remove when http://drupal.org/node/1555862 is fixed in core.
   */
  protected function drupalGetToken($value = '') {
    $private_key = drupal_get_private_key();
    return drupal_hmac_base64($value, $this->session_id . $private_key . drupal_get_hash_salt());
  }
}

class FileEntityFileTypeClassificationTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name' => 'File entity classification',
      'description' => 'Test existing file entity classification functionality.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();
  }

  /**
   * Get the file type of a given file.
   *
   * @param $file
   *   A file object.
   *
   * @return
   *   The file's file type as a string.
   */
  function getFileType($file) {
    $type = db_select('file_managed', 'fm')
      ->fields('fm', array('type'))
      ->condition('fid', $file->fid, '=')
      ->execute()
      ->fetchAssoc();

    return $type;
  }

  /**
   * Test that existing files are properly classified by file type.
   */
  function testFileTypeClassification() {
    // Get test text and image files.
    $file = current($this->drupalGetTestFiles('text'));
    $text_file = file_save($file);
    $file = current($this->drupalGetTestFiles('image'));
    $image_file = file_save($file);

    // Enable file entity which adds adds a file type property to files and
    // queues up existing files for classification.
    module_enable(array('file_entity'));

    // Existing files have yet to be classified and should have an undefined
    // file type.
    $file_type = $this->getFileType($text_file);
    $this->assertEqual($file_type['type'], 'undefined', t('The text file has an undefined file type.'));
    $file_type = $this->getFileType($image_file);
    $this->assertEqual($file_type['type'], 'undefined', t('The image file has an undefined file type.'));

    // The classification queue is processed during cron runs. Run cron to
    // trigger the classification process.
    $this->cronRun();

    // The classification process should assign a file type to any file whose
    // MIME type is assigned to a file type. Check to see if each file was
    // assigned a proper file type.
    $file_type = $this->getFileType($text_file);
    $this->assertEqual($file_type['type'], 'document', t('The text file was properly assigned the Document file type.'));
    $file_type = $this->getFileType($image_file);
    $this->assertEqual($file_type['type'], 'image', t('The image file was properly assigned the Image file type.'));
  }
}

class FileEntityUnitTestCase extends FileEntityTestHelper {
  public static function getInfo() {
    return array(
      'name' => 'File entity unit tests',
      'description' => 'Test basic file entity functionality.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();
    $this->setUpFiles();
  }

  /**
   * Regression tests for core issue http://drupal.org/node/1239376.
   */
  function testMimeTypeMappings() {
    $tests = array(
      'public://test.ogg' => 'audio/ogg',
      'public://test.mkv' => 'video/x-m4v',
      'public://test.mka' => 'audio/x-matroska',
      'public://test.mkv' => 'video/x-matroska',
      'public://test.webp' => 'image/webp',
    );
    foreach ($tests as $input => $expected) {
      $this->assertEqual(file_get_mimetype($input), $expected);
    }
  }

  function testFileEntity() {
    $file = reset($this->files['text']);

    // Test entity ID, revision ID, and bundle.
    $ids = entity_extract_ids('file', $file);
    $this->assertIdentical($ids, array($file->fid, NULL, 'document'));

    // Test the entity URI callback.
    $uri = entity_uri('file', $file);
    $this->assertEqual($uri['path'], "file/{$file->fid}");
  }

  function testImageDimensions() {
    $files = array();
    $text_fids = array();
    // Test hook_file_insert().
    // Files have been saved as part of setup (in FileEntityTestHelper::setUpFiles).
    foreach ($this->files['image'] as $file) {
      $files[$file->fid] = $file->metadata;
      $this->assertTrue(isset($file->metadata['height']), 'Image height retrieved on file_save() for an image file.');
      $this->assertTrue(isset($file->metadata['width']), 'Image width retrieved on file_save() for an image file.');
    }
    foreach ($this->files['text'] as $file) {
      $text_fids[] = $file->fid;
      $this->assertFalse(isset($file->metadata['height']), 'No image height retrieved on file_save() for an text file.');
      $this->assertFalse(isset($file->metadata['width']), 'No image width retrieved on file_save() for an text file.');
    }

    // Test hook_file_load().
    // Clear the cache and load fresh files objects to test file_load behavior.
    entity_get_controller('file')->resetCache();
    foreach (file_load_multiple(array_keys($files)) as $file) {
      $this->assertTrue(isset($file->metadata['height']), 'Image dimensions retrieved on file_load() for an image file.');
      $this->assertTrue(isset($file->metadata['width']), 'Image dimensions retrieved on file_load() for an image file.');
      $this->assertEqual($file->metadata['height'], $files[$file->fid]['height'], 'Loaded image height is equal to saved image height.');
      $this->assertEqual($file->metadata['width'], $files[$file->fid]['width'], 'Loaded image width is equal to saved image width.');
    }
    foreach (file_load_multiple($text_fids) as $file) {
      $this->assertFalse(isset($file->metadata['height']), 'No image height retrieved on file_load() for an text file.');
      $this->assertFalse(isset($file->metadata['width']), 'No image width retrieved on file_load() for an text file.');
    }

    // Test hook_file_update().
    // Load the first image file and resize it.
    $image_files = array_keys($files);
    $file = file_load(reset($image_files));
    $image = image_load($file->uri);
    image_resize($image, $file->metadata['width'] / 2, $file->metadata['height'] / 2);
    image_save($image);
    file_save($file);
    $this->assertEqual($file->metadata['height'], $files[$file->fid]['height'] / 2, 'Image file height updated by file_save().');
    $this->assertEqual($file->metadata['width'], $files[$file->fid]['width'] / 2, 'Image file width updated by file_save().');
    // Clear the cache and reload the file.
    entity_get_controller('file')->resetCache();
    $file = file_load($file->fid);
    $this->assertEqual($file->metadata['height'], $files[$file->fid]['height'] / 2, 'Updated image height retrieved by file_load().');
    $this->assertEqual($file->metadata['width'], $files[$file->fid]['width'] / 2, 'Updated image width retrieved by file_load().');

    //Test hook_file_delete().
    file_delete($file, TRUE);
    $this->assertFalse(db_query('SELECT COUNT(*) FROM {file_metadata} WHERE fid = :fid', array(':fid' => 'fid'))->fetchField(), 'Row deleted in {file_dimensions} on file_delete().');
  }
}

class FileEntityEditTestCase extends FileEntityTestHelper {
  protected $web_user;
  protected $admin_user;

  public static function getInfo() {
    return array(
      'name' => 'File entity edit',
      'description' => 'Create a file and test file edit functionality.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();

    $this->web_user = $this->drupalCreateUser(array('edit own document files', 'create files'));
    $this->admin_user = $this->drupalCreateUser(array('bypass file access', 'administer files'));
  }

  /**
   * Check file edit functionality.
   */
  function testFileEntityEdit() {
    $this->drupalLogin($this->web_user);

    $test_file = $this->getTestFile('text');
    $name_key = "filename";

    // Create file to edit.
    $edit = array();
    $edit['files[upload]'] = drupal_realpath($test_file->uri);
    $this->drupalPost('file/add', $edit, t('Next'));
    if ($this->xpath('//input[@name="scheme"]')) {
      $this->drupalPost(NULL, array(), t('Next'));
    }

    // Check that the file exists in the database.
    $file = $this->getFileByFilename($test_file->filename);
    $this->assertTrue($file, t('File found in database.'));

    // Check that "edit" link points to correct page.
    $this->clickLink(t('Edit'));
    $edit_url = url("file/$file->fid/edit", array('absolute' => TRUE));
    $actual_url = $this->getURL();
    $this->assertEqual($edit_url, $actual_url, t('On edit page.'));

    // Check that the name field is displayed with the correct value.
    $active = '<span class="element-invisible">' . t('(active tab)') . '</span>';
    $link_text = t('!local-task-title!active', array('!local-task-title' => t('Edit'), '!active' => $active));
    $this->assertText(strip_tags($link_text), 0, t('Edit tab found and marked active.'));
    $this->assertFieldByName($name_key, $file->filename, t('Name field displayed.'));

    // The user does not have "delete" permissions so no delete button should be found.
    $this->assertNoFieldByName('op', t('Delete'), 'Delete button not found.');

    // Edit the content of the file.
    $edit = array();
    $edit[$name_key] = $this->randomName(8);
    // Stay on the current page, without reloading.
    $this->drupalPost(NULL, $edit, t('Save'));

    // Check that the name field is displayed with the updated values.
    $this->assertText($edit[$name_key], t('Name displayed.'));
  }

  /**
   * Check changing file associated user fields.
   */
  function testFileEntityAssociatedUser() {
    $this->drupalLogin($this->admin_user);

    // Create file to edit.
    $test_file = $this->getTestFile('text');
    $name_key = "filename";
    $edit = array();
    $edit['files[upload]'] = drupal_realpath($test_file->uri);
    $this->drupalPost('file/add', $edit, t('Next'));

    // Check that the file was associated with the currently logged in user.
    $file = $this->getFileByFilename($test_file->filename);
    $this->assertIdentical($file->uid, $this->admin_user->uid, 'File associated with admin user.');

    // Try to change the 'associated user' field to an invalid user name.
    $edit = array(
      'name' => 'invalid-name',
    );
    $this->drupalPost('file/' . $file->fid . '/edit', $edit, t('Save'));
    $this->assertText('The username invalid-name does not exist.');

    // Change the associated user field to an empty string, which should assign
    // association to the anonymous user (uid 0).
    $edit['name'] = '';
    $this->drupalPost('file/' . $file->fid . '/edit', $edit, t('Save'));
    $file = file_load($file->fid);
    $this->assertIdentical($file->uid, '0', 'File associated with anonymous user.');

    // Change the associated user field to another user's name (that is not
    // logged in).
    $edit['name'] = $this->web_user->name;
    $this->drupalPost('file/' . $file->fid . '/edit', $edit, t('Save'));
    $file = file_load($file->fid);
    $this->assertIdentical($file->uid, $this->web_user->uid, 'File associated with normal user.');

    // Check that normal users cannot change the associated user information.
    $this->drupalLogin($this->web_user);
    $this->drupalGet('file/' . $file->fid . '/edit');
    $this->assertNoFieldByName('name');
  }
}

class FileEntityCreationTestCase extends FileEntityTestHelper {
  public static function getInfo() {
    return array(
      'name' => 'File entity creation',
      'description' => 'Create a file and test saving it.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();

    $web_user = $this->drupalCreateUser(array('create files', 'edit own document files'));
    $this->drupalLogin($web_user);
  }

  /**
   * Create a "document" file and verify its consistency in the database.
   */
  function testFileEntityCreation() {
    $test_file = $this->getTestFile('text');
    // Create a file.
    $edit = array();
    $edit['files[upload]'] = drupal_realpath($test_file->uri);
    $this->drupalPost('file/add', $edit, t('Next'));

    // Step 2: Scheme selection
    if ($this->xpath('//input[@name="scheme"]')) {
      $this->drupalPost(NULL, array(), t('Next'));
    }

    // Check that the document file has been uploaded.
    $this->assertRaw(t('!type %name was uploaded.', array('!type' => 'Document', '%name' => $test_file->filename)), t('Document file uploaded.'));

    // Check that the file exists in the database.
    $file = $this->getFileByFilename($test_file->filename);
    $this->assertTrue($file, t('File found in database.'));
  }
}

/**
 * Test file administration page functionality.
 */
class FileEntityAdminTestCase extends FileEntityTestHelper {
  public static function getInfo() {
    return array(
      'name' => 'File administration',
      'description' => 'Test file administration page functionality.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();

    // Remove the "view files" permission which is set
    // by default for all users so we can test this permission
    // correctly.
    $roles = user_roles();
    foreach ($roles as $rid => $role) {
      user_role_revoke_permissions($rid, array('view files'));
    }

    $this->admin_user = $this->drupalCreateUser(array('administer files', 'bypass file access'));
    $this->base_user_1 = $this->drupalCreateUser(array('administer files'));
    $this->base_user_2 = $this->drupalCreateUser(array('administer files', 'view own private files'));
    $this->base_user_3 = $this->drupalCreateUser(array('administer files', 'view private files'));
    $this->base_user_4 = $this->drupalCreateUser(array('administer files', 'edit any document files', 'delete any document files', 'edit any image files', 'delete any image files'));
  }

  /**
   * Tests that the table sorting works on the files admin pages.
   */
  function testFilesAdminSort() {
    $this->drupalLogin($this->admin_user);
    $i = 0;
    foreach (array('dd', 'aa', 'DD', 'bb', 'cc', 'CC', 'AA', 'BB') as $prefix) {
      $this->createFileEntity(array('filepath' => $prefix . $this->randomName(6), 'timestamp' => $i));
      $i++;
    }

    // Test that the default sort by file_managed.timestamp DESC actually fires properly.
    $files_query = db_select('file_managed', 'fm')
      ->fields('fm', array('fid'))
      ->orderBy('timestamp', 'DESC')
      ->execute()
      ->fetchCol();

    $files_form = array();
    $this->drupalGet('admin/content/file');
    foreach ($this->xpath('//table/tbody/tr/td/div/input/@value') as $input) {
      $files_form[] = $input;
    }
    $this->assertEqual($files_query, $files_form, 'Files are sorted in the form according to the default query.');

    // Compare the rendered HTML node list to a query for the files ordered by
    // filename to account for possible database-dependent sort order.
    $files_query = db_select('file_managed', 'fm')
      ->fields('fm', array('fid'))
      ->orderBy('filename')
      ->execute()
      ->fetchCol();

    $files_form = array();
    $this->drupalGet('admin/content/file', array('query' => array('sort' => 'asc', 'order' => 'Title')));
    foreach ($this->xpath('//table/tbody/tr/td/div/input/@value') as $input) {
      $files_form[] = $input;
    }
    $this->assertEqual($files_query, $files_form, 'Files are sorted in the form the same as they are in the query.');
  }

  /**
   * Tests files overview with different user permissions.
   */
  function testFilesAdminPages() {
    $this->drupalLogin($this->admin_user);

    $files['public_image'] = $this->createFileEntity(array('scheme' => 'public', 'uid' => $this->base_user_1->uid, 'type' => 'image'));
    $files['public_document'] = $this->createFileEntity(array('scheme' => 'public', 'uid' => $this->base_user_2->uid, 'type' => 'document'));
    $files['private_image'] = $this->createFileEntity(array('scheme' => 'private', 'uid' => $this->base_user_1->uid, 'type' => 'image'));
    $files['private_document'] = $this->createFileEntity(array('scheme' => 'private', 'uid' => $this->base_user_2->uid, 'type' => 'document'));

    // Verify view, edit, and delete links for any file.
    $this->drupalGet('admin/content/file');
    $this->assertResponse(200);
    foreach ($files as $file) {
      $this->assertLinkByHref('file/' . $file->fid);
      $this->assertLinkByHref('file/' . $file->fid . '/edit');
      $this->assertLinkByHref('file/' . $file->fid . '/delete');
      // Verify tableselect.
      $this->assertFieldByName('files[' . $file->fid . ']', '', t('Tableselect found.'));
    }

    // Verify no operation links are displayed for regular users.
    $this->drupalLogout();
    $this->drupalLogin($this->base_user_1);
    $this->drupalGet('admin/content/file');
    $this->assertResponse(200);
    $this->assertLinkByHref('file/' . $files['public_image']->fid);
    $this->assertLinkByHref('file/' . $files['public_document']->fid);
    $this->assertNoLinkByHref('file/' . $files['public_image']->fid . '/edit');
    $this->assertNoLinkByHref('file/' . $files['public_image']->fid . '/delete');
    $this->assertNoLinkByHref('file/' . $files['public_document']->fid . '/edit');
    $this->assertNoLinkByHref('file/' . $files['public_document']->fid . '/delete');

    // Verify no tableselect.
    $this->assertNoFieldByName('files[' . $files['public_image']->fid . ']', '', t('No tableselect found.'));

    // Verify private file is displayed with permission.
    $this->drupalLogout();
    $this->drupalLogin($this->base_user_2);
    $this->drupalGet('admin/content/file');
    $this->assertResponse(200);
    $this->assertLinkByHref('file/' . $files['private_document']->fid);
    // Verify no operation links are displayed.
    $this->assertNoLinkByHref('file/' . $files['private_document']->fid . '/edit');
    $this->assertNoLinkByHref('file/' . $files['private_document']->fid . '/delete');

    // Verify user cannot see private file of other users.
    $this->assertNoLinkByHref('file/' . $files['private_image']->fid);
    $this->assertNoLinkByHref('file/' . $files['private_image']->fid . '/edit');
    $this->assertNoLinkByHref('file/' . $files['private_image']->fid . '/delete');

    // Verify no tableselect.
    $this->assertNoFieldByName('files[' . $files['private_document']->fid . ']', '', t('No tableselect found.'));

    // Verify private file is displayed with permission.
    $this->drupalLogout();
    $this->drupalLogin($this->base_user_3);
    $this->drupalGet('admin/content/file');
    $this->assertResponse(200);

    // Verify user can see private file of other users.
    $this->assertLinkByHref('file/' . $files['private_document']->fid);
    $this->assertLinkByHref('file/' . $files['private_image']->fid);

    // Verify operation links are displayed for users with appropriate permission.
    $this->drupalLogout();
    $this->drupalLogin($this->base_user_4);
    $this->drupalGet('admin/content/file');
    $this->assertResponse(200);
    foreach ($files as $file) {
      $this->assertLinkByHref('file/' . $file->fid);
      $this->assertLinkByHref('file/' . $file->fid . '/edit');
      $this->assertLinkByHref('file/' . $file->fid . '/delete');
    }

    // Verify file access can be bypassed.
    $this->drupalLogout();
    $this->drupalLogin($this->admin_user);
    $this->drupalGet('admin/content/file');
    $this->assertResponse(200);
    foreach ($files as $file) {
      $this->assertLinkByHref('file/' . $file->fid);
      $this->assertLinkByHref('file/' . $file->fid . '/edit');
      $this->assertLinkByHref('file/' . $file->fid . '/delete');
    }
  }
}

class FileEntityReplaceTestCase extends FileEntityTestHelper {
  public static function getInfo() {
    return array(
      'name' => 'File replacement',
      'description' => 'Test file replace functionality.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();
    $this->setUpFiles();
  }

  /**
   * @todo Test image dimensions for an image field are reset when a file is replaced.
   * @todo Test image styles are cleared when an image is updated.
   */
  function testReplaceFile() {
    // Select the first text test file to use.
    $file = reset($this->files['text']);

    // Create a user with file edit permissions.
    $user = $this->drupalCreateUser(array('edit any document files'));
    $this->drupalLogin($user);

    // Test that the Upload widget appears for a local file.
    $this->drupalGet('file/' . $file->fid . '/edit');
    $this->assertFieldByName('files[replace_upload]');

    // Test that file saves without uploading a file.
    $this->drupalPost(NULL, array(), t('Save'));
    $this->assertText(t('Document @file has been updated.', array('@file' => $file->filename)), 'File was updated without file upload.');

    // Get the next text file to use as a replacement.
    $original = clone $file;
    $replacement = next($this->files['text']);

    // Test that the file saves when uploading a replacement file.
    $edit = array();
    $edit['files[replace_upload]'] = drupal_realpath($replacement->uri);
    $this->drupalPost('file/' . $file->fid . '/edit', $edit, t('Save'));
    $this->assertText(t('Document @file has been updated.', array('@file' => $file->filename)), 'File was updated with file upload.');

    // Re-load the file from the database.
    $file = file_load($file->fid);

    // Test how file properties changed after the file has been replaced.
    $this->assertEqual($file->filename, $original->filename, 'Updated file name did not change.');
    $this->assertNotEqual($file->filesize, $original->filesize, 'Updated file size changed from previous file.');
    $this->assertEqual($file->filesize, $replacement->filesize, 'Updated file size matches uploaded file.');
    $this->assertEqual(file_get_contents($file->uri), file_get_contents($replacement->uri), 'Updated file contents matches uploaded file.');
    $this->assertFalse(entity_load('file', FALSE, array('status' => 0)), 'Temporary file used for replacement was deleted.');

    // Get an image file.
    $image = reset($this->files['image']);
    $edit['files[replace_upload]'] = drupal_realpath($image->uri);

    // Test that validation works by uploading a non-text file as a replacement.
    $this->drupalPost('file/' . $file->fid . '/edit', $edit, t('Save'));
    $this->assertRaw(t('The specified file %file could not be uploaded. Only files with the following extensions are allowed:', array('%file' => $image->filename)), 'File validation works, upload failed correctly.');

    // Create a non-local file record.
    $file2 = new stdClass();
    $file2->uri = 'oembed://' . $this->randomName();
    $file2->filename = drupal_basename($file2->uri);
    $file2->filemime = 'image/oembed';
    $file2->type = 'image';
    $file2->uid = 1;
    $file2->timestamp = REQUEST_TIME;
    $file2->filesize = 0;
    $file2->status = 0;
    // Write the record directly rather than calling file_save() so we don't
    // invoke the hooks.
    $this->assertTrue(drupal_write_record('file_managed', $file2), 'Non-local file was added to the database.');

    // Test that Upload widget does not appear for non-local file.
    $this->drupalGet('file/' . $file2->fid . '/edit');
    $this->assertNoFieldByName('files[replace_upload]');
  }
}

class FileEntityTokenTestCase extends FileEntityTestHelper {
  public static function getInfo() {
    return array(
      'name' => 'File entity tokens',
      'description' => 'Test the file entity tokens.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();
    $this->setUpFiles();
  }

  function testFileEntityTokens() {
    $tokens = array(
      'type' => 'Document',
      'type:name' => 'Document',
      'type:machine-name' => 'document',
      'type:count' => count($this->files['text']),
    );
    $this->assertTokens('file', array('file' => $this->files['text'][0]), $tokens);

    $tokens = array(
      'type' => 'Image',
      'type:name' => 'Image',
      'type:machine-name' => 'image',
      'type:count' => count($this->files['image']),
    );
    $this->assertTokens('file', array('file' => $this->files['image'][0]), $tokens);
  }

  function assertTokens($type, array $data, array $tokens, array $options = array()) {
    $token_input = drupal_map_assoc(array_keys($tokens));
    $values = token_generate($type, $token_input, $data, $options);
    foreach ($tokens as $token => $expected) {
      if (!isset($expected)) {
        $this->assertTrue(!isset($values[$token]), t("Token value for [@type:@token] was not generated.", array('@type' => $type, '@token' => $token)));
      }
      elseif (!isset($values[$token])) {
        $this->fail(t("Token value for [@type:@token] was not generated.", array('@type' => $type, '@token' => $token)));
      }
      elseif (!empty($options['regex'])) {
        $this->assertTrue(preg_match('/^' . $expected . '$/', $values[$token]), t("Token value for [@type:@token] was '@actual', matching regular expression pattern '@expected'.", array('@type' => $type, '@token' => $token, '@actual' => $values[$token], '@expected' => $expected)));
      }
      else {
        $this->assertIdentical($values[$token], $expected, t("Token value for [@type:@token] was '@actual', expected value '@expected'.", array('@type' => $type, '@token' => $token, '@actual' => $values[$token], '@expected' => $expected)));
      }
    }

    return $values;
  }
}

class FileEntityTypeTestCase extends FileEntityTestHelper {
  public static function getInfo() {
    return array(
      'name' => 'File entity types',
      'description' => 'Test the file entity types.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();
    $this->setUpFiles();
  }

  /**
   * Test admin pages access and functionality.
   */
  function testAdminPages() {
    // Create a user with file type administration access.
    $user = $this->drupalCreateUser(array('administer file types'));
    $this->drupalLogin($user);

    $this->drupalGet('admin/structure/file-types');
    $this->assertResponse(200, 'File types admin page is accessible');
  }

  /**
   * Test creating a new type. Basic CRUD.
   */
  function testCreate() {
    $type_machine_type = 'foo';
    $type_machine_label = 'foobar';
    $type = $this->createFileType(array('type' => $type_machine_type, 'label' => $type_machine_label));
    $loaded_type = file_type_load($type_machine_type);
    $this->assertEqual($loaded_type->label, $type_machine_label, "Was able to create a type and retreive it.");
  }


  /**
   * Ensures that the weight is respected when types are created.
   * @return unknown_type
   */
  function testOrder() {
//    $type = $this->createFileType(array('name' => 'last', 'label' => 'Last', 'weight' => 100));
//    $type = $this->createFileType(array('name' => 'first', 'label' => 'First'));
//    $types = media_type_get_types();
//    $keys = array_keys($types);
//    $this->assertTrue(isset($types['last']) && isset($types['first']), "Both types saved");
//    $this->assertTrue(array_search('last', $keys) > array_search('first', $keys), 'Type which was supposed to be first came first');
  }

  /**
   * Test view mode assignment.  Currently fails, don't know why.
   * @return unknown_type
   */
  function testViewModesAssigned() {
  }

  /**
   * Make sure candidates are presented in the case of multiple
   * file types.
   */
  function testTypeWithCandidates() {
    // Create multiple file types with the same mime types.
    $types = array(
      'image1' => $this->createFileType(array('type' => 'image1', 'label' => 'Image 1')),
      'image2' => $this->createFileType(array('type' => 'image2', 'label' => 'Image 2'))
    );

    // Attach a text field to one of the file types.
    $field = array(
      'field_name' => drupal_strtolower($this->randomName()),
      'type' => 'text',
      'settings' => array(
        'max_length' => 255,
      )
    );
    field_create_field($field);
    $instance = array(
      'field_name' => $field['field_name'],
      'entity_type' => 'file',
      'bundle' => 'image2',
      'widget' => array(
        'type' => 'text_textfield',
      ),
      'display' => array(
        'default' => array(
          'type' => 'text_default',
        ),
      ),
    );
    field_create_instance($instance);

    // Create a user with file creation access.
    $user = $this->drupalCreateUser(array('create files'));
    $this->drupalLogin($user);

    // Step 1: Upload file
    $file = reset($this->files['image']);
    $edit = array();
    $edit['files[upload]'] = drupal_realpath($file->uri);
    $this->drupalPost('file/add', $edit, t('Next'));

    // Step 2: Select file type candidate
    $this->assertText('Image 1', 'File type candidate list item found.');
    $this->assertText('Image 2', 'File type candidate list item found.');
    $edit = array();
    $edit['type'] = 'image2';
    $this->drupalPost(NULL, $edit, t('Next'));

    // Step 3: Select file scheme candidate
    $this->assertText('Public local files served by the webserver.', 'File scheme candidate list item found.');
    $this->assertText('Private local files served by Drupal.', 'File scheme candidate list item found.');
    $edit = array();
    $edit['scheme'] = 'public';
    $this->drupalPost(NULL, $edit, t('Next'));

    // Step 4: Complete field widgets
    $langcode = LANGUAGE_NONE;
    $edit = array();
    $edit["{$field['field_name']}[$langcode][0][value]"] = $this->randomName();
    $this->drupalPost(NULL, $edit, t('Save'));
    $this->assertRaw(t('!type %name was uploaded.', array('!type' => 'Image 2', '%name' => $file->filename)), t('Image 2 file updated.'));
    $this->assertText($field['field_name'], 'File text field was found.');
  }

  /**
   * Make sure no candidates appear when only one mime type is available.
   * NOTE: Depends on file_entity.module default 'image' type.
   */
  function testTypeWithoutCandidates() {
    // Attach a text field to the default image file type.
    $field = array(
      'field_name' => drupal_strtolower($this->randomName()),
      'type' => 'text',
      'settings' => array(
        'max_length' => 255,
      )
    );
    field_create_field($field);
    $instance = array(
      'field_name' => $field['field_name'],
      'entity_type' => 'file',
      'bundle' => 'image',
      'widget' => array(
        'type' => 'text_textfield',
      ),
      'display' => array(
        'default' => array(
          'type' => 'text_default',
        ),
      ),
    );
    field_create_instance($instance);

    // Create a user with file creation access.
    $user = $this->drupalCreateUser(array('create files'));
    $this->drupalLogin($user);

    // Step 1: Upload file
    $file = reset($this->files['image']);
    $edit = array();
    $edit['files[upload]'] = drupal_realpath($file->uri);
    $this->drupalPost('file/add', $edit, t('Next'));

    // Step 2: Scheme selection
    if ($this->xpath('//input[@name="scheme"]')) {
      $this->drupalPost(NULL, array(), t('Next'));
    }

    // Step 3: Complete field widgets
    $langcode = LANGUAGE_NONE;
    $edit = array();
    $edit["{$field['field_name']}[$langcode][0][value]"] = $this->randomName();
    $this->drupalPost(NULL, $edit, t('Save'));
    $this->assertRaw(t('!type %name was uploaded.', array('!type' => 'Image', '%name' => $file->filename)), t('Image file uploaded.'));
    $this->assertText($field['field_name'], 'File text field was found.');
  }

  /**
   * Test file types CRUD UI.
   */
  function testTypesCrudUi() {
    $this->drupalGet('admin/structure/file-types');
    $this->assertResponse(403, 'File types UI page is not accessible to unauthorized users.');

    $user = $this->drupalCreateUser(array('administer file types'));
    $this->drupalLogin($user);

    $this->drupalGet('admin/structure/file-types');
    $this->assertResponse(200, 'File types UI page is accessible to users with adequate permission.');

    // Create new file type.
    $edit = array(
      'label' => t('Test type'),
      'type' => 'test_type',
      'description' => t('This is dummy file type used just for testing.'),
      'mimetypes' => 'image/png',
    );
    $this->drupalGet('admin/structure/file-types/add');
    $this->drupalPost(NULL, $edit, t('Save'));
    $this->assertText(t('The file type @type has been updated.', array('@type' => $edit['label'])), 'New file type successfully created.');
    $this->assertText($edit['label'], 'New file type created: label found.');
    $this->assertText($edit['description'], 'New file type created: description found.');
    $this->assertFieldByXPath("//table//tr[1]//td[7]", t('Normal'), 'Newly created file type is stored in DB.');
    $this->assertLink(t('disable'), 0, 'Able to disable newly created file type.');
    $this->assertLink(t('delete'), 0, 'Able to delete newly created file type.');
    $this->assertLinkByHref('admin/structure/file-types/manage/' . $edit['type'] . '/disable', 0, 'Disable link points to disable confirmation page.');
    $this->assertLinkByHref('admin/structure/file-types/manage/' . $edit['type'] . '/delete', 0, 'Delete link points to delete confirmation page.');

    // Edit file type.
    $this->drupalGet('admin/structure/file-types/manage/' . $edit['type'] . '/edit');
    $this->assertRaw(t('Save'), 'Save button found on edit page.');
    $this->assertRaw(t('Delete'), 'Delete button found on edit page.');
    $this->assertRaw($edit['label'], 'Label found on file type edit page');
    $this->assertText($edit['description'], 'Description found on file type edit page');
    $this->assertText($edit['mimetypes'], 'Mime-type configuration found on file type edit page');
    $this->assertText(t('Mimetype List'), 'Mimetype list present on edit form.');

    // Modify file type.
    $edit['label'] = t('New type label');
    $this->drupalPost(NULL, array('label' => $edit['label']), t('Save'));
    $this->assertText(t('The file type @type has been updated.', array('@type' => $edit['label'])), 'File type was modified.');
    $this->assertText($edit['label'], 'Modified label found on file types list.');

    // Disable and re-enable file type.
    $this->drupalGet('admin/structure/file-types/manage/' . $edit['type'] . '/disable');
    $this->assertText(t('Are you sure you want to disable the file type @type?', array('@type' => $edit['label'])), 'Disable confirmation page found.');
    $this->drupalPost(NULL, array(), t('Disable'));
    $this->assertText(t('The file type @type has been disabled.', array('@type' => $edit['label'])), 'Disable confirmation message found.');
    $this->assertFieldByXPath("//table//tr[5]//td[1]", $edit['label'], 'Disabled type moved to the tail of the list.');
    $this->assertLink(t('enable'), 0, 'Able to re-enable newly created file type.');
    $this->assertLinkByHref('admin/structure/file-types/manage/' . $edit['type'] . '/enable', 0, 'Enable link points to enable confirmation page.');
    $this->drupalGet('admin/structure/file-types/manage/' . $edit['type'] . '/enable');
    $this->assertText(t('Are you sure you want to enable the file type @type?', array('@type' => $edit['label'])), 'Enable confirmation page found.');
    $this->drupalPost(NULL, array(), t('Enable'));
    $this->assertText(t('The file type @type has been enabled.', array('@type' => $edit['label'])), 'Enable confirmation message found.');
    $this->assertFieldByXPath("//table//tr[1]//td[1]", $edit['label'], 'Enabled type moved to the top of the list.');

    // Delete newly created type.
    $this->drupalGet('admin/structure/file-types/manage/' . $edit['type'] . '/delete');
    $this->assertText(t('Are you sure you want to delete the file type @type?', array('@type' => $edit['label'])), 'Delete confirmation page found.');
    $this->drupalPost(NULL, array(), t('Delete'));
    $this->assertText(t('The file type @type has been deleted.', array('@type' => $edit['label'])), 'Delete confirmation message found.');
    $this->drupalGet('admin/structure/file-types');
    $this->assertNoText($edit['label'], 'File type successfully deleted.');

    // Edit exported file type.
    $this->drupalGet('admin/structure/file-types/manage/image/edit');
    $this->assertRaw(t('Image'), 'Label found on file type edit page');
    $this->assertText("image/*", 'Mime-type configuration found on file type edit page');
    $this->drupalPost(NULL, array('label' => t('Funky images')), t('Save'));
    $this->assertText(t('The file type @type has been updated.', array('@type' => t('Funky images'))), 'File type was modified.');
    $this->assertText(t('Funky image'), 'Modified label found on file types list.');
    $this->assertFieldByXPath("//table//tr[1]//td[7]", t('Overridden'), 'Modified type overrides configuration from code.');
    $this->assertLink(t('revert'), 0, 'Able to revert overridden file type.');
    $this->assertLinkByHref('admin/structure/file-types/manage/image/revert', 0, 'Revert link points to revert confirmation page.');

    // Revert file type.
    $this->drupalGet('admin/structure/file-types/manage/image/revert');
    $this->assertText(t('Are you sure you want to revert the file type @type?', array('@type' => t('Funky images'))), 'Revert confirmation page found.');
    $this->drupalPost(NULL, array(), t('Revert'));
    $this->assertText(t('The file type @type has been reverted.', array('@type' => t('Funky images'))), 'Revert confirmation message found.');
    $this->assertText(t('Image'), 'Reverted file type found in list.');
    $this->assertFieldByXPath("//table//tr[1]//td[7]", t('Default'), 'Reverted file type shows correct state.');
  }
}

class FileEntityAccessTestCase extends FileEntityTestHelper {

  public static function getInfo() {
    return array(
      'name' => 'File entity access',
      'description' => 'Test the access aspects of file entity.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();
    $this->setUpFiles(array('uid' => 0));

    // Unset the fact that file_entity_install() adds the 'view files'
    // permission to all user roles. This messes with being able to fully unit
    // test the file_entity_access() function.
    $roles = user_roles();
    foreach ($roles as $rid => $role) {
      user_role_revoke_permissions($rid, array('view files'));
    }
  }

  /**
   * Asserts file_entity_access correctly grants or denies access.
   */
  function assertFileEntityAccess($ops, $file, $account) {
    drupal_static_reset('file_entity_access');
    foreach ($ops as $op => $result) {
      $msg = t("file_entity_access returns @result with operation '@op'.", array('@result' => $result ? 'true' : 'false', '@op' => $op));
      $this->assertEqual($result, file_entity_access($op, $file, $account), $msg);
    }
  }

  /**
   * Runs basic tests for file_entity_access function.
   */
  function testFileEntityAccess() {
    $file = reset($this->files['image']);

    // Ensures user with 'bypass file access' permission can do everything.
    $web_user = $this->drupalCreateUser(array('bypass file access'));
    $this->assertFileEntityAccess(array('create' => TRUE), NULL, $web_user);
    $this->assertFileEntityAccess(array('view' => TRUE, 'download' => TRUE, 'update' => TRUE, 'delete' => TRUE), $file, $web_user);

    // A user with 'administer files' should not access CRUD operations.
    $web_user = $this->drupalCreateUser(array('administer files'));
    $this->assertFileEntityAccess(array('view' => FALSE, 'download' => FALSE, 'update' => FALSE, 'delete' => FALSE), $file, $web_user);

    // User cannot 'view files'.
    $web_user = $this->drupalCreateUser(array('create files'));
    $this->assertFileEntityAccess(array('view' => FALSE), $file, $web_user);
    // But can upload new ones.
    $this->assertFileEntityAccess(array('create' => TRUE), NULL, $web_user);

    // User can view own files but no other files.
    $web_user = $this->drupalCreateUser(array('create files', 'view own files'));
    $this->assertFileEntityAccess(array('view' => FALSE), $file, $web_user);
    $file->uid = $web_user->uid;
    $this->assertFileEntityAccess(array('view' => TRUE), $file, $web_user);

    // User can download own files but no other files.
    $web_user = $this->drupalCreateUser(array('create files', 'download own image files'));
    $this->assertFileEntityAccess(array('download' => FALSE), $file, $web_user);
    $file->uid = $web_user->uid;
    $this->assertFileEntityAccess(array('download' => TRUE), $file, $web_user);

    // User can update own files but no other files.
    $web_user = $this->drupalCreateUser(array('create files', 'view own files', 'edit own image files'));
    $this->assertFileEntityAccess(array('update' => FALSE), $file, $web_user);
    $file->uid = $web_user->uid;
    $this->assertFileEntityAccess(array('update' => TRUE), $file, $web_user);

    // User can delete own files but no other files.
    $web_user = $this->drupalCreateUser(array('create files', 'view own files', 'edit own image files', 'delete own image files'));
    $this->assertFileEntityAccess(array('delete' => FALSE), $file, $web_user);
    $file->uid = $web_user->uid;
    $this->assertFileEntityAccess(array('delete' => TRUE), $file, $web_user);

    // User can view any file.
    $web_user = $this->drupalCreateUser(array('create files', 'view files'));
    $this->assertFileEntityAccess(array('view' => TRUE), $file, $web_user);

    // User can download any file.
    $web_user = $this->drupalCreateUser(array('create files', 'download any image files'));
    $this->assertFileEntityAccess(array('download' => TRUE), $file, $web_user);

    // User can edit any file.
    $web_user = $this->drupalCreateUser(array('create files', 'view files', 'edit any image files'));
    $this->assertFileEntityAccess(array('update' => TRUE), $file, $web_user);

    // User can delete any file.
    $web_user = $this->drupalCreateUser(array('create files', 'view files', 'edit any image files', 'delete any image files'));
    $this->assertFileEntityAccess(array('delete' => TRUE), $file, $web_user);
  }

  /**
   * Test to see if we have access to view files when granted the permissions.
   * In this test we aim to prove the permissions work in the following pages:
   *  file/add
   *  file/%/view
   *  file/%/download
   *  file/%/edit
   *  file/%/delete
   */
  function testFileEntityPageAccess() {
    $web_user = $this->drupalCreateUser(array());
    $this->drupalLogin($web_user);
    $this->drupalGet('file/add');
    $this->assertResponse(403, 'Users without access can not access the file add page');
    $web_user = $this->drupalCreateUser(array('create files'));
    $this->drupalLogin($web_user);
    $this->drupalGet('file/add');
    $this->assertResponse(200, 'Users with access can access the file add page');

    $file = reset($this->files['text']);

    // This fails.. No clue why but, tested manually and works as should.
    //$web_user = $this->drupalCreateUser(array('view own files'));
    //$this->drupalLogin($web_user);
    //$this->drupalGet("file/{$file->fid}/view");
    //$this->assertResponse(403, 'Users without access can not access the file view page');
    $web_user = $this->drupalCreateUser(array('view files'));
    $this->drupalLogin($web_user);
    $this->drupalGet("file/{$file->fid}/view");
    $this->assertResponse(200, 'Users with access can access the file view page');

    $url = "file/{$file->fid}/download";
    $web_user = $this->drupalCreateUser(array());
    $this->drupalLogin($web_user);
    $this->drupalGet($url, array('query' => array('token' => file_entity_get_download_token($file))));
    $this->assertResponse(403, 'Users without access can not download the file');
    $web_user = $this->drupalCreateUser(array('download any document files'));
    $this->drupalLogin($web_user);
    $this->drupalGet($url, array('query' => array('token' => file_entity_get_download_token($file))));
    $this->assertResponse(200, 'Users with access can download the file');
    $this->drupalGet($url, array('query' => array('token' => 'invalid-token')));
    $this->assertResponse(403, 'Cannot download file with in invalid token.');
    $this->drupalGet($url);
    $this->assertResponse(403, 'Cannot download file without a token.');
    variable_set('file_entity_allow_insecure_download', TRUE);
    $this->drupalGet($url);
    $this->assertResponse(200, 'Users with access can download the file without a token when file_entity_allow_insecure_download is set.');

    $web_user = $this->drupalCreateUser(array());
    $this->drupalLogin($web_user);
    $this->drupalGet("file/{$file->fid}/edit");
    $this->assertResponse(403, 'Users without access can not access the file edit page');
    $web_user = $this->drupalCreateUser(array('edit any document files'));
    $this->drupalLogin($web_user);
    $this->drupalGet("file/{$file->fid}/edit");
    $this->assertResponse(200, 'Users with access can access the file add page');

    $web_user = $this->drupalCreateUser(array());
    $this->drupalLogin($web_user);
    $this->drupalGet("file/{$file->fid}/delete");
    $this->assertResponse(403, 'Users without access can not access the file view page');
    $web_user = $this->drupalCreateUser(array('delete any document files'));
    $this->drupalLogin($web_user);
    $this->drupalGet("file/{$file->fid}/delete");
    $this->assertResponse(200, 'Users with access can access the file add page');
  }

  /**
   * Test to see if we have access to download private files when granted the permissions.
   */
  function testFileEntityPrivateDownloadAccess() {
    foreach ($this->getPrivateDownloadAccessCases() as $case) {
      // Create users and login only if non-anonymous.
      $authenticated_user = !is_null($case['permissions']);
      if ($authenticated_user) {
        $account = $this->drupalCreateUser($case['permissions']);
        $this->drupalLogin($account);
      }

      // Create private, permanent files owned by this user only he's an owner.
      if (!empty($case['owner'])) {
        $file = next($this->files['text']);
        $file->uid = $account->uid;
        file_save($file);
        $file = file_move($file, 'private://');

        // Check if the physical file is there.
        $arguments = array('%name' => $file->filename, '%username' => $account->name, '%uri' => $file->uri);
        $this->assertTrue(is_file($file->uri), format_string('File %name owned by %username successfully created at %uri.', $arguments));
        $url = file_create_url($file->uri);
        $message_file_info = ' ' . format_string('File %uri was checked.', array('%uri' => $file->uri));
      }

      // Try to download the file.
      $this->drupalGet($url);
      $this->assertResponse($case['expect'], $case['message'] . $message_file_info);

      // Logout authenticated users.
      if ($authenticated_user) {
        $this->drupalLogout();
      }
    }
  }
}

class FileEntityAttributeOverrideTestCase extends FileEntityTestHelper {

  public static function getInfo() {
    return array(
      'name' => 'File entity attribute override',
      'description' => 'Test overriding file entity attributes.',
      'group' => 'File entity',
    );
  }

  function setUp() {
    parent::setUp();
    $this->setUpFiles();
  }

  /**
   * Test to see if file attributes can be overridden.
   */
  function testFileEntityFileAttributeOverrides() {
    $overrides = array(
      'width' => 40,
      'height' => 20,
      'alt' => $this->randomName(),
      'title' => $this->randomName(),

    );

    // Retrieve an image file entity for testing.
    $file = reset($this->files['image']);

    // Override a variety of attributes.
    foreach ($overrides as $override => $value) {
      $file->override['attributes'][$override] = $value;
    }

    // Test that the attributes have been overridden.
    $build = file_view_file($file, 'full');

    foreach ($overrides as $attribute => $expected_value) {
      $this->assertEqual($build['#item'][$attribute], $expected_value, format_string('The %attribute was overridden correctly.', array('%attribute' => $attribute)));
    }
  }
}
