function ThemeRegistryTestCase::testRaceCondition in Drupal 7

Tests the behavior of the theme registry class.

File

modules/simpletest/tests/theme.test, line 573

Tests for the theme API.

Class

ThemeRegistryTestCase

Tests for the ThemeRegistry class.

Code

function testRaceCondition() {
  $_SERVER['REQUEST_METHOD'] = 'GET';
  $cid = 'test_theme_registry';

  // Directly instantiate the theme registry, this will cause a base cache
  // entry to be written in __construct().
  $registry = new ThemeRegistry($cid, 'cache');
  $this
    ->assertTrue(cache_get($cid), 'Cache entry was created.');

  // Trigger a cache miss for an offset.
  $this
    ->assertTrue($registry['theme_test_template_test'], 'Offset was returned correctly from the theme registry.');

  // This will cause the ThemeRegistry class to write an updated version of
  // the cache entry when it is destroyed, usually at the end of the request.
  // Before that happens, manually delete the cache entry we created earlier
  // so that the new entry is written from scratch.
  cache_clear_all($cid, 'cache');

  // Destroy the class so that it triggers a cache write for the offset.
  unset($registry);
  $this
    ->assertTrue(cache_get($cid), 'Cache entry was created.');

  // Create a new instance of the class. Confirm that both the offset
  // requested previously, and one that has not yet been requested are both
  // available.
  $registry = new ThemeRegistry($cid, 'cache');
  $this
    ->assertTrue($registry['theme_test_template_test'], 'Offset was returned correctly from the theme registry');
  $this
    ->assertTrue($registry['theme_test_template_test_2'], 'Offset was returned correctly from the theme registry');
}