Refs #4208 refactor some singletons

1 files changed, 9 insertions, 0 deletions

diff --git a/core/Singleton.php b/core/Singleton.php
index 7e7679c67a..73bbd26196 100644
--- a/core/Singleton.php
+++ b/core/Singleton.php
@@ -34,4 +34,13 @@ class Singleton
         $class = get_called_class();
         unset(self::$instances[$class]);
     }
+
+    /**
+     * Sets the singleton instance. For testing purposes.
+     */
+    public static function setSingletonInstance($instance)
+    {
+        $class = get_called_class();
+        self::$instances[$class] = $instance;
+    }
 }