# HG changeset patch
# User Jaroslav Tulach <jaroslav.tulach@apidesign.org>
# Date 1360583203 -3600
# Node ID 59d5596a9c6ca48d2a0cbc8987ea20de35f8890c
# Parent  a9187d4aaa6bd3e778e91fc396b8e5a3417d7813
Encapsulation. Moving shared code into TestVM instance.

diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/ArrayTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/ArrayTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/ArrayTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -17,7 +17,6 @@
  */
 package org.apidesign.vm4brwsr;
 
-import javax.script.Invocable;
 import static org.testng.Assert.*;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
@@ -76,18 +75,13 @@
         assertExec("Returns 'false'", Array.class, "instanceOfArray__ZLjava_lang_Object_2", Double.valueOf(0), "non-array");
     }
     
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
     
     @BeforeClass 
     public void compileTheCode() throws Exception {
-        StringBuilder sb = new StringBuilder();
-        code = StaticMethodTest.compileClass(sb, 
-            "org/apidesign/vm4brwsr/Array"
-        );
-        codeSeq = sb;
+        code = TestVM.compileClass("org/apidesign/vm4brwsr/Array");
     }
     private static void assertExec(String msg, Class clazz, String method, Object expRes, Object... args) throws Exception {
-        StaticMethodTest.assertExec(code, codeSeq, msg, clazz, method, expRes, args);
+        code.assertExec(msg, clazz, method, expRes, args);
     }
 }
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/ClassTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/ClassTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/ClassTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -17,7 +17,6 @@
  */
 package org.apidesign.vm4brwsr;
 
-import javax.script.Invocable;
 import org.testng.annotations.Test;
 import static org.testng.Assert.*;
 import org.testng.annotations.BeforeClass;
@@ -185,22 +184,17 @@
         );
     }
     
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
     
     @BeforeClass
     public void compileTheCode() throws Exception {
-        if (codeSeq == null) {
-            StringBuilder sb = new StringBuilder();
-            code = StaticMethodTest.compileClass(sb, "org/apidesign/vm4brwsr/Classes");
-            codeSeq = sb;
-        }
+        code = TestVM.compileClass("org/apidesign/vm4brwsr/Classes");
     }
     
     private void assertExec(
         String msg, Class clazz, String method, Object expRes, Object... args
     ) throws Exception {
-        StaticMethodTest.assertExec(code, codeSeq, msg, clazz, method, expRes, args);
+        code.assertExec(msg, clazz, method, expRes, args);
     }
     
 }
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/ExceptionsTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/ExceptionsTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/ExceptionsTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -17,7 +17,6 @@
  */
 package org.apidesign.vm4brwsr;
 
-import javax.script.Invocable;
 import javax.script.ScriptException;
 import static org.testng.Assert.*;
 import org.testng.annotations.BeforeClass;
@@ -81,8 +80,7 @@
     }
     
     @Test public void testThreeCalls() throws Exception {
-        Object vm = code.invokeFunction("bck2brwsr");
-        Object clazz = code.invokeMethod(vm, "loadClass", Exceptions.class.getName());
+        Object clazz = code.loadClass("loadClass", Exceptions.class.getName());
         
         String method = "readCounter__ILjava_lang_String_2";
         
@@ -104,18 +102,13 @@
         }
     }
     
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
     
     @BeforeClass 
     public void compileTheCode() throws Exception {
-        StringBuilder sb = new StringBuilder();
-        code = StaticMethodTest.compileClass(sb, 
-            "org/apidesign/vm4brwsr/Exceptions"
-        );
-        codeSeq = sb;
+        code = TestVM.compileClass("org/apidesign/vm4brwsr/Exceptions");
     }
     private static void assertExec(String msg, Class clazz, String method, Object expRes, Object... args) throws Exception {
-        StaticMethodTest.assertExec(code, codeSeq, msg, clazz, method, expRes, args);
+        code.assertExec(msg, clazz, method, expRes, args);
     }
 }
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/InstanceTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/InstanceTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/InstanceTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -17,7 +17,6 @@
  */
 package org.apidesign.vm4brwsr;
 
-import javax.script.Invocable;
 import org.testng.annotations.Test;
 import org.testng.annotations.BeforeClass;
 
@@ -151,22 +150,17 @@
         return "org/apidesign/vm4brwsr/Instance";
     }
     
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
     
     @BeforeClass
     public void compileTheCode() throws Exception {
-        if (codeSeq == null) {
-            StringBuilder sb = new StringBuilder();
-            code = StaticMethodTest.compileClass(sb, startCompilationWith());
-            codeSeq = sb;
-        }
+        code = TestVM.compileClass(startCompilationWith());
     }
     
     private void assertExec(
         String msg, Class clazz, String method, Object expRes, Object... args
     ) throws Exception {
-        StaticMethodTest.assertExec(code, codeSeq, msg, clazz, method, expRes, args);
+        code.assertExec(msg, clazz, method, expRes, args);
     }
     
 }
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/NumberTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/NumberTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/NumberTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -17,8 +17,6 @@
  */
 package org.apidesign.vm4brwsr;
 
-import javax.script.Invocable;
-import javax.script.ScriptException;
 import static org.testng.Assert.*;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
@@ -690,22 +688,17 @@
         );
     }
 
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
 
     @BeforeClass
     public void compileTheCode() throws Exception {
-        if (codeSeq == null) {
-            StringBuilder sb = new StringBuilder();
-            code = StaticMethodTest.compileClass(sb, "org/apidesign/vm4brwsr/Numbers");
-            codeSeq = sb;
-        }
+        code = TestVM.compileClass("org/apidesign/vm4brwsr/Numbers");
     }
 
     private static void assertExec(
         String msg, Class<?> clazz, String method, Object expRes, Object... args) throws Exception
     {
-        Object ret = TestUtils.execCode(code, codeSeq, msg, clazz, method, expRes, args);
+        Object ret = code.execCode(msg, clazz, method, expRes, args);
         if (ret == null) {
             return;
         }
@@ -713,10 +706,10 @@
             double expD = ((Double)expRes).doubleValue();
             double retD = ((Double)ret).doubleValue();
             assertEquals(retD, expD, 0.000004, msg + " "
-                    + StaticMethodTest.dumpJS(codeSeq));
+                    + code.toString());
             return;
         }
-        assertEquals(ret, expRes, msg + " " + StaticMethodTest.dumpJS(codeSeq));
+        assertEquals(ret, expRes, msg + " " + code.toString());
     }
     
 }
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/StaticMethodTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -17,16 +17,6 @@
  */
 package org.apidesign.vm4brwsr;
 
-import java.io.File;
-import java.io.FileWriter;
-import java.io.IOException;
-import java.io.InputStream;
-import java.net.URL;
-import java.util.Enumeration;
-import javax.script.Invocable;
-import javax.script.ScriptEngine;
-import javax.script.ScriptEngineManager;
-import javax.script.ScriptException;
 import static org.testng.Assert.*;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
@@ -331,88 +321,18 @@
         );
     }
     
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
     
     @BeforeClass 
     public void compileTheCode() throws Exception {
         StringBuilder sb = new StringBuilder();
-        code = compileClass(sb, "org/apidesign/vm4brwsr/StaticMethod");
-        codeSeq = sb;
-    }
-    
-    
-    private static void assertExec(
-        String msg, Class clazz, String method, 
-        Object expRes, Object... args
-    ) throws Exception {
-        assertExec(code, codeSeq, msg, clazz, method, expRes, args);
-    }
-    static void assertExec(
-        Invocable toRun, CharSequence theCode,
-        String msg, Class clazz, String method, 
-        Object expRes, Object... args
-    ) throws Exception {
-        Object ret = TestUtils.execCode(toRun, theCode, msg, clazz, method, expRes, args);
-        if (ret == null) {
-            return;
-        }
-        if (expRes != null && expRes.equals(ret)) {
-            return;
-        }
-        assertEquals(ret, expRes, msg + "was: " + ret + "\n" + dumpJS(theCode));
-        
+        code = TestVM.compileClass(sb, "org/apidesign/vm4brwsr/StaticMethod");
     }
 
-    static Invocable compileClass(StringBuilder sb, String... names) throws ScriptException, IOException {
-        return compileClass(sb, null, names);
-    }
-    static Invocable compileClass(
-        StringBuilder sb, ScriptEngine[] eng, String... names
-    ) throws ScriptException, IOException {
-        if (sb == null) {
-            sb = new StringBuilder();
-        }
-        Bck2Brwsr.generate(sb, new EmulationResources(), names);
-        ScriptEngineManager sem = new ScriptEngineManager();
-        ScriptEngine js = sem.getEngineByExtension("js");
-        if (eng != null) {
-            eng[0] = js;
-        }
-        try {
-            Object res = js.eval(sb.toString());
-            assertTrue(js instanceof Invocable, "It is invocable object: " + res);
-            return (Invocable)js;
-        } catch (Exception ex) {
-            if (sb.length() > 2000) {
-                sb = dumpJS(sb);
-            }
-            fail("Could not evaluate:\n" + sb, ex);
-            return null;
-        }
-    }
-    static StringBuilder dumpJS(CharSequence sb) throws IOException {
-        File f = File.createTempFile("execution", ".js");
-        FileWriter w = new FileWriter(f);
-        w.append(sb);
-        w.close();
-        return new StringBuilder(f.getPath());
-    }
-    private static class EmulationResources implements Bck2Brwsr.Resources {
-        @Override
-        public InputStream get(String name) throws IOException {
-            Enumeration<URL> en = StaticMethodTest.class.getClassLoader().getResources(name);
-            URL u = null;
-            while (en.hasMoreElements()) {
-                u = en.nextElement();
-            }
-            if (u == null) {
-                throw new IOException("Can't find " + name);
-            }
-            if (u.toExternalForm().contains("rt.jar!")) {
-                throw new IOException("No emulation for " + u);
-            }
-            return u.openStream();
-        }
+    private void assertExec(
+        String msg, Class<?> clazz, String method, 
+        Object ret, Object... args
+    ) throws Exception {
+        code.assertExec(msg, clazz, method, ret, args);
     }
 }
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/StringTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/StringTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/StringTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -17,7 +17,6 @@
  */
 package org.apidesign.vm4brwsr;
 
-import javax.script.Invocable;
 import org.testng.annotations.Test;
 import static org.testng.Assert.*;
 import org.testng.annotations.BeforeClass;
@@ -194,23 +193,20 @@
         
     }
     
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
     
     @BeforeClass 
     public void compileTheCode() throws Exception {
-        StringBuilder sb = new StringBuilder();
-        code = StaticMethodTest.compileClass(sb, 
+        code = TestVM.compileClass(
             "org/apidesign/vm4brwsr/StringSample",
             "java/lang/String"
         );
-        codeSeq = sb;
     }
     
     private static void assertExec(String msg, 
         Class<?> clazz, String method, Object expRes, Object... args
     ) throws Exception {
-        StaticMethodTest.assertExec(code, codeSeq, msg, clazz, method, expRes, args);
+        code.assertExec(msg, clazz, method, expRes, args);
     }
     
 }
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/TestUtils.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/TestUtils.java	Sun Feb 10 19:33:35 2013 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,60 +0,0 @@
-/**
- * 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.Invocable;
-import javax.script.ScriptException;
-import static org.testng.Assert.*;
-
-class TestUtils {
-
-    static Object execCode(Invocable code, CharSequence codeSeq,
-        String msg, Class<?> clazz, String method, Object expRes, Object... args) 
-            throws Exception
-    {
-        Object ret = null;
-        try {
-            ret = code.invokeFunction("bck2brwsr");
-            ret = code.invokeMethod(ret, "loadClass", clazz.getName());
-            ret = code.invokeMethod(ret, method, args);
-        } catch (ScriptException ex) {
-            fail("Execution failed in " + StaticMethodTest.dumpJS(codeSeq), ex);
-        } catch (NoSuchMethodException ex) {
-            fail("Cannot find method in " + StaticMethodTest.dumpJS(codeSeq), ex);
-        }
-        if (ret == null && expRes == null) {
-            return null;
-        }
-        if (expRes.equals(ret)) {
-            return null;
-        }
-        if (expRes instanceof Number) {
-            // in case of Long it is necessary convert it to number
-            // since the Long is represented by two numbers in JavaScript
-            try {
-                ret = code.invokeMethod(ret, "toFP");
-                ret = code.invokeFunction("Number", ret);
-            } catch (ScriptException ex) {
-                fail("Conversion to number failed in " + StaticMethodTest.dumpJS(codeSeq), ex);
-            } catch (NoSuchMethodException ex) {
-                fail("Cannot find global Number(x) function in " + StaticMethodTest.dumpJS(codeSeq), ex);
-            }
-        }
-        return ret;
-    }
-}
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/TestVM.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/TestVM.java	Mon Feb 11 12:46:43 2013 +0100
@@ -0,0 +1,170 @@
+/**
+ * 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 java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.Enumeration;
+import javax.script.Invocable;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import javax.script.ScriptException;
+import static org.testng.Assert.*;
+
+final class TestVM {
+    private final Invocable code;
+    private final CharSequence codeSeq;
+    private final Object bck2brwsr;
+    
+    
+    private TestVM(Invocable code, CharSequence codeSeq) throws ScriptException, NoSuchMethodException {
+        this.code = code;
+        this.codeSeq = codeSeq;
+        this.bck2brwsr = code.invokeFunction("bck2brwsr");
+    }
+    
+
+    public Object execCode(
+        String msg, Class<?> clazz, String method, 
+        Object expRes, Object... args
+    ) throws Exception {
+        Object ret = null;
+        try {
+            ret = code.invokeMethod(bck2brwsr, "loadClass", clazz.getName());
+            ret = code.invokeMethod(ret, method, args);
+        } catch (ScriptException ex) {
+            fail("Execution failed in " + dumpJS(codeSeq), ex);
+        } catch (NoSuchMethodException ex) {
+            fail("Cannot find method in " + dumpJS(codeSeq), ex);
+        }
+        if (ret == null && expRes == null) {
+            return null;
+        }
+        if (expRes.equals(ret)) {
+            return null;
+        }
+        if (expRes instanceof Number) {
+            // in case of Long it is necessary convert it to number
+            // since the Long is represented by two numbers in JavaScript
+            try {
+                ret = code.invokeMethod(ret, "toFP");
+                ret = code.invokeFunction("Number", ret);
+            } catch (ScriptException ex) {
+                fail("Conversion to number failed in " + dumpJS(codeSeq), ex);
+            } catch (NoSuchMethodException ex) {
+                fail("Cannot find global Number(x) function in " + dumpJS(codeSeq), ex);
+            }
+        }
+        return ret;
+    }
+    
+    void assertExec(
+        String msg, Class clazz, String method, Object expRes, Object... args
+    ) throws Exception {
+        Object ret = execCode(msg, clazz, method, expRes, args);
+        if (ret == null) {
+            return;
+        }
+        if (expRes != null && expRes.equals(ret)) {
+            return;
+        }
+        assertEquals(ret, expRes, msg + "was: " + ret + "\n" + dumpJS(codeSeq));
+    }    
+
+    static TestVM compileClass(String... names) throws ScriptException, IOException {
+        return compileClass(null, names);
+    }
+    
+    static TestVM compileClass(StringBuilder sb, String... names) throws ScriptException, IOException {
+        return compileClass(sb, null, names);
+    }
+
+    static TestVM compileClass(StringBuilder sb, ScriptEngine[] eng, String... names) throws ScriptException, IOException {
+        if (sb == null) {
+            sb = new StringBuilder();
+        }
+        Bck2Brwsr.generate(sb, new EmulationResources(), names);
+        ScriptEngineManager sem = new ScriptEngineManager();
+        ScriptEngine js = sem.getEngineByExtension("js");
+        if (eng != null) {
+            eng[0] = js;
+        }
+        try {
+            Object res = js.eval(sb.toString());
+            assertTrue(js instanceof Invocable, "It is invocable object: " + res);
+            return new TestVM((Invocable) js, sb);
+        } catch (Exception ex) {
+            if (sb.length() > 2000) {
+                sb = dumpJS(sb);
+            }
+            fail("Could not evaluate:\n" + sb, ex);
+            return null;
+        }
+    }
+
+    Object loadClass(String loadClass, String name) throws ScriptException, NoSuchMethodException {
+        return code.invokeMethod(bck2brwsr, "loadClass", Exceptions.class.getName());
+    }
+    
+    Object invokeMethod(Object obj, String method, Object... params) throws ScriptException, NoSuchMethodException {
+        return code.invokeMethod(obj, method, params);
+    }
+
+    Object invokeFunction(String methodName, Object... args) throws ScriptException, NoSuchMethodException {
+        return code.invokeFunction(methodName, args);
+    }
+
+    static StringBuilder dumpJS(CharSequence sb) throws IOException {
+        File f = File.createTempFile("execution", ".js");
+        FileWriter w = new FileWriter(f);
+        w.append(sb);
+        w.close();
+        return new StringBuilder(f.getPath());
+    }
+
+    @Override
+    public String toString() {
+        try {
+            return dumpJS(codeSeq).toString();
+        } catch (IOException ex) {
+            return ex.toString();
+        }
+    }
+    
+    
+    private static class EmulationResources implements Bck2Brwsr.Resources {
+        @Override
+        public InputStream get(String name) throws IOException {
+            Enumeration<URL> en = StaticMethodTest.class.getClassLoader().getResources(name);
+            URL u = null;
+            while (en.hasMoreElements()) {
+                u = en.nextElement();
+            }
+            if (u == null) {
+                throw new IOException("Can't find " + name);
+            }
+            if (u.toExternalForm().contains("rt.jar!")) {
+                throw new IOException("No emulation for " + u);
+            }
+            return u.openStream();
+        }
+    }
+}
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/VMLazyTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/VMLazyTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/VMLazyTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -17,7 +17,6 @@
  */
 package org.apidesign.vm4brwsr;
 
-import javax.script.Invocable;
 import javax.script.ScriptContext;
 import javax.script.ScriptEngine;
 import javax.script.ScriptException;
@@ -30,10 +29,7 @@
  * @author Jaroslav Tulach <jtulach@netbeans.org>
  */
 public class VMLazyTest {
-
-    
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
 
     @BeforeClass
     public void compileTheCode() throws Exception {
@@ -50,11 +46,10 @@
         sb.append("\n}");
        
         ScriptEngine[] arr = { null };
-        code = StaticMethodTest.compileClass(sb, arr,
+        code = TestVM.compileClass(sb, arr,
             new String[]{"org/apidesign/vm4brwsr/VM", "org/apidesign/vm4brwsr/StaticMethod"}
         );
         arr[0].getContext().setAttribute("loader", new BytesLoader(), ScriptContext.ENGINE_SCOPE);
-        codeSeq = sb;
     }
     
     @Test public void invokeStaticMethod() throws Exception {
@@ -83,9 +78,9 @@
         try {
             ret = code.invokeFunction(methodName, args);
         } catch (ScriptException ex) {
-            fail("Execution failed in\n" + StaticMethodTest.dumpJS(codeSeq), ex);
+            fail("Execution failed in\n" + code.toString(), ex);
         } catch (NoSuchMethodException ex) {
-            fail("Cannot find method in\n" + StaticMethodTest.dumpJS(codeSeq), ex);
+            fail("Cannot find method in\n" + code.toString(), ex);
         }
         if (ret == null && expRes == null) {
             return;
@@ -93,6 +88,6 @@
         if (expRes.equals(ret)) {
             return;
         }
-        assertEquals(ret, expRes, msg + "was: " + ret + "\n" + StaticMethodTest.dumpJS(codeSeq));
+        assertEquals(ret, expRes, msg + "was: " + ret + "\n" + code.toString());
     }
 }
diff -r a9187d4aaa6b -r 59d5596a9c6c vm/src/test/java/org/apidesign/vm4brwsr/VMinVMTest.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/VMinVMTest.java	Sun Feb 10 19:33:35 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/VMinVMTest.java	Mon Feb 11 12:46:43 2013 +0100
@@ -21,7 +21,6 @@
 import java.io.FileWriter;
 import java.io.IOException;
 import static org.testng.Assert.*;
-import javax.script.Invocable;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
@@ -30,9 +29,7 @@
  * @author Jaroslav Tulach <jtulach@netbeans.org>
  */
 public class VMinVMTest {
-
-    private static CharSequence codeSeq;
-    private static Invocable code;
+    private static TestVM code;
     
     @Test public void compareGeneratedCodeForArrayClass() throws Exception {
         compareCode("org/apidesign/vm4brwsr/Array.class");
@@ -44,11 +41,7 @@
 
     @BeforeClass
     public void compileTheCode() throws Exception {
-        StringBuilder sb = new StringBuilder();
-        code = StaticMethodTest.compileClass(sb, 
-            "org/apidesign/vm4brwsr/VMinVM"
-        );
-        codeSeq = sb;
+        code = TestVM.compileClass("org/apidesign/vm4brwsr/VMinVM");
     }
     
     private void compareCode(final String nm) throws Exception, IOException {
@@ -73,7 +66,7 @@
                 }
             }
             w.append("\n];\n");
-            w.append(codeSeq);
+            w.append(code.toString());
             w.close();
             throw new Exception(ex.getMessage() + " file: " + f, ex);
         }
@@ -83,11 +76,11 @@
         
         if (!ret1.toString().equals(ret)) {
             StringBuilder msg = new StringBuilder("Difference found between ");
-            msg.append(StaticMethodTest.dumpJS(ret1));
+            msg.append(TestVM.dumpJS(ret1));
             msg.append(" ");
-            msg.append(StaticMethodTest.dumpJS((CharSequence) ret));
+            msg.append(TestVM.dumpJS((CharSequence) ret));
             msg.append(" compiled by ");
-            msg.append(StaticMethodTest.dumpJS(codeSeq));
+            msg.append(code.toString());
             fail(msg.toString());
         }
     }