<?php
// $Id$

/**
 *  @file
 *  This provides SimpleTests for the core file handling functionality.
 *  These include FileValidateTest and FileSaveTest.
 */

/**
 *  This will run tests against the file validation functions (file_validate_*).
 */
class FileValidateTest extends DrupalWebTestCase {
  /**
   * Implementation of getInfo().
   */
  function getInfo() {
    return array(
      'name' => t('File validation'),
      'description' => t('Tests the functions used to validate uploaded files.'),
      'group' => t('File'),
    );
  }

  /**
   * Implementation of setUp().
   */
  function setUp() {
    $this->image = new stdClass();
    $this->image->filepath = 'misc/druplicon.png';
    $this->iamge->filename = basename($this->image->filepath);

    $this->non_image = new stdClass();
    $this->non_image->filepath = 'misc/jquery.js';
    $this->non_image->filename = basename($this->non_image->filepath);

    parent::setUp();
  }

  /**
   * Test the file_validate_extensions() function.
   */
  function testFileValidateExtensions() {
    global $user;
    $original_user = $user;
    session_save_session(FALSE);


    // Run these test as uid = 1
    $user = user_load(array('uid' => 1));

    $file = new stdClass();
    $file->filename = 'asdf.txt';
    $errors = file_validate_extensions($file, 'asdf txt pork');
    $this->assertEqual(count($errors), 0, t("Valid extension accepted."), 'File');

    $file->filename = 'asdf.txt';
    $errors = file_validate_extensions($file, 'exe png');
    $this->assertEqual(count($errors), 0, t("Invalid extension also accepted -- they're uid 1."), 'File');


    // Run these test as a regular user
    $user = $this->drupalCreateUser();

    $file = new stdClass();
    $file->filename = 'asdf.txt';
    $errors = file_validate_extensions($file, 'asdf txt pork');
    $this->assertEqual(count($errors), 0, t("Valid extension accepted."), 'File');

    $file->filename = 'asdf.txt';
    $errors = file_validate_extensions($file, 'exe png');
    $this->assertEqual(count($errors), 1, t("Invalid extension blocked."), 'File');


    $user = $original_user;
    session_save_session(TRUE);
  }

  /**
   *  This ensures a specific file is actually an image.
   */
  function testFileValidateIsImage() {
    $this->assertTrue(file_exists($this->image->filepath), t('The image being tested exists.'), 'File');
    $errors = file_validate_is_image($this->image);
    $this->assertEqual(count($errors), 0, t("No error reported for our image file."), 'File');

    $this->assertTrue(file_exists($this->non_image->filepath), t('The non-image being tested exists.'), 'File');
    $errors = file_validate_is_image($this->non_image);
    $this->assertEqual(count($errors), 1, t("An error reported for our non-image file."), 'File');
  }

  /**
   *  This ensures the resolution of a specific file is within bounds.
   *  The image will be resized if it's too large.
   */
  function testFileValidateImageResolution() {
    // Non-images
    $errors = file_validate_image_resolution($this->non_image);
    $this->assertEqual(count($errors), 0, t("Shouldn't get any errors for a non-image file."), 'File');
    $errors = file_validate_image_resolution($this->non_image, '50x50', '100x100');
    $this->assertEqual(count($errors), 0, t("Don't check the resolution on non files."), 'File');

    // Minimum size
    $errors = file_validate_image_resolution($this->image);
    $this->assertEqual(count($errors), 0, t("No errors for an image when there is no minimum or maximum resolution."), 'File');
    $errors = file_validate_image_resolution($this->image, 0, '200x1');
    $this->assertEqual(count($errors), 1, t("Got an error for an image that wasn't wide enough"), 'File');
    $errors = file_validate_image_resolution($this->image, 0, '1x200');
    $this->assertEqual(count($errors), 1, t("Got an error for an image that wasn't tall enough"), 'File');
    $errors = file_validate_image_resolution($this->image, 0, '200x200');
    $this->assertEqual(count($errors), 1, t("Small images report an error."), 'File');

    // Maximum size
    if (image_get_toolkit()) {
      // Copy the image so that the original doesn't get resized.
      $temp_dir = file_directory_temp();
      copy(realpath('misc/druplicon.png'), realpath($temp_dir) .'/druplicon.png');
      $this->image->filepath = $temp_dir .'/druplicon.png';

      $errors = file_validate_image_resolution($this->image, '10x5');
      $this->assertEqual(count($errors), 0, t("No errors should be reported when an oversized image can be scaled down."), 'File');

      $info = image_get_info($this->image->filepath);
      $this->assertTrue($info['width'] <= 10, t("Image scaled to correct width."), 'File');
      $this->assertTrue($info['height'] <= 5, t("Image scaled to correct height."), 'File');

      unlink(realpath($temp_dir .'/druplicon.png'));
    }
    else {
      // TODO: should check that the error is returned if no toolkit is available.
      $errors = file_validate_image_resolution($this->image, '5x10');
      $this->assertEqual(count($errors), 1, t("Oversize images that can't be scaled get an error."), 'File');
    }

    // Clear out any resizing messages.
#    drupal_get_messages();
  }

  /**
   *  This will ensure the filename length is valid.
   */
  function testFileValidateNameLength() {
    // Create a new file object.
    $file = new stdClass();

    // Add a filename with an allowed length and test it.
    $file->filename = str_repeat('x', 255);
    $this->assertEqual(strlen($file->filename), 255);
    $errors = file_validate_name_length($file);
    $this->assertEqual(count($errors), 0, t('No errors reported for 255 length filename.'), 'File');

    // Add a filename with a length too long and test it.
    $file->filename = str_repeat('x', 256);
    $errors = file_validate_name_length($file);
    $this->assertEqual(count($errors), 1, t('An error reported for 256 length filename.'), 'File');

    // Add a filename with an empty string and test it.
    $file->filename = '';
    $errors = file_validate_name_length($file);
    $this->assertEqual(count($errors), 1, t('An error reported for 0 length filename.'), 'File');
  }


  /**
   * Test file_validate_size().
   */
  function testFileValidateSize() {
    global $user;
    $original_user = $user;
    session_save_session(FALSE);

    // Run these test as uid = 1
    $user = user_load(array('uid' => 1));

    $file = new stdClass();
    $file->filesize = 999999;
    $errors = file_validate_size($file, 1, 1);
    $this->assertEqual(count($errors), 0, t("No size limits enforced on uid=1."), 'File');


    // Run these test as a regular user
    $user = $this->drupalCreateUser();

    $file = new stdClass();
    $file->filesize = 1000;
    $errors = file_validate_size($file, 0, 0);
    $this->assertEqual(count($errors), 0, t("No limits means no errors."), 'File');
    $errors = file_validate_size($file, 1, 0);
    $this->assertEqual(count($errors), 1, t("Error for the file being over the limit."), 'File');
    $errors = file_validate_size($file, 0, 1);
    $this->assertEqual(count($errors), 1, t("Error for the user being over their limit."), 'File');
    $errors = file_validate_size($file, 1, 1);
    $this->assertEqual(count($errors), 2, t("Errors for both the file and their limit."), 'File');


    $user = $original_user;
    session_save_session(TRUE);
  }
}


/**
 *  This will run tests against file validation.
 *
 */
class FileLoadSaveTest extends DrupalWebTestCase {
  /**
   * Implementation of getInfo().
   */
  function getInfo() {
    return array(
      'name' => t('File loading and saving'),
      'description' => t('Tests the file save process, by creating a new text file, and moving and copying an image file.'),
      'group' => t('File'),
    );
  }

  /**
   *  This will test saving file data to the database.
   */
  function testFileLoadSave() {
    // Create a new file object.
    $file = array(
      'uid' => 1,
      'filename' => 'druplicon.png',
      'filepath' => 'misc/druplicon.png',
      'filemime' => 'image/png',
      'timestamp' => 1,
      'status' => FILE_STATUS_PERMANENT,
    );
    $this->file = (object) $file;

    // Try to load bogus stuff
    $this->assertFalse(file_load(-1), t("Try to load an invalid fid"));
    $this->assertFalse(file_load($this->file->filepath), t("Try to load a file that doesn't exist"));

    // Save it, inserting a new record
    $saved_file = file_save($this->file);
    $this->assertNotNull($saved_file, t("Saving the file should give us back a file object."), 'File');
    $this->assertTrue($saved_file->fid > 0, t("A new file ID is set when saving a new file to the database."), 'File');
    $this->assertEqual(db_result(db_query('SELECT COUNT(*) FROM {files} f WHERE f.fid = %d', $saved_file->fid)), 1, t("Record exists in the database."));
    $this->assertEqual($saved_file->filesize, filesize($this->file->filepath), t("File size was set correctly."), 'File');
    $this->assertTrue($saved_file->timestamp > 1, t("File size was set correctly."), 'File');

    // Load by path
    $by_path_file = file_load($this->file->filepath);
    $this->assertEqual($by_path_file->fid, $this->file->fid, t("Loading by filepath got the correct fid."), 'File');

    // Load by fid.
    $by_fid_file = file_load($this->file->fid);
    $this->assertEqual($by_fid_file->filepath, $this->file->filepath, t("Loading by fid got the correct filepath."), 'File');

    // Load again by fid to make sure the caching doesn't screw anythign up
    $by_fid_file = file_load($this->file->fid);
    $this->assertEqual($by_fid_file->filepath, $this->file->filepath, t("Loading by fid got the correct filepath."), 'File');

    // Resave the file, updating the existing record.
    $resaved_file = file_save($saved_file);
    $this->assertEqual($resaved_file->fid, $saved_file->fid, t("The file ID of an existing file is not changed when updating the database."), 'File');
    $this->assertTrue($resaved_file->timestamp >= $saved_file->timestamp, t("Timestamp didn't go backwards."), 'File');
    $count = db_result(db_query('SELECT COUNT(*) FROM {files} f WHERE f.fid = %d', $saved_file->fid));
    $this->assertEqual($count, 1, t("Record stils exists in the database."), 'File');

    // TODO: test the reset parameter
  }

  function testFileSaveDataPlain() {
    $contents = $this->randomName(8);

    // No filename
    $filepath = file_save_data_plain($contents);
    $this->assertTrue($filepath, t("Unnamed file saved correctly"));
    $this->assertEqual(file_directory_path(), dirname($filepath), t("File was placed in Drupal's files directory"));
    $this->assertEqual($contents, file_get_contents(realpath($filepath)), t("Contents of the file are correct."));

    // Provide a filename
    $filepath = file_save_data_plain($contents, 'asdf.txt', FILE_EXISTS_REPLACE);
    $this->assertTrue($filepath, t("Unnamed file saved correctly"));
    $this->assertEqual(file_directory_path(), dirname($filepath), t("File was placed in Drupal's files directory."));
    $this->assertEqual('asdf.txt', basename($filepath), t("File was named correctly."));
    $this->assertEqual($contents, file_get_contents(realpath($filepath)), t("Contents of the file are correct."));
  }

  function testFileSaveData() {
    $contents = $this->randomName(8);

    // No filename
    $file = file_save_data($contents);
    $this->assertTrue($file, t("Unnamed file saved correctly"));
    $this->assertEqual(file_directory_path(), dirname($file->filepath), t("File was placed in Drupal's files directory"));
    $this->assertEqual($contents, file_get_contents(realpath($file->filepath)), t("Contents of the file are correct."));
    $this->assertEqual($file->filemime, 'text/plain', t("A MIME type was set."));
    $this->assertEqual($file->status, FILE_STATUS_PERMANENT, t("The file's status was set to permanent."));

    // Try loading the file.
    $loaded_file = file_load($file->fid);
    $this->assertTrue($loaded_file, t("File loaded from database."));

    // Provide a filename
    $file = file_save_data($contents, 'asdf.txt', FILE_EXISTS_REPLACE);
    $this->assertTrue($file, t("Unnamed file saved correctly"));
    $this->assertEqual(file_directory_path(), dirname($file->filepath), t("File was placed in Drupal's files directory."));
    $this->assertEqual('asdf.txt', basename($file->filepath), t("File was named correctly."));
    $this->assertEqual($contents, file_get_contents(realpath($file->filepath)), t("Contents of the file are correct."));

    // Check the overwrite error.
    $file = file_save_data($contents, 'asdf.txt', FILE_EXISTS_ERROR);
    $this->assertFalse($file, t("Overwriting a file fails when FILE_EXISTS_ERROR is specified."));

    // Clear out the error messages.
#    drupal_get_messages();
  }
}

/**
 * Directory related tests.
 */
class FileDirectoryTest extends DrupalWebTestCase {
  /**
   * Implementation of getInfo().
   */
  function getInfo() {
    return array(
      'name' => t('File paths and directories'),
      'description' => t('Tests operations dealing with directories.'),
      'group' => t('File'),
    );
  }

  /**
   * Implementation of setUp().
   */
  function setUp() {
    // A directory to operate on.
    $this->directory = file_directory_path() . '/' . $this->randomName();
    // Save initial temp directory as this gets modified.
    $this->initial_temp_directory = variable_get('file_directory_temp', NULL);

    parent::setUp();
  }

  /**
   * Implementation of tearDown().
   */
  function tearDown() {
    @rmdir($this->directory);
    variable_set('file_directory_temp', $this->initial_temp_directory);

    // clear out form error messages generated
#    drupal_get_messages();

    parent::tearDown();
  }

  /**
   * Check directory creation and validation
   */
  function testFileCheckDirectory() {
    // non-existent directory
    $form_element = $this->randomName();
    $this->assertFalse(file_check_directory($this->directory, 0, $form_element), t("Error reported for non-existing directory."), 'File');

    // check that an error was set for the form element above
    $errors = form_get_errors();
    $this->assertEqual($errors[$form_element], t('The directory %directory does not exist.', array('%directory' => $this->directory)), t("Properly generated an error for the passed form element."), 'File');

    // make a directory
    $this->assertTrue(file_check_directory($this->directory, FILE_CREATE_DIRECTORY), t("No error reported when creating a new directory"), 'File');

    // make sure directory actually exists
    $this->assertTrue(is_dir($this->directory), t("Directory actually exists"), 'File');

    // make directory read only
    @chmod($this->directory, 0444);
    $form_element = $this->randomName();
    $this->assertFalse(file_check_directory($this->directory, 0, $form_element), t("Error reported for a non-writeable directory"), 'File');

    // check if form error was set
    $errors = form_get_errors();
    $this->assertEqual($errors[$form_element], t('The directory %directory is not writable', array('%directory' => $this->directory)), t("Properly generated an error for the passed form element."), 'File');

    // test directory permission modification
    $this->assertTrue(file_check_directory($this->directory, FILE_MODIFY_PERMISSIONS), t("No error reported when making directory writeable."), 'File');

    // verify directory actually is writeable
    $this->assertTrue(is_writeable($this->directory), t("Directory is writeable"), 'File');

    // remove .htaccess file to then test the writing of .htaccess file
    @unlink(file_directory_path() .'/.htaccess');
    file_check_directory(file_directory_path());
    $this->assertTrue(is_file(file_directory_path() . '/.htaccess'), t('Successfully created the .htaccess file in the files directory.'), 'File');

    // verify contents of .htaccess file
    $file = file_get_contents(file_directory_path() .'/.htaccess');
    $this->assertEqual($file, "SetHandler Drupal_Security_Do_Not_Remove_See_SA_2006_006\nOptions None\nOptions +FollowSymLinks", t('The .htaccess file contains the proper content.'), 'File');
  }

  /**
   * Check file_directory_path() and file_directory_temp().
   */
  function testFileDirectoryPath() {
    // directory path
    $path = variable_get('file_directory_path', conf_path() . '/files');
    $this->assertEqual($path, file_directory_path(), t("Properly returns the stored file directory path."), 'File');
  }

  /**
   * Check file_directory_path() and file_directory_temp().
   */
  function testFileDirectoryTemp() {
    // temp directory handling
    variable_set('file_directory_temp', NULL);
    $temp = file_directory_temp();
    $this->assertTrue(!is_null($temp), t("Properly set and retrieved temp directory %directory", array('%directory' => $temp)), 'File');
  }

  /**
   *  This tests that a file is actually in the specified directory, to prevent exploits.
   */
  function testFileCheckLocation() {
    $source = 'misc/xyz.txt';
    $directory = 'misc';
    $result = file_check_location($source, $directory);
    $this->assertNotEqual($result, FALSE, t("Non-existent file validates when checked for location in existing directory."), 'File');

    $source = 'fake/xyz.txt';
    $directory = 'fake';
    $result = file_check_location($source, $directory);
    $this->assertNotEqual($result, FALSE, t("Non-existent file validates when checked for location in non-existing directory."), 'File');

    $source = 'misc/fake/xyz.txt';
    $directory = 'misc';
    $result = file_check_location($source, $directory);
    $this->assertNotEqual($result, FALSE, t("Non-existent file validates when checked for location in directory, but name contains a non-existent subfolder."), 'File');

    $source = 'misc/../install.php';
    $directory = 'misc';
    $result = file_check_location($source, $directory);
    $this->assertEqual($result, FALSE, t("Existing file fails validation when it exists outside the directory path, using a /../ exploit."), 'File');

    $source = 'misc/druplicon.png';
    $directory = 'misc';
    $result = file_check_location($source, $directory);
    $this->assertNotEqual($result, FALSE, t("Existing file passes validation when checked for location in directory path, and filepath contains a subfolder of the checked path."), 'File');

    $result = file_check_location($source, $directory);
    $this->assertNotEqual($result, FALSE, t("Existing file passes validation, returning the source when checked for location in directory."), 'File');
  }
  
  
  /**
   * This will take a directory and path, and find a valid filepath that is not taken by another file.
   * First we test against an imaginary file that does not exist in a directory.
   * Then we test against a file that already exists within that directory.
   * @TODO: Finally we copy a file into a directory several times, to ensure a properly iterating filename suffix.
   */
  function testFileCreateNewFilepath() {
    $basename = 'xyz.txt';
    $directory = 'misc';
    $original = $directory .'/'. $basename;
    $path = file_create_filename($basename, $directory);
    $this->assertEqual($path, $original, t("New filepath %new equals %original.", array('%new' => $path, '%original' => $original)), 'File');

    $basename = 'druplicon.png';
    $original = $directory .'/'. $basename;
    $expected = $directory .'/druplicon_0.png';
    $path = file_create_filename($basename, $directory);
    $this->assertEqual($path, $expected, t("Creating a new filepath from %original equals %new.", array('%new' => $path, '%original' => $original)), 'File');
  }

  /**
   * This will test the filepath for a destination based on passed flags and
   * whether or not the file exists. 
   * If a file exists, file_destination($destination, $replace) will either return the existing filepath,
   *  if $replace is FILE_EXISTS_REPLACE, a new filepath if FILE_EXISTS_RENAME, or an error (returning FALSE)
   *  if FILE_EXISTS_ERROR. 
   * If the file doesn't currently exist, then it will simply return the filepath.
   */
  function testFileDestination() {
    // First test for non-existent file.
    $destination = 'misc/xyz.txt';
    $path = file_destination($destination, FILE_EXISTS_REPLACE);
    $this->assertEqual($path, $destination, t("Non-existing filepath destination is correct with FILE_EXISTS_REPLACE."), 'File');
    $path = file_destination($destination, FILE_EXISTS_RENAME);
    $this->assertEqual($path, $destination, t("Non-existing filepath destination is correct with FILE_EXISTS_RENAME."), 'File');
    $path = file_destination($destination, FILE_EXISTS_ERROR);
    $this->assertEqual($path, $destination, t("Non-existing filepath destination is correct with FILE_EXISTS_ERROR."), 'File');

    $destination = 'misc/druplicon.png';
    $path = file_destination($destination, FILE_EXISTS_REPLACE);
    $this->assertEqual($path, $destination, t("Existing filepath destination remains the same with FILE_EXISTS_REPLACE."), 'File');
    $path = file_destination($destination, FILE_EXISTS_RENAME);
    $this->assertNotEqual($path, $destination, t("A new filepath destination is created when filepath destination already exists with FILE_EXISTS_RENAME."), 'File');
    $path = file_destination($destination, FILE_EXISTS_ERROR);
    $this->assertEqual($path, FALSE, t("An error is returned when filepath destination already exists with FILE_EXISTS_ERROR."), 'File');
  }
}


/**
 * Deletion related tests
 */
class FileCopyDeleteMoveTest extends DrupalWebTestCase {
  /**
   * Implementation of getInfo().
   */
  function getInfo() {
    return array(
      'name' => t('File management'),
      'description' => t('Tests the file copy, delete and move functions.'),
      'group' => t('File'),
    );
  }

  /**
   * Implementation of setUp().
   */
  function setUp() {
    // A directory to operate on.
    $this->dirname = file_directory_path() . '/' . $this->randomName();
    mkdir($this->dirname);

    $this->file = new stdClass();
    $this->file->filepath = file_directory_path() . '/' . $this->randomName();
    $this->file->filename = basename($this->file->filepath);
    touch($this->file->filepath);
    file_save($this->file);

    parent::setUp();
  }

  /**
   * Implementation of tearDown().
   */
  function tearDown() {
    @rmdir($this->dirname);
    @unlink($this->file->filepath);
    if (!empty($this->file->fid)) {
      db_query('DELETE FROM {files} WHERE fid = %d', $this->file->fid);
    }

    parent::tearDown();
  }

  function testFileCopyPlain() {
    // Error for non-existant file
    $this->assertFalse(file_copy_plain($this->randomName()), t("Couldn't copy a non-existant file."));

    // Error for invalid destination (hopefully '/' won't be writeable)
#    $this->assertFalse(file_copy_plain($this->file->filepath, "/"), t("Couldn't copy to an invalid destination."));

    // TODO: test copying to a directory (rather than full directory/file path)

#    drupal_get_messages();
  }

  function testFileDeletePlain() {
    // Try to delete a non-existing file
    $this->assertTrue(file_delete_plain(file_directory_path() . '/' . $this->randomName()), t("Returns true when deleting a non-existant file."));

    // Try to delete a directory
    $this->assertTrue(is_dir($this->dirname), t("Directory exists."));
    $this->assertFalse(file_delete_plain($this->dirname), t("Could not delete the delete directory."));
    $this->assertTrue(file_exists($this->dirname), t("Directory has not been deleted."));

    // Delete a regular file
    $this->assertTrue(is_file($this->file->filepath), t("File exists."));
    $this->assertTrue(file_delete_plain($this->file->filepath), t("Deleted worked."));
    $this->assertFalse(file_exists($this->file->filepath), t("Test file has actually been deleted."));
  }

  function testFileDelete() {
    // Check that deletion removes the file and database record.
    $this->assertTrue(is_file($this->file->filepath), t("File exists."));
    $this->assertTrue(file_delete($this->file), t("Delete worked."));
    $this->assertFalse(file_exists($this->file->filepath), t("Test file has actually been deleted."));
    $this->assertFalse(file_load($this->file->filepath), t("File was removed from the database"));

    // TODO: figure out how to implement hook_file_references() so we can
    // report a file in use and test the $force parameter.
  }

  function testFileMovePlain() {
    // Move non-existant file
    $new_filepath = file_move_plain($this->randomName(), $this->randomName());
    $this->assertFalse($new_filepath, t("Moving a missing file fails"));

    // Move the file onto itself
    $new_filepath = file_move_plain($this->file->filepath, $this->file->filepath, FILE_EXISTS_ERROR);
    $this->assertFalse($new_filepath, t("Moving onto itself reports an error."));

    // Moving to a new name.
    $desired_filepath = file_directory_path() . '/' . $this->randomName();
    $new_filepath = file_move_plain($this->file->filepath, $desired_filepath, FILE_EXISTS_ERROR);
    $this->assertTrue($new_filepath, t("Move didn't report an error."));
    $this->assertEqual($new_filepath, $desired_filepath, t("Returned expected filepath."));
    $this->assertTrue(file_exists($new_filepath), t("File exists at the new location."));
    $this->assertFalse(file_exists($this->file->filepath), t("No file remains at the old location."));

    // Moving with rename.
    $desired_filepath = file_directory_path() . '/' . $this->randomName();
    touch($desired_filepath);
    $newer_filepath = file_move_plain($new_filepath, $desired_filepath, FILE_EXISTS_RENAME);
    $this->assertTrue($newer_filepath, t("Move didn't report an error."));
    $this->assertNotEqual($newer_filepath, $desired_filepath, t("Returned expected filepath."));
    $this->assertTrue(file_exists($newer_filepath), t("File exists at the new location."));
    $this->assertFalse(file_exists($new_filepath), t("No file remains at the old location."));

    // TODO: test moving to a directory (rather than full directory/file path)
  }

  function testFileMove() {
    $desired_filepath = file_directory_path() . '/' . $this->randomName();

    $file = file_move($this->file, $desired_filepath, FILE_EXISTS_ERROR);
    $this->assertTrue($file, t("File moved sucessfully."));
    $this->assertEqual($file->fid, $this->file->fid, t("File id is unchanged after move."));
    $loaded_file = file_load($file->fid);
dvm($file);
dvm($loaded_file);
    $this->assertTrue($loaded_file, t("File can be loaded from the database."));
    $this->assertEqual($file->filename, $loaded_file->filename, t("File name was updated correctly in the database."));
    $this->assertEqual($file->filepath, $loaded_file->filepath, t("File path was updated correctly in the database."));
    // Clean up the file so that the directory can be removed
    @unlink($loaded_file->filepath);

    // TODO: figure out how to implement a hook so we can test that hook_move()
    // is actually being called.
  }
}