public function FormsFormStorageTestCase::testImmutableFormLegacyProtection

Verify that existing contrib code cannot overwrite immutable form state.

File

core/modules/simpletest/tests/form.test, line 1522

Unit tests for the Backdrop Form API.

Class

FormsFormStorageTestCase

Test the form storage on a multistep form.

Code

public function testImmutableFormLegacyProtection() {
  module_enable(array('dblog'));

  $this->backdropGet('form_test/form-storage', array('query' => array('cache' => 1, 'immutable' => 1)));
  $build_id_fields = $this->xpath('//input[@name="form_build_id"]');
  $this->assertEqual(count($build_id_fields), 1, 'One form build id field on the page');
  $build_id = (string) $build_id_fields[0]['value'];

  // Try to poison the form cache.
  $original = $this->backdropGetAJAX('form_test/form-storage-legacy/' . $build_id);
  $this->assertEqual($original['form']['#build_id_old'], $build_id, 'Original build_id was recorded');
  $this->assertNotEqual($original['form']['#build_id'], $build_id, 'New build_id was generated');

  // Assert that a watchdog message was logged by form_set_cache.
  $status = (bool) db_query_range('SELECT 1 FROM {watchdog} WHERE message = :message', 0, 1, array(':message' => 'Form build-id mismatch detected while attempting to store a form in the cache.'));
  $this->assert($status, 'A watchdog message was logged by form_set_cache');

  // Ensure that the form state was not poisoned by the preceding call.
  $original = $this->backdropGetAJAX('form_test/form-storage-legacy/' . $build_id);
  $this->assertEqual($original['form']['#build_id_old'], $build_id, 'Original build_id was recorded');
  $this->assertNotEqual($original['form']['#build_id'], $build_id, 'New build_id was generated');
  $this->assert(empty($original['form']['#poisoned']), 'Original form structure was preserved');
  $this->assert(empty($original['form_state']['poisoned']), 'Original form state was preserved');
}