diff -r 59d5596a9c6c -r d382dacfd73f rt/vm/src/test/java/org/apidesign/vm4brwsr/ExceptionsTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rt/vm/src/test/java/org/apidesign/vm4brwsr/ExceptionsTest.java	Tue Feb 26 16:54:16 2013 +0100
@@ -0,0 +1,114 @@
+/**
+ * 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.vm4brwsr;
+
+import javax.script.ScriptException;
+import static org.testng.Assert.*;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+
+/**
+ *
+ * @author Tomas Zezula <tzezula@netbeans.org>
+ */
+public class ExceptionsTest {
+    @Test
+    public void verifyMethodWithTryCatchNoThrow() throws Exception {
+            assertExec(
+                    "No throw",
+                    Exceptions.class,
+                    "methodWithTryCatchNoThrow__I",
+                    new Double(1.0));
+    }
+
+    @Test
+    public void catchJavaScriptStringAsThrowable() throws Exception {
+        assertExec(
+            "Throw hello!",
+            Exceptions.class,
+            "catchThrowableCatchesAll__Ljava_lang_String_2",
+            "Hello!"
+        );
+    }
+
+    @Test
+    public void verifyMethodWithTryCatchThrow() throws Exception {
+            assertExec(
+                    "Throw",
+                    Exceptions.class,
+                    "methodWithTryCatchThrow__I",
+                    new Double(2.0));
+    }
+    
+    @Test public void createObject() throws Exception {
+        assertExec("Object created", Exceptions.class, 
+            "newInstance__Ljava_lang_String_2Ljava_lang_String_2",
+            "java.lang.Object",
+            "java.lang.Object"
+        );
+    }
+
+    @Test public void createFloatFails() throws Exception {
+        assertExec("Float not created", Exceptions.class, 
+            "newInstance__Ljava_lang_String_2Ljava_lang_String_2",
+            "java.lang.Float",
+            "java.lang.Float"
+        );
+    }
+
+    @Test public void createUnknownFails() throws Exception {
+        assertExec("Object created", Exceptions.class, 
+            "newInstance__Ljava_lang_String_2Ljava_lang_String_2",
+            "CNFE:org.apidesign.Unknown",
+            "org.apidesign.Unknown"
+        );
+    }
+    
+    @Test public void testThreeCalls() throws Exception {
+        Object clazz = code.loadClass("loadClass", Exceptions.class.getName());
+        
+        String method = "readCounter__ILjava_lang_String_2";
+        
+        try {
+            Object ret = code.invokeMethod(clazz, method, "org.apidesign.Unknown");
+            fail("We expect an CNFE!");
+        } catch (ScriptException scriptException) {
+            // script exception should be OK
+        }
+        {
+            // 2nd invocation
+            Object ret = code.invokeMethod(clazz, method, "java.lang.String");
+            assertEquals(ret, Double.valueOf(2));
+        }
+        {
+            // 3rd invocation
+            Object ret = code.invokeMethod(clazz, method, "java.lang.Integer");
+            assertEquals(ret, Double.valueOf(3));
+        }
+    }
+    
+    private static TestVM code;
+    
+    @BeforeClass 
+    public void compileTheCode() throws Exception {
+        code = TestVM.compileClass("org/apidesign/vm4brwsr/Exceptions");
+    }
+    private static void assertExec(String msg, Class clazz, String method, Object expRes, Object... args) throws Exception {
+        code.assertExec(msg, clazz, method, expRes, args);
+    }
+}