performance-art.fr/modules/simpletest/tests/boot.test

<?php

/**
 * Perform early bootstrap tests.
 */
class EarlyBootstrapTestCase extends DrupalWebTestCase {
  public static function getInfo() {
    return array(
      'name'  => 'Early bootstrap test',
      'description'  => 'Confirm that calling module_implements() during early bootstrap does not pollute the module_implements() cache.',
      'group' => 'System',
    );
  }

  function setUp() {
    parent::setUp('boot_test_1', 'boot_test_2');
  }

  /**
   * Test hook_boot() on both regular and "early exit" pages.
   */
  public function testHookBoot() {
    $paths = array('', 'early_exit');
    foreach ($paths as $path) {
      // Empty the module_implements() caches.
      module_implements(NULL, FALSE, TRUE);
      // Do a request to the front page, which will call module_implements()
      // during hook_boot().
      $this->drupalGet($path);
      // Reset the static cache so we get implementation data from the persistent
      // cache.
      drupal_static_reset();
      // Make sure we get a full list of all modules implementing hook_help().
      $modules = module_implements('help');
      $this->assertTrue(in_array('boot_test_2', $modules));
    }
  }
}