diff -r 7579a0ee92fb -r b671ac44bc55 vmtest/src/test/java/org/apidesign/bck2brwsr/tck/CompareStringsTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vmtest/src/test/java/org/apidesign/bck2brwsr/tck/CompareStringsTest.java	Mon Dec 17 17:45:08 2012 +0100
@@ -0,0 +1,110 @@
+/**
+ * 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.tck;
+
+import java.net.MalformedURLException;
+import java.net.URL;
+import org.apidesign.bck2brwsr.vmtest.Compare;
+import org.apidesign.bck2brwsr.vmtest.VMTest;
+import org.testng.annotations.Factory;
+
+/**
+ *
+ * @author Jaroslav Tulach <jtulach@netbeans.org>
+ */
+public class CompareStringsTest {
+    @Compare public static Object compareURLs() throws MalformedURLException {
+        return new URL("http://apidesign.org:8080/wiki/").toExternalForm().toString();
+    }
+    
+    @Compare public String deleteLastTwoCharacters() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("453.0");
+        if (sb.toString().endsWith(".0")) {
+            final int l = sb.length();
+            sb.delete(l - 2, l);
+        }
+        return sb.toString().toString();
+    }
+    
+    @Compare public String nameOfStringClass() throws Exception {
+        return Class.forName("java.lang.String").getName();
+    }
+    @Compare public String nameOfArrayClass() throws Exception {
+        return Class.forName("org.apidesign.bck2brwsr.tck.CompareHashTest").getName();
+    }
+    
+    @Compare public String lowerHello() {
+        return "HeLlO".toLowerCase();
+    }
+    
+    @Compare public String lowerA() {
+        return String.valueOf(Character.toLowerCase('A')).toString();
+    }
+    @Compare public String upperHello() {
+        return "hello".toUpperCase();
+    }
+    
+    @Compare public String upperA() {
+        return String.valueOf(Character.toUpperCase('a')).toString();
+    }
+    
+    @Compare public boolean matchRegExp() throws Exception {
+        return "58038503".matches("\\d*");
+    }
+
+    @Compare public boolean doesNotMatchRegExp() throws Exception {
+        return "58038503GH".matches("\\d*");
+    }
+
+    @Compare public boolean doesNotMatchRegExpFully() throws Exception {
+        return "Hello".matches("Hell");
+    }
+    
+    @Compare public String variousCharacterTests() throws Exception {
+        StringBuilder sb = new StringBuilder();
+        
+        sb.append(Character.isUpperCase('a'));
+        sb.append(Character.isUpperCase('A'));
+        sb.append(Character.isLowerCase('a'));
+        sb.append(Character.isLowerCase('A'));
+        
+        sb.append(Character.isLetter('A'));
+        sb.append(Character.isLetterOrDigit('9'));
+        sb.append(Character.isLetterOrDigit('A'));
+        sb.append(Character.isLetter('0'));
+        
+        return sb.toString().toString();
+    }
+        
+    @Compare
+    public String nullFieldInitialized() {
+        NullField nf = new NullField();
+        return ("" + nf.name).toString();
+    }
+
+    @Factory
+    public static Object[] create() {
+        return VMTest.create(CompareStringsTest.class);
+    }
+
+    private static final class NullField {
+
+        String name;
+    }
+}