function FileFieldRevisionTestCase::testRevisions in Drupal 7

Tests creating multiple revisions of a node and managing 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.

File

modules/file/tests/file.test, line 976

Tests for file.module.

Class

FileFieldRevisionTestCase

Tests file handling with node revisions.

Code

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, 'New file saved to disk on node creation.');
  $this
    ->assertFileEntryExists($node_file_r1, 'File entry exists in database on node creation.');
  $this
    ->assertFileIsPermanent($node_file_r1, '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, 'Replacement file exists on disk after creating new revision.');
  $this
    ->assertFileEntryExists($node_file_r2, 'Replacement file entry exists in database after creating new revision.');
  $this
    ->assertFileIsPermanent($node_file_r2, '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], 'Original file still in place after replacing file in new revision.');
  $this
    ->assertFileExists($node_file_r1, 'Original file still in place after replacing file in new revision.');
  $this
    ->assertFileEntryExists($node_file_r1, 'Original file entry still in place after replacing file in new revision');
  $this
    ->assertFileIsPermanent($node_file_r1, '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, 'Previous revision file still in place after creating a new revision without a new file.');
  $this
    ->assertFileIsPermanent($node_file_r3, '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, 'Original revision file still in place after reverting to the original revision.');
  $this
    ->assertFileIsPermanent($node_file_r4, '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, 'Second file is still available after deleting second revision, since it is being used by the third revision.');
  $this
    ->assertFileEntryExists($node_file_r3, 'Second file entry is still available after deleting second revision, since it is being used by the third revision.');
  $this
    ->assertFileIsPermanent($node_file_r3, '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, 'Second file is still available after deleting third revision, since it is being used by the user.');
  $this
    ->assertFileEntryExists($node_file_r3, 'Second file entry is still available after deleting third revision, since it is being used by the user.');
  $this
    ->assertFileIsPermanent($node_file_r3, '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, '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, '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, 'Original file is deleted after deleting the entire node with two revisions remaining.');
  $this
    ->assertFileEntryNotExists($node_file_r1, 'Original file entry is deleted after deleting the entire node with two revisions remaining.');
}