- Patch #663828 by chx: allow core tests to be programmatically disabled.

modules/simpletest/simpletest.api.php

@@ -11,6 +11,21 @@
  * @{
  */
 
+/**
+ * Alter the list of tests.
+ *
+ * @param $groups
+ *   A two dimension array, the first key is the test group (as defined in
+ *   getInfo) the second is the name of the class and the value is the return
+ *   value of the getInfo method.
+ */
+function hook_simpletest_alter(&$groups) {
+  // An alternative session handler module would not want to run the original
+  // Session https handling test because it checks the sessions table in the
+  // database.
+  unset($groups['Session']['testHttpsSession']);
+}
+
 /**
  * A test group has started.
  *

modules/simpletest/simpletest.module

@@ -368,6 +368,8 @@ function simpletest_test_get_all() {
         uksort($tests, 'strnatcasecmp');
       }
 
+      // Allow modules extending core tests to disable originals.
+      drupal_alter('simpletest', $groups);
       cache_set('simpletest', $groups);
     }
   }