Index: testrunner.js
===================================================================
--- testrunner.js	(revision 5843)
+++ testrunner.js	(working copy)
@@ -217,6 +217,20 @@
 }
 
 /**
+ * Asserts that the object is null.
+ */
+function isNull(a, msg){
+    _config.Test.push( [ a === null, msg ] );
+}
+
+/**
+ * Asserts that the object is not null.
+ */
+function notNull(a, msg){
+    _config.Test.push( [ a != null, msg ] );
+}
+
+/**
  * Asserts that two arrays are the same
  */
 function isSet(a, b, msg) {