diff -r 59b9f9f5364f -r b671ac44bc55 vmtest/src/main/java/org/apidesign/bck2brwsr/vmtest/Compare.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vmtest/src/main/java/org/apidesign/bck2brwsr/vmtest/Compare.java	Mon Dec 17 17:45:08 2012 +0100
@@ -0,0 +1,36 @@
+/**
+ * Back 2 Browser Bytecode Translator
+ * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. Look for COPYING file in the top folder.
+ * If not, see http://opensource.org/licenses/GPL-2.0.
+ */
+package org.apidesign.bck2brwsr.vmtest;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/** Can be applied on a method that yields a return value. 
+ * Together with {@link VMTest#create} it can be used to write
+ * methods which are executed in real as well as JavaScript VMs and
+ * their results are compared.
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.METHOD)
+public @interface Compare {
+    
+}