launcher/fx/src/test/java/org/apidesign/bck2brwsr/launcher/fximpl/JsClassLoaderTest.java
2 * Back 2 Browser Bytecode Translator
3 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, version 2 of the License.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. Look for COPYING file in the top folder.
16 * If not, see http://opensource.org/licenses/GPL-2.0.
18 package org.apidesign.bck2brwsr.launcher.fximpl;
20 import java.lang.reflect.InvocationTargetException;
21 import java.lang.reflect.Method;
23 import javax.script.Invocable;
24 import javax.script.ScriptEngine;
25 import javax.script.ScriptEngineManager;
26 import javax.script.ScriptException;
27 import org.objectweb.asm.signature.SignatureReader;
28 import static org.testng.Assert.*;
29 import org.testng.annotations.BeforeClass;
30 import org.testng.annotations.Test;
34 * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
36 public class JsClassLoaderTest {
37 private static ClassLoader loader;
38 private static Class<?> methodClass;
40 public JsClassLoaderTest() {
44 public static void setUpClass() throws Exception {
45 ScriptEngineManager sem = new ScriptEngineManager();
46 final ScriptEngine eng = sem.getEngineByMimeType("text/javascript");
48 URL my = JsClassLoaderTest.class.getProtectionDomain().getCodeSource().getLocation();
49 ClassLoader parent = JsClassLoaderTest.class.getClassLoader().getParent();
50 loader = new JsClassLoader(new URL[] { my }, parent) {
52 protected Fn defineFn(String code, String... names) {
53 StringBuilder sb = new StringBuilder();
54 sb.append("(function() {");
55 sb.append("var r = {};");
56 sb.append("r.fn = function(");
58 for (String n : names) {
66 sb.append("return r;");
69 final Object val = eng.eval(sb.toString());
72 public Object invoke(Object... args) throws Exception {
73 Invocable inv = (Invocable)eng;
74 return inv.invokeMethod(val, "fn", args);
77 } catch (ScriptException ex) {
78 throw new LinkageError("Can't parse: " + sb, ex);
83 methodClass = loader.loadClass(JsMethods.class.getName());
86 @Test public void noParamMethod() throws Throwable {
87 Method plus = methodClass.getMethod("fortyTwo");
89 final Object val = plus.invoke(null);
90 assertTrue(val instanceof Number, "A number returned " + val);
91 assertEquals(((Number)val).intValue(), 42);
92 } catch (InvocationTargetException ex) {
93 throw ex.getTargetException();
97 @Test public void testExecuteScript() throws Throwable {
98 Method plus = methodClass.getMethod("plus", int.class, int.class);
100 assertEquals(plus.invoke(null, 10, 20), 30);
101 } catch (InvocationTargetException ex) {
102 throw ex.getTargetException();