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[lhc/web/wiklou.git] / includes / PageProps.php

diff --git a/includes/PageProps.php b/includes/PageProps.php
index bc3e3f1..3654384 100644 (file)
--- a/includes/PageProps.php
+++ b/includes/PageProps.php
@@ -33,6 +33,33 @@ class PageProps {
         */
        private static $instance;
 
+       /**
+        * Overrides the default instance of this class
+        * This is intended for use while testing and will fail if MW_PHPUNIT_TEST is not defined.
+        *
+        * If this method is used it MUST also be called with null after a test to ensure a new
+        * default instance is created next time getInstance is called.
+        *
+        * @since 1.27
+        *
+        * @param PageProps|null $store
+        *
+        * @return ScopedCallback to reset the overridden value
+        * @throws MWException
+        */
+       public static function overrideInstance( PageProps $store = null ) {
+               if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
+                       throw new MWException(
+                               'Cannot override ' . __CLASS__ . 'default instance in operation.'
+                       );
+               }
+               $previousValue = self::$instance;
+               self::$instance = $store;
+               return new ScopedCallback( function() use ( $previousValue ) {
+                       self::$instance = $previousValue;
+               } );
+       }
+
        /**
         * @return PageProps
         */