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 static org.testng.Assert.*;
28 import org.testng.annotations.BeforeClass;
29 import org.testng.annotations.Test;
33 * @author Jaroslav Tulach <jaroslav.tulach@apidesign.org>
35 public class JsClassLoaderTest {
36 private static ClassLoader loader;
37 private static Class<?> methodClass;
39 public JsClassLoaderTest() {
43 public static void setUpClass() throws Exception {
44 ScriptEngineManager sem = new ScriptEngineManager();
45 final ScriptEngine eng = sem.getEngineByMimeType("text/javascript");
47 URL my = JsClassLoaderTest.class.getProtectionDomain().getCodeSource().getLocation();
48 ClassLoader parent = JsClassLoaderTest.class.getClassLoader().getParent();
49 loader = new JsClassLoader(new URL[] { my }, parent) {
51 protected JsClassLoader.Fn defineFn(String code, String... names) {
52 StringBuilder sb = new StringBuilder();
53 sb.append("(function() {");
54 sb.append("var r = {};");
55 sb.append("r.fn = function(");
57 for (String n : names) {
65 sb.append("return r;");
68 final Object val = eng.eval(sb.toString());
69 return new JsClassLoader.Fn() {
71 public Object invoke(Object... args) throws Exception {
72 Invocable inv = (Invocable)eng;
73 return inv.invokeMethod(val, "fn", args);
76 } catch (ScriptException ex) {
77 throw new LinkageError("Can't parse: " + sb, ex);
82 methodClass = loader.loadClass(JsMethods.class.getName());
85 @Test public void noParamMethod() throws Throwable {
86 Method plus = methodClass.getMethod("fortyTwo");
88 final Object val = plus.invoke(null);
89 assertTrue(val instanceof Number, "A number returned " + val);
90 assertEquals(((Number)val).intValue(), 42);
91 } catch (InvocationTargetException ex) {
92 throw ex.getTargetException();
96 @Test public void testExecuteScript() throws Throwable {
97 Method plus = methodClass.getMethod("plus", int.class, int.class);
99 assertEquals(plus.invoke(null, 10, 20), 30);
100 } catch (InvocationTargetException ex) {
101 throw ex.getTargetException();