<?php

/**
 * @file
 * Tests for file.module.
 */

/**
 * This class provides methods specifically for testing File's field handling.
 */
class FileFieldTestCase extends DrupalWebTestCase {
  protected $admin_user;

  function setUp() {
    parent::setUp('file', 'file_module_test');
    $this->admin_user = $this->drupalCreateUser(array('access content', 'access administration pages', 'administer site configuration', 'administer users', 'administer permissions', 'administer content types', 'administer nodes', 'bypass node access'));
    $this->drupalLogin($this->admin_user);
  }

  /**
   * Get 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 the fid of the last inserted file.
   */
  function getLastFileId() {
    return (int) db_query('SELECT MAX(fid) FROM {file_managed}')->fetchField();
  }

  /**
   * Create a new file field.
   *
   * @param $name
   *   The name of the new field (all lowercase), exclude the "field_" prefix.
   * @param $type_name
   *   The node type that this field will be added to.
   * @param $field_settings
   *   A list of field settings that will be added to the defaults.
   * @param $instance_settings
   *   A list of instance settings that will be added to the instance defaults.
   * @param $widget_settings
   *   A list of widget settings that will be added to the widget defaults.
   */
  function createFileField($name, $type_name, $field_settings = array(), $instance_settings = array(), $widget_settings = array()) {
    $field = array(
      'field_name' => $name,
      'type' => 'file',
      'settings' => array(),
      'cardinality' => !empty($field_settings['cardinality']) ? $field_settings['cardinality'] : 1,
    );
    $field['settings'] = array_merge($field['settings'], $field_settings);
    field_create_field($field);

    $this->attachFileField($name, 'node', $type_name, $instance_settings, $widget_settings);
  }

  /**
   * Attach a file field to an entity.
   *
   * @param $name
   *   The name of the new field (all lowercase), exclude the "field_" prefix.
   * @param $entity_type
   *   The entity type this field will be added to.
   * @param $bundle
   *   The bundle this field will be added to.
   * @param $field_settings
   *   A list of field settings that will be added to the defaults.
   * @param $instance_settings
   *   A list of instance settings that will be added to the instance defaults.
   * @param $widget_settings
   *   A list of widget settings that will be added to the widget defaults.
   */
  function attachFileField($name, $entity_type, $bundle, $instance_settings = array(), $widget_settings = array()) {
    $instance = array(
      'field_name' => $name,
      'label' => $name,
      'entity_type' => $entity_type,
      'bundle' => $bundle,
      'required' => !empty($instance_settings['required']),
      'settings' => array(),
      'widget' => array(
        'type' => 'file_generic',
        'settings' => array(),
      ),
    );
    $instance['settings'] = array_merge($instance['settings'], $instance_settings);
    $instance['widget']['settings'] = array_merge($instance['widget']['settings'], $widget_settings);
    field_create_instance($instance);
  }

  /**
   * Update an existing file field with new settings.
   */
  function updateFileField($name, $type_name, $instance_settings = array(), $widget_settings = array()) {
    $instance = field_info_instance('node', $name, $type_name);
    $instance['settings'] = array_merge($instance['settings'], $instance_settings);
    $instance['widget']['settings'] = array_merge($instance['widget']['settings'], $widget_settings);

    field_update_instance($instance);
  }

  /**
   * Upload a file to a node.
   */
  function uploadNodeFile($file, $field_name, $nid_or_type, $new_revision = TRUE) {
    $langcode = LANGUAGE_NONE;
    $edit = array(
      "title" => $this->randomName(),
      'revision' => (string) (int) $new_revision,
    );

    if (is_numeric($nid_or_type)) {
      $nid = $nid_or_type;
    }
    else {
      // Add a new node.
      $node = $this->drupalCreateNode(array('type' => $nid_or_type));
      $nid = $node->nid;
      // Save at least one revision to better simulate a real site.
      $this->drupalCreateNode(get_object_vars($node));
      $node = node_load($nid, NULL, TRUE);
      $this->assertNotEqual($nid, $node->vid, t('Node revision exists.'));
    }

    // Attach a file to the node.
    $edit['files[' . $field_name . '_' . $langcode . '_0]'] = drupal_realpath($file->uri);
    $this->drupalPost("node/$nid/edit", $edit, t('Save'));

    return $nid;
  }

  /**
   * Remove a file from a node.
   *
   * Note that if replacing a file, it must first be removed then added again.
   */
  function removeNodeFile($nid, $new_revision = TRUE) {
    $edit = array(
      'revision' => (string) (int) $new_revision,
    );

    $this->drupalPost('node/' . $nid . '/edit', array(), t('Remove'));
    $this->drupalPost(NULL, $edit, t('Save'));
  }

  /**
   * Replace a file within a node.
   */
  function replaceNodeFile($file, $field_name, $nid, $new_revision = TRUE) {
    $edit = array(
      'files[' . $field_name . '_' . LANGUAGE_NONE . '_0]' => drupal_realpath($file->uri),
      'revision' => (string) (int) $new_revision,
    );

    $this->drupalPost('node/' . $nid . '/edit', array(), t('Remove'));
    $this->drupalPost(NULL, $edit, t('Save'));
  }

  /**
   * Assert that a file exists physically on disk.
   */
  function assertFileExists($file, $message = NULL) {
    $message = isset($message) ? $message : t('File %file exists on the disk.', array('%file' => $file->uri));
    $this->assertTrue(is_file($file->uri), $message);
  }

  /**
   * Assert that a file exists in the database.
   */
  function assertFileEntryExists($file, $message = NULL) {
    entity_get_controller('file')->resetCache();
    $db_file = file_load($file->fid);
    $message = isset($message) ? $message : t('File %file exists in database at the correct path.', array('%file' => $file->uri));
    $this->assertEqual($db_file->uri, $file->uri, $message);
  }

  /**
   * Assert that a file does not exist on disk.
   */
  function assertFileNotExists($file, $message = NULL) {
    $message = isset($message) ? $message : t('File %file exists on the disk.', array('%file' => $file->uri));
    $this->assertFalse(is_file($file->uri), $message);
  }

  /**
   * Assert that a file does not exist in the database.
   */
  function assertFileEntryNotExists($file, $message) {
    entity_get_controller('file')->resetCache();
    $message = isset($message) ? $message : t('File %file exists in database at the correct path.', array('%file' => $file->uri));
    $this->assertFalse(file_load($file->fid), $message);
  }

  /**
   * Assert that a file's status is set to permanent in the database.
   */
  function assertFileIsPermanent($file, $message = NULL) {
    $message = isset($message) ? $message : t('File %file is permanent.', array('%file' => $file->uri));
    $this->assertTrue($file->status == FILE_STATUS_PERMANENT, $message);
  }
}

/**
 * Test class for testing the 'managed_file' element type on its own, not as part of a file field.
 *
 * @todo Create a FileTestCase base class and move FileFieldTestCase methods
 *   that aren't related to fields into it.
 */
class FileManagedFileElementTestCase extends FileFieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'Managed file element test',
      'description' => 'Tests the managed_file element type.',
      'group' => 'File',
    );
  }

  /**
   * Tests the managed_file element type.
   */
  function testManagedFile() {
    // Perform the tests with all permutations of $form['#tree'] and
    // $element['#extended'].
    foreach (array(0, 1) as $tree) {
      foreach (array(0, 1) as $extended) {
        $test_file = $this->getTestFile('text');
        $path = 'file/test/' . $tree . '/' . $extended;
        $input_base_name = $tree ? 'nested_file' : 'file';

        // Submit without a file.
        $this->drupalPost($path, array(), t('Save'));
        $this->assertRaw(t('The file id is %fid.', array('%fid' => 0)), t('Submitted without a file.'));

        // Submit a new file, without using the Upload button.
        $last_fid_prior = $this->getLastFileId();
        $edit = array('files[' . $input_base_name . ']' => drupal_realpath($test_file->uri));
        $this->drupalPost($path, $edit, t('Save'));
        $last_fid = $this->getLastFileId();
        $this->assertTrue($last_fid > $last_fid_prior, t('New file got saved.'));
        $this->assertRaw(t('The file id is %fid.', array('%fid' => $last_fid)), t('Submit handler has correct file info.'));

        // Submit no new input, but with a default file.
        $this->drupalPost($path . '/' . $last_fid, array(), t('Save'));
        $this->assertRaw(t('The file id is %fid.', array('%fid' => $last_fid)), t('Empty submission did not change an existing file.'));

        // Now, test the Upload and Remove buttons, with and without Ajax.
        foreach (array(FALSE, TRUE) as $ajax) {
          // Upload, then Submit.
          $last_fid_prior = $this->getLastFileId();
          $this->drupalGet($path);
          $edit = array('files[' . $input_base_name . ']' => drupal_realpath($test_file->uri));
          if ($ajax) {
            $this->drupalPostAJAX(NULL, $edit, $input_base_name . '_upload_button');
          }
          else {
            $this->drupalPost(NULL, $edit, t('Upload'));
          }
          $last_fid = $this->getLastFileId();
          $this->assertTrue($last_fid > $last_fid_prior, t('New file got uploaded.'));
          $this->drupalPost(NULL, array(), t('Save'));
          $this->assertRaw(t('The file id is %fid.', array('%fid' => $last_fid)), t('Submit handler has correct file info.'));

          // Remove, then Submit.
          $this->drupalGet($path . '/' . $last_fid);
          if ($ajax) {
            $this->drupalPostAJAX(NULL, array(), $input_base_name . '_remove_button');
          }
          else {
            $this->drupalPost(NULL, array(), t('Remove'));
          }
          $this->drupalPost(NULL, array(), t('Save'));
          $this->assertRaw(t('The file id is %fid.', array('%fid' => 0)), t('Submission after file removal was successful.'));

          // Upload, then Remove, then Submit.
          $this->drupalGet($path);
          $edit = array('files[' . $input_base_name . ']' => drupal_realpath($test_file->uri));
          if ($ajax) {
            $this->drupalPostAJAX(NULL, $edit, $input_base_name . '_upload_button');
            $this->drupalPostAJAX(NULL, array(), $input_base_name . '_remove_button');
          }
          else {
            $this->drupalPost(NULL, $edit, t('Upload'));
            $this->drupalPost(NULL, array(), t('Remove'));
          }
          $this->drupalPost(NULL, array(), t('Save'));
          $this->assertRaw(t('The file id is %fid.', array('%fid' => 0)), t('Submission after file upload and removal was successful.'));
        }
      }
    }
  }
}

/**
 * Test class to test file field widget, single and multi-valued, with and without Ajax, with public and private files.
 */
class FileFieldWidgetTestCase extends FileFieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'File field widget test',
      'description' => 'Tests the file field widget, single and multi-valued, with and without AJAX, with public and private files.',
      'group' => 'File',
    );
  }

  /**
   * Tests upload and remove buttons, with and without Ajax, for a single-valued File field.
   */
  function testSingleValuedWidget() {
    // Use 'page' instead of 'article', so that the 'article' image field does
    // not conflict with this test. If in the future the 'page' type gets its
    // own default file or image field, this test can be made more robust by
    // using a custom node type.
    $type_name = 'page';
    $field_name = strtolower($this->randomName());
    $this->createFileField($field_name, $type_name);
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

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

    foreach (array('nojs', 'js') as $type) {
      // Create a new node with the uploaded file and ensure it got uploaded
      // successfully.
      // @todo This only tests a 'nojs' submission, because drupalPostAJAX()
      //   does not yet support file uploads.
      $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
      $node = node_load($nid, NULL, TRUE);
      $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
      $this->assertFileExists($node_file, t('New file saved to disk on node creation.'));

      // Ensure the file can be downloaded.
      $this->drupalGet(file_create_url($node_file->uri));
      $this->assertResponse(200, t('Confirmed that the generated URL is correct by downloading the shipped file.'));

      // Ensure the edit page has a remove button instead of an upload button.
      $this->drupalGet("node/$nid/edit");
      $this->assertNoFieldByXPath('//input[@type="submit"]', t('Upload'), t('Node with file does not display the "Upload" button.'));
      $this->assertFieldByXpath('//input[@type="submit"]', t('Remove'), t('Node with file displays the "Remove" button.'));

      // "Click" the remove button (emulating either a nojs or js submission).
      switch ($type) {
        case 'nojs':
          $this->drupalPost(NULL, array(), t('Remove'));
          break;
        case 'js':
          $button = $this->xpath('//input[@type="submit" and @value="' . t('Remove') . '"]');
          $this->drupalPostAJAX(NULL, array(), array((string) $button[0]['name'] => (string) $button[0]['value']));
          break;
      }

      // Ensure the page now has an upload button instead of a remove button.
      $this->assertNoFieldByXPath('//input[@type="submit"]', t('Remove'), t('After clicking the "Remove" button, it is no longer displayed.'));
      $this->assertFieldByXpath('//input[@type="submit"]', t('Upload'), t('After clicking the "Remove" button, the "Upload" button is displayed.'));

      // Save the node and ensure it does not have the file.
      $this->drupalPost(NULL, array(), t('Save'));
      $node = node_load($nid, NULL, TRUE);
      $this->assertTrue(empty($node->{$field_name}[LANGUAGE_NONE][0]['fid']), t('File was successfully removed from the node.'));
    }
  }

  /**
   * Tests upload and remove buttons, with and without Ajax, for a multi-valued File field.
   */
  function testMultiValuedWidget() {
    // Use 'page' instead of 'article', so that the 'article' image field does
    // not conflict with this test. If in the future the 'page' type gets its
    // own default file or image field, this test can be made more robust by
    // using a custom node type.
    $type_name = 'page';
    $field_name = strtolower($this->randomName());
    $this->createFileField($field_name, $type_name, array('cardinality' => 3));
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

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

    foreach (array('nojs', 'js') as $type) {
      // Visit the node creation form, and upload 3 files. Since the field has
      // cardinality of 3, ensure the "Upload" button is displayed until after
      // the 3rd file, and after that, isn't displayed.
      // @todo This is only testing a non-Ajax upload, because drupalPostAJAX()
      //   does not yet emulate jQuery's file upload.
      $this->drupalGet("node/add/$type_name");
      for ($delta = 0; $delta < 3; $delta++) {
        $edit = array('files[' . $field_name . '_' . LANGUAGE_NONE . '_' . $delta . ']' => drupal_realpath($test_file->uri));
        // If the Upload button doesn't exist, drupalPost() will automatically
        // fail with an assertion message.
        $this->drupalPost(NULL, $edit, t('Upload'));
      }
      $this->assertNoFieldByXpath('//input[@type="submit"]', t('Upload'), t('After uploading 3 files, the "Upload" button is no longer displayed.'));

      // Test clicking each "Remove" button. For extra robustness, test them out
      // of sequential order. They are 0-indexed, and get renumbered after each
      // iteration, so array(1, 1, 0) means:
      // - First remove the 2nd file.
      // - Then remove what is then the 2nd file (was originally the 3rd file).
      // - Then remove the first file.
      $num_expected_remove_buttons = 3;
      foreach (array(1, 1, 0) as $delta) {
        // Ensure we have the expected number of Remove buttons, and that they
        // are numbered sequentially.
        $buttons = $this->xpath('//input[@type="submit" and @value="Remove"]');
        $this->assertTrue(is_array($buttons) && count($buttons) === $num_expected_remove_buttons, t('There are %n "Remove" buttons displayed (JSMode=%type).', array('%n' => $num_expected_remove_buttons, '%type' => $type)));
        foreach ($buttons as $i => $button) {
          $this->assertIdentical((string) $button['name'], $field_name . '_' . LANGUAGE_NONE . '_' . $i . '_remove_button');
        }

        // "Click" the remove button (emulating either a nojs or js submission).
        $button_name = $field_name . '_' . LANGUAGE_NONE . '_' . $delta . '_remove_button';
        switch ($type) {
          case 'nojs':
            // drupalPost() takes a $submit parameter that is the value of the
            // button whose click we want to emulate. Since we have multiple
            // buttons with the value "Remove", and want to control which one we
            // use, we change the value of the other ones to something else.
            // Since non-clicked buttons aren't included in the submitted POST
            // data, and since drupalPost() will result in $this being updated
            // with a newly rebuilt form, this doesn't cause problems.
            foreach ($buttons as $button) {
              if ($button['name'] != $button_name) {
                $button['value'] = 'DUMMY';
              }
            }
            $this->drupalPost(NULL, array(), t('Remove'));
            break;
          case 'js':
            // drupalPostAJAX() lets us target the button precisely, so we don't
            // require the workaround used above for nojs.
            $this->drupalPostAJAX(NULL, array(), array($button_name => t('Remove')));
            break;
        }
        $num_expected_remove_buttons--;

        // Ensure we have a single Upload button, and that it is numbered
        // sequentially after the Remove buttons.
        $buttons = $this->xpath('//input[@type="submit" and @value="Upload"]');
        $this->assertTrue(is_array($buttons) && count($buttons) == 1 && ((string) $buttons[0]['name'] === ($field_name . '_' . LANGUAGE_NONE . '_' . $num_expected_remove_buttons . '_upload_button')), t('After removing a file, an "Upload" button is displayed (JSMode=%type).'));
      }

      // Ensure the page now has no Remove buttons.
      $this->assertNoFieldByXPath('//input[@type="submit"]', t('Remove'), t('After removing all files, there is no "Remove" button displayed.', array('%n' => $num_expected_remove_buttons, '%type' => $type)));

      // Save the node and ensure it does not have any files.
      $this->drupalPost(NULL, array('title' => $this->randomName()), t('Save'));
      $matches = array();
      preg_match('/node\/([0-9]+)/', $this->getUrl(), $matches);
      $nid = $matches[1];
      $node = node_load($nid, NULL, TRUE);
      $this->assertTrue(empty($node->{$field_name}[LANGUAGE_NONE][0]['fid']), t('Node was successfully saved without any files.'));
    }
  }

  /**
   * Tests a file field with a "Private files" upload destination setting.
   */
  function testPrivateFileSetting() {
    // Use 'page' instead of 'article', so that the 'article' image field does
    // not conflict with this test. If in the future the 'page' type gets its
    // own default file or image field, this test can be made more robust by
    // using a custom node type.
    $type_name = 'page';
    $field_name = strtolower($this->randomName());
    $this->createFileField($field_name, $type_name);
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

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

    // Change the field setting to make its files private, and upload a file.
    $edit = array('field[settings][uri_scheme]' => 'private');
    $this->drupalPost("admin/structure/types/manage/$type_name/fields/$field_name", $edit, t('Save settings'));
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('New file saved to disk on node creation.'));

    // Ensure the private file is available to the user who uploaded it.
    $this->drupalGet(file_create_url($node_file->uri));
    $this->assertResponse(200, t('Confirmed that the generated URL is correct by downloading the shipped file.'));

    // Ensure we can't change 'uri_scheme' field settings while there are some
    // entities with uploaded files.
    $this->drupalGet("admin/structure/types/manage/$type_name/fields/$field_name");
    $this->assertFieldByXpath('//input[@id="edit-field-settings-uri-scheme-public" and @disabled="disabled"]', 'public', t('Upload destination setting disabled.'));

    // Delete node and confirm that setting could be changed.
    node_delete($nid);
    $this->drupalGet("admin/structure/types/manage/$type_name/fields/$field_name");
    $this->assertFieldByXpath('//input[@id="edit-field-settings-uri-scheme-public" and not(@disabled)]', 'public', t('Upload destination setting enabled.'));
  }

  /**
   * Tests that download restrictions on private files work on comments.
   */
  function testPrivateFileComment() {
    $user = $this->drupalCreateUser(array('access comments'));

    // Remove access comments permission from anon user.
    $edit = array(
      '1[access comments]' => FALSE,
    );
    $this->drupalPost('admin/people/permissions', $edit, t('Save permissions'));

    // Create a new field.
    $edit = array(
      'fields[_add_new_field][label]' => $label = $this->randomName(),
      'fields[_add_new_field][field_name]' => $name = strtolower($this->randomName()),
      'fields[_add_new_field][type]' => 'file',
      'fields[_add_new_field][widget_type]' => 'file_generic',
    );
    $this->drupalPost('admin/structure/types/manage/article/comment/fields', $edit, t('Save'));
    $edit = array('field[settings][uri_scheme]' => 'private');
    $this->drupalPost(NULL, $edit, t('Save field settings'));
    $this->drupalPost(NULL, array(), t('Save settings'));

    // Create node.
    $text_file = $this->getTestFile('text');
    $edit = array(
      'title' => $this->randomName(),
    );
    $this->drupalPost('node/add/article', $edit, t('Save'));

    // Add a comment with a file.
    $text_file = $this->getTestFile('text');
    $edit = array(
      'files[field_' . $name . '_' . LANGUAGE_NONE . '_' . 0 . ']' => drupal_realpath($text_file->uri),
      'comment_body[' . LANGUAGE_NONE . '][0][value]' => $comment_body = $this->randomName(),
    );
    $this->drupalPost(NULL, $edit, t('Save'));

    // Get the comment ID.
    preg_match('/comment-([0-9]+)/', $this->getUrl(), $matches);
    $cid = $matches[1];

    // Log in as normal user.
    $this->drupalLogin($user);

    $comment = comment_load($cid);
    $comment_file = (object) $comment->{'field_' . $name}[LANGUAGE_NONE][0];
    $this->assertFileExists($comment_file, t('New file saved to disk on node creation.'));
    // Test authenticated file download.
    $url = file_create_url($comment_file->uri);
    $this->assertNotEqual($url, NULL, t('Confirmed that the URL is valid'));
    $this->drupalGet(file_create_url($comment_file->uri));
    $this->assertResponse(200, t('Confirmed that the generated URL is correct by downloading the shipped file.'));

    // Test anonymous file download.
    $this->drupalLogout();
    $this->drupalGet(file_create_url($comment_file->uri));
    $this->assertResponse(403, t('Confirmed that access is denied for the file without the needed permission.'));
  }

}

/**
 * Test class to test file handling with node revisions.
 */
class FileFieldRevisionTestCase extends FileFieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'File field revision test',
      'description' => 'Test creating and deleting revisions with files attached.',
      'group' => 'File',
    );
  }

  /**
   * Test creating multiple revisions of a node and managing the attached files.
   *
   * Expected behaviors:
   *  - Adding a new revision will make another entry in the field table, but
   *    the original file will not be duplicated.
   *  - Deleting a revision should not delete the original file if the file
   *    is in use by another revision.
   *  - When the last revision that uses a file is deleted, the original file
   *    should be deleted also.
   */
  function testRevisions() {
    $type_name = 'article';
    $field_name = strtolower($this->randomName());
    $this->createFileField($field_name, $type_name);
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

    // Attach the same fields to users.
    $this->attachFileField($field_name, 'user', 'user');

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

    // Create a new node with the uploaded file.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Check that the file exists on disk and in the database.
    $node = node_load($nid, NULL, TRUE);
    $node_file_r1 = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $node_vid_r1 = $node->vid;
    $this->assertFileExists($node_file_r1, t('New file saved to disk on node creation.'));
    $this->assertFileEntryExists($node_file_r1, t('File entry exists in database on node creation.'));
    $this->assertFileIsPermanent($node_file_r1, t('File is permanent.'));

    // Upload another file to the same node in a new revision.
    $this->replaceNodeFile($test_file, $field_name, $nid);
    $node = node_load($nid, NULL, TRUE);
    $node_file_r2 = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $node_vid_r2 = $node->vid;
    $this->assertFileExists($node_file_r2, t('Replacement file exists on disk after creating new revision.'));
    $this->assertFileEntryExists($node_file_r2, t('Replacement file entry exists in database after creating new revision.'));
    $this->assertFileIsPermanent($node_file_r2, t('Replacement file is permanent.'));

    // Check that the original file is still in place on the first revision.
    $node = node_load($nid, $node_vid_r1, TRUE);
    $this->assertEqual($node_file_r1, (object) $node->{$field_name}[LANGUAGE_NONE][0], t('Original file still in place after replacing file in new revision.'));
    $this->assertFileExists($node_file_r1, t('Original file still in place after replacing file in new revision.'));
    $this->assertFileEntryExists($node_file_r1, t('Original file entry still in place after replacing file in new revision'));
    $this->assertFileIsPermanent($node_file_r1, t('Original file is still permanent.'));

    // Save a new version of the node without any changes.
    // Check that the file is still the same as the previous revision.
    $this->drupalPost('node/' . $nid . '/edit', array('revision' => '1'), t('Save'));
    $node = node_load($nid, NULL, TRUE);
    $node_file_r3 = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $node_vid_r3 = $node->vid;
    $this->assertEqual($node_file_r2, $node_file_r3, t('Previous revision file still in place after creating a new revision without a new file.'));
    $this->assertFileIsPermanent($node_file_r3, t('New revision file is permanent.'));

    // Revert to the first revision and check that the original file is active.
    $this->drupalPost('node/' . $nid . '/revisions/' . $node_vid_r1 . '/revert', array(), t('Revert'));
    $node = node_load($nid, NULL, TRUE);
    $node_file_r4 = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $node_vid_r4 = $node->vid;
    $this->assertEqual($node_file_r1, $node_file_r4, t('Original revision file still in place after reverting to the original revision.'));
    $this->assertFileIsPermanent($node_file_r4, t('Original revision file still permanent after reverting to the original revision.'));

    // Delete the second revision and check that the file is kept (since it is
    // still being used by the third revision).
    $this->drupalPost('node/' . $nid . '/revisions/' . $node_vid_r2 . '/delete', array(), t('Delete'));
    $this->assertFileExists($node_file_r3, t('Second file is still available after deleting second revision, since it is being used by the third revision.'));
    $this->assertFileEntryExists($node_file_r3, t('Second file entry is still available after deleting second revision, since it is being used by the third revision.'));
    $this->assertFileIsPermanent($node_file_r3, t('Second file entry is still permanent after deleting second revision, since it is being used by the third revision.'));

    // Attach the second file to a user.
    $user = $this->drupalCreateUser();
    $edit = (array) $user;
    $edit[$field_name][LANGUAGE_NONE][0] = (array) $node_file_r3;
    user_save($user, $edit);
    $this->drupalGet('user/' . $user->uid . '/edit');

    // Delete the third revision and check that the file is not deleted yet.
    $this->drupalPost('node/' . $nid . '/revisions/' . $node_vid_r3 . '/delete', array(), t('Delete'));
    $this->assertFileExists($node_file_r3, t('Second file is still available after deleting third revision, since it is being used by the user.'));
    $this->assertFileEntryExists($node_file_r3, t('Second file entry is still available after deleting third revision, since it is being used by the user.'));
    $this->assertFileIsPermanent($node_file_r3, t('Second file entry is still permanent after deleting third revision, since it is being used by the user.'));

    // Delete the user and check that the file is also deleted.
    user_delete($user->uid);
    // TODO: This seems like a bug in File API. Clearing the stat cache should
    // not be necessary here. The file really is deleted, but stream wrappers
    // doesn't seem to think so unless we clear the PHP file stat() cache.
    clearstatcache();
    $this->assertFileNotExists($node_file_r3, t('Second file is now deleted after deleting third revision, since it is no longer being used by any other nodes.'));
    $this->assertFileEntryNotExists($node_file_r3, t('Second file entry is now deleted after deleting third revision, since it is no longer being used by any other nodes.'));

    // Delete the entire node and check that the original file is deleted.
    $this->drupalPost('node/' . $nid . '/delete', array(), t('Delete'));
    $this->assertFileNotExists($node_file_r1, t('Original file is deleted after deleting the entire node with two revisions remaining.'));
    $this->assertFileEntryNotExists($node_file_r1, t('Original file entry is deleted after deleting the entire node with two revisions remaining.'));
  }
}

/**
 * Test class to check that formatters are working properly.
 */
class FileFieldDisplayTestCase extends FileFieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'File field display tests',
      'description' => 'Test the display of file fields in node and views.',
      'group' => 'File',
    );
  }

  /**
   * Test normal formatter display on node display.
   */
  function testNodeDisplay() {
    $field_name = strtolower($this->randomName());
    $type_name = 'article';
    $field_settings = array(
      'display_field' => '1',
      'display_default' => '1',
    );
    $instance_settings = array(
      'description_field' => '1',
    );
    $widget_settings = array();
    $this->createFileField($field_name, $type_name, $field_settings, $instance_settings, $widget_settings);
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

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

    // Create a new node with the uploaded file.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $this->drupalGet('node/' . $nid . '/edit');

    // Check that the default formatter is displaying with the file name.
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $default_output = theme('file_link', array('file' => $node_file));
    $this->assertRaw($default_output, t('Default formatter displaying correctly on full node view.'));

    // Turn the "display" option off and check that the file is no longer displayed.
    $edit = array($field_name . '[' . LANGUAGE_NONE . '][0][display]' => FALSE);
    $this->drupalPost('node/' . $nid . '/edit', $edit, t('Save'));

    $this->assertNoRaw($default_output, t('Field is hidden when "display" option is unchecked.'));

  }
}

/**
 * Test class to check for various validations.
 */
class FileFieldValidateTestCase extends FileFieldTestCase {
  protected $field;
  protected $node_type;

  public static function getInfo() {
    return array(
      'name' => 'File field validation tests',
      'description' => 'Tests validation functions such as file type, max file size, max size per node, and required.',
      'group' => 'File',
    );
  }

  /**
   * Test required property on file fields.
   */
  function testRequired() {
    $type_name = 'article';
    $field_name = strtolower($this->randomName());
    $this->createFileField($field_name, $type_name, array(), array('required' => '1'));
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

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

    // Try to post a new node without uploading a file.
    $langcode = LANGUAGE_NONE;
    $edit = array("title" => $this->randomName());
    $this->drupalPost('node/add/' . $type_name, $edit, t('Save'));
    $this->assertRaw(t('!title field is required.', array('!title' => $instance['label'])), t('Node save failed when required file field was empty.'));

    // Create a new node with the uploaded file.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $this->assertTrue($nid !== FALSE, t('uploadNodeFile(@test_file, @field_name, @type_name) succeeded', array('@test_file' => $test_file->uri, '@field_name' => $field_name, '@type_name' => $type_name)));

    $node = node_load($nid, NULL, TRUE);

    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading to the required field.'));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading to the required field.'));

    // Try again with a multiple value field.
    field_delete_field($field_name);
    $this->createFileField($field_name, $type_name, array('cardinality' => FIELD_CARDINALITY_UNLIMITED), array('required' => '1'));

    // Try to post a new node without uploading a file in the multivalue field.
    $edit = array('title' => $this->randomName());
    $this->drupalPost('node/add/' . $type_name, $edit, t('Save'));
    $this->assertRaw(t('!title field is required.', array('!title' => $instance['label'])), t('Node save failed when required multiple value file field was empty.'));

    // Create a new node with the uploaded file into the multivalue field.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading to the required multiple value field.'));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading to the required multipel value field.'));

    // Remove our file field.
    field_delete_field($field_name);
  }

  /**
   * Test the max file size validator.
   */
  function testFileMaxSize() {
    $type_name = 'article';
    $field_name = strtolower($this->randomName());
    $this->createFileField($field_name, $type_name, array(), array('required' => '1'));
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

    $small_file = $this->getTestFile('text', 131072); // 128KB.
    $large_file = $this->getTestFile('text', 1310720); // 1.2MB

    // Test uploading both a large and small file with different increments.
    $sizes = array(
      '1M' => 1048576,
      '1024K' => 1048576,
      '1048576' => 1048576,
    );

    foreach ($sizes as $max_filesize => $file_limit) {
      // Set the max file upload size.
      $this->updateFileField($field_name, $type_name, array('max_filesize' => $max_filesize));
      $instance = field_info_instance('node', $field_name, $type_name);

      // Create a new node with the small file, which should pass.
      $nid = $this->uploadNodeFile($small_file, $field_name, $type_name);
      $node = node_load($nid, NULL, TRUE);
      $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
      $this->assertFileExists($node_file, t('File exists after uploading a file (%filesize) under the max limit (%maxsize).', array('%filesize' => format_size($small_file->filesize), '%maxsize' => $max_filesize)));
      $this->assertFileEntryExists($node_file, t('File entry exists after uploading a file (%filesize) under the max limit (%maxsize).', array('%filesize' => format_size($small_file->filesize), '%maxsize' => $max_filesize)));

      // Check that uploading the large file fails (1M limit).
      $nid = $this->uploadNodeFile($large_file, $field_name, $type_name);
      $error_message = t('The file is %filesize exceeding the maximum file size of %maxsize.', array('%filesize' => format_size($large_file->filesize), '%maxsize' => format_size($file_limit)));
      $this->assertRaw($error_message, t('Node save failed when file (%filesize) exceeded the max upload size (%maxsize).', array('%filesize' => format_size($large_file->filesize), '%maxsize' => $max_filesize)));
    }

    // Turn off the max filesize.
    $this->updateFileField($field_name, $type_name, array('max_filesize' => ''));

    // Upload the big file successfully.
    $nid = $this->uploadNodeFile($large_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading a file (%filesize) with no max limit.', array('%filesize' => format_size($large_file->filesize))));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading a file (%filesize) with no max limit.', array('%filesize' => format_size($large_file->filesize))));

    // Remove our file field.
    field_delete_field($field_name);
  }

  /**
   * Test the file extension, do additional checks if mimedetect is installed.
   */
  function testFileExtension() {
    $type_name = 'article';
    $field_name = strtolower($this->randomName());
    $this->createFileField($field_name, $type_name);
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

    $test_file = $this->getTestFile('image');
    list(, $test_file_extension) = explode('.', $test_file->filename);

    // Disable extension checking.
    $this->updateFileField($field_name, $type_name, array('file_extensions' => ''));

    // Check that the file can be uploaded with no extension checking.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading a file with no extension checking.'));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading a file with no extension checking.'));

    // Enable extension checking for text files.
    $this->updateFileField($field_name, $type_name, array('file_extensions' => 'txt'));

    // Check that the file with the wrong extension cannot be uploaded.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $error_message = t('Only files with the following extensions are allowed: %files-allowed.', array('%files-allowed' => 'txt'));
    $this->assertRaw($error_message, t('Node save failed when file uploaded with the wrong extension.'));

    // Enable extension checking for text and image files.
    $this->updateFileField($field_name, $type_name, array('file_extensions' => "txt $test_file_extension"));

    // Check that the file can be uploaded with extension checking.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $this->assertFileExists($node_file, t('File exists after uploading a file with extension checking.'));
    $this->assertFileEntryExists($node_file, t('File entry exists after uploading a file with extension checking.'));

    // Remove our file field.
    field_delete_field($field_name);
  }
}

/**
 * Test class to check that files are uploaded to proper locations.
 */
class FileFieldPathTestCase extends FileFieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'File field file path tests',
      'description' => 'Test that files are uploaded to the proper location with token support.',
      'group' => 'File',
    );
  }

  /**
   * Test normal formatter display on node display.
   */
  function testUploadPath() {
    $field_name = strtolower($this->randomName());
    $type_name = 'article';
    $field = $this->createFileField($field_name, $type_name);
    $test_file = $this->getTestFile('text');

    // Create a new node.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Check that the file was uploaded to the file root.
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $this->assertPathMatch('public://' . $test_file->filename, $node_file->uri, t('The file %file was uploaded to the correct path.', array('%file' => $node_file->uri)));

    // Change the path to contain multiple subdirectories.
    $field = $this->updateFileField($field_name, $type_name, array('file_directory' => 'foo/bar/baz'));

    // Upload a new file into the subdirectories.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Check that the file was uploaded into the subdirectory.
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $this->assertPathMatch('public://foo/bar/baz/' . $test_file->filename, $node_file->uri, t('The file %file was uploaded to the correct path.', array('%file' => $node_file->uri)));

    // Check the path when used with tokens.
    // Change the path to contain multiple token directories.
    $field = $this->updateFileField($field_name, $type_name, array('file_directory' => '[user:uid]/[user:name]'));

    // Upload a new file into the token subdirectories.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Check that the file was uploaded into the subdirectory.
    $node = node_load($nid, NULL, TRUE);
    $node_file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $data = array('user' => $this->admin_user);
    $subdirectory = token_replace('[user:uid]/[user:name]', $data);
    $this->assertPathMatch('public://' . $subdirectory . '/' . $test_file->filename, $node_file->uri, t('The file %file was uploaded to the correct path with token replacements.', array('%file' => $node_file->uri)));
  }

  /**
   * A loose assertion to check that a file is uploaded to the right location.
   *
   * @param $expected_path
   *   The location where the file is expected to be uploaded. Duplicate file
   *   names to not need to be taken into account.
   * @param $actual_path
   *   Where the file was actually uploaded.
   * @param $message
   *   The message to display with this assertion.
   */
  function assertPathMatch($expected_path, $actual_path, $message) {
    // Strip off the extension of the expected path to allow for _0, _1, etc.
    // suffixes when the file hits a duplicate name.
    $pos = strrpos($expected_path, '.');
    $base_path = substr($expected_path, 0, $pos);
    $extension = substr($expected_path, $pos + 1);

    $result = preg_match('/' . preg_quote($base_path, '/') . '(_[0-9]+)?\.' . preg_quote($extension, '/') . '/', $actual_path);
    $this->assertTrue($result, $message);
  }
}

/**
 * Test file token replacement in strings.
 */
class FileTokenReplaceTestCase extends FileFieldTestCase {
  public static function getInfo() {
    return array(
      'name' => 'File token replacement',
      'description' => 'Generates text using placeholders for dummy content to check file token replacement.',
      'group' => 'File',
    );
  }

  /**
   * Creates a file, then tests the tokens generated from it.
   */
  function testFileTokenReplacement() {
    global $language;
    $url_options = array(
      'absolute' => TRUE,
      'language' => $language,
    );

    // Create file field.
    $type_name = 'article';
    $field_name = 'field_' . strtolower($this->randomName());
    $this->createFileField($field_name, $type_name);
    $field = field_info_field($field_name);
    $instance = field_info_instance('node', $field_name, $type_name);

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

    // Create a new node with the uploaded file.
    $nid = $this->uploadNodeFile($test_file, $field_name, $type_name);

    // Load the node and the file.
    $node = node_load($nid, NULL, TRUE);
    $file = (object) $node->{$field_name}[LANGUAGE_NONE][0];
    $file->description = 'File description.';

    // Generate and test sanitized tokens.
    $tests = array();
    $tests['[file:fid]'] = $file->fid;
    $tests['[file:name]'] = check_plain($file->filename);
    $tests['[file:description]'] = filter_xss($file->description);
    $tests['[file:path]'] = filter_xss($file->uri);
    $tests['[file:mime]'] = filter_xss($file->filemime);
    $tests['[file:size]'] = format_size($file->filesize);
    $tests['[file:url]'] = url(file_create_url($file->uri), $url_options);
    $tests['[file:timestamp]'] = format_date($file->timestamp, 'medium', '', NULL, $language->language);
    $tests['[file:timestamp:short]'] = format_date($file->timestamp, 'short', '', NULL, $language->language);
    $tests['[file:owner]'] = $this->admin_user->name;
    $tests['[file:owner:uid]'] = $file->uid;

    // Test to make sure that we generated something for each token.
    $this->assertFalse(in_array(0, array_map('strlen', $tests)), t('No empty tokens generated.'));

    foreach ($tests as $input => $expected) {
      $output = token_replace($input, array('file' => $file), array('language' => $language));
      $this->assertFalse(strcmp($output, $expected), t('Sanitized file token %token replaced.', array('%token' => $input)));
    }

    // Generate and test unsanitized tokens.
    $tests['[file:name]'] = $file->filename;
    $tests['[file:description]'] = $file->description;
    $tests['[file:path]'] = $file->uri;
    $tests['[file:mime]'] = $file->filemime;
    $tests['[file:size]'] = format_size($file->filesize);

    foreach ($tests as $input => $expected) {
      $output = token_replace($input, array('file' => $file), array('language' => $language, 'sanitize' => FALSE));
      $this->assertFalse(strcmp($output, $expected), t('Unsanitized file token %token replaced.', array('%token' => $input)));
    }
  }
}