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 java.net.URLClassLoader;
24 import javax.script.Invocable;
25 import javax.script.ScriptEngine;
26 import javax.script.ScriptEngineManager;
27 import javax.script.ScriptException;
28 import org.objectweb.asm.signature.SignatureReader;
29 import static org.testng.Assert.*;
30 import org.testng.annotations.BeforeClass;
31 import org.testng.annotations.Test;
35 * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
37 public class JsClassLoaderTest {
38 private static ClassLoader loader;
39 private static Class<?> methodClass;
41 public JsClassLoaderTest() {
45 public static void setUpClass() throws Exception {
46 ScriptEngineManager sem = new ScriptEngineManager();
47 final ScriptEngine eng = sem.getEngineByMimeType("text/javascript");
49 final URL my = JsClassLoaderTest.class.getProtectionDomain().getCodeSource().getLocation();
50 ClassLoader parent = JsClassLoaderTest.class.getClassLoader().getParent();
51 final URLClassLoader ul = new URLClassLoader(new URL[] { my }, parent);
52 loader = new JsClassLoader(parent) {
54 protected URL findResource(String name) {
55 return ul.getResource(name);
58 protected Fn defineFn(String code, String... names) {
59 StringBuilder sb = new StringBuilder();
60 sb.append("(function() {");
61 sb.append("var r = {};");
62 sb.append("r.fn = function(");
64 for (String n : names) {
72 sb.append("return r;");
75 final Object val = eng.eval(sb.toString());
78 public Object invoke(Object... args) throws Exception {
79 Invocable inv = (Invocable)eng;
80 return inv.invokeMethod(val, "fn", args);
83 } catch (ScriptException ex) {
84 throw new LinkageError("Can't parse: " + sb, ex);
89 methodClass = loader.loadClass(JsMethods.class.getName());
92 @Test public void noParamMethod() throws Throwable {
93 Method plus = methodClass.getMethod("fortyTwo");
95 final Object val = plus.invoke(null);
96 assertTrue(val instanceof Number, "A number returned " + val);
97 assertEquals(((Number)val).intValue(), 42);
98 } catch (InvocationTargetException ex) {
99 throw ex.getTargetException();
103 @Test public void testExecuteScript() throws Throwable {
104 Method plus = methodClass.getMethod("plus", int.class, int.class);
106 assertEquals(plus.invoke(null, 10, 20), 30);
107 } catch (InvocationTargetException ex) {
108 throw ex.getTargetException();