Fixing tests by ensuring allPageToCache is defind on SiteTree

tests/FilesystemPublisherTest.php

@@ -12,6 +12,12 @@ class FilesystemPublisherTest extends SapphireTest
     
     protected $orig = array();
 
+    protected $requiredExtensions = array(
+        'SiteTree' => array(
+            'StaticPublisherTest_SiteTreeDecorator',
+        ),
+    );
+
     public function setUp()
     {
         parent::setUp();
@@ -259,3 +265,12 @@ class StaticPublisherTestPage_Controller extends Page_Controller implements Test
         return $response;
     }
 }
+
+class StaticPublisherTest_SiteTreeDecorator extends DataExtension implements TestOnly
+{
+
+    public function allPagesToCache() {
+        return array();
+    }
+
+}