diff -r 07239de796bb -r e756a8c72c3d cms/drupal/modules/simpletest/tests/boot.test
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cms/drupal/modules/simpletest/tests/boot.test	Fri Sep 08 12:04:06 2017 +0200
@@ -0,0 +1,38 @@
+<?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));
+    }
+  }
+}