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.vm8;
20 import java.io.ByteArrayInputStream;
22 import java.io.FileWriter;
23 import java.io.IOException;
24 import java.io.InputStream;
26 import java.util.ArrayList;
27 import java.util.Arrays;
28 import java.util.Enumeration;
29 import java.util.HashSet;
30 import java.util.List;
32 import javax.script.Invocable;
33 import javax.script.ScriptContext;
34 import javax.script.ScriptEngine;
35 import javax.script.ScriptEngineManager;
36 import javax.script.ScriptException;
37 import org.apidesign.vm4brwsr.Bck2Brwsr;
38 import org.apidesign.vm4brwsr.ObfuscationLevel;
39 import static org.testng.Assert.*;
41 public final class TestVM {
42 private final Invocable code;
43 private final CharSequence codeSeq;
44 private final Object bck2brwsr;
45 private BytesLoader resources;
48 private TestVM(Invocable code, CharSequence codeSeq) throws ScriptException, NoSuchMethodException {
50 this.codeSeq = codeSeq;
51 this.bck2brwsr = ((ScriptEngine)code).eval("bck2brwsr(function(n) { return loader.get(n); })");
52 ((ScriptEngine)code).getContext().setAttribute("loader", this, ScriptContext.ENGINE_SCOPE);
55 public void register(BytesLoader res) {
59 public byte[] get(String res) throws IOException {
60 return resources != null ? resources.get(res) : null;
63 public Object execCode(
64 String msg, Class<?> clazz, String method,
65 Object expRes, Object... args
69 ret = code.invokeMethod(bck2brwsr, "loadClass", clazz.getName());
70 List<Object> ma = new ArrayList<>();
72 ma.addAll(Arrays.asList(args));
73 ret = code.invokeMethod(ret, "invoke", ma.toArray());
74 } catch (ScriptException ex) {
75 fail("Execution failed in " + dumpJS(codeSeq) + ": " + ex.getMessage(), ex);
76 } catch (NoSuchMethodException ex) {
77 fail("Cannot find method in " + dumpJS(codeSeq), ex);
79 if (ret == null && expRes == null) {
82 if (expRes != null && expRes.equals(ret)) {
85 if (expRes instanceof Number) {
86 // in case of Long it is necessary convert it to number
87 // since the Long is represented by two numbers in JavaScript
89 final Object toFP = ((ScriptEngine)code).eval("Number.prototype.toFP");
90 if (ret instanceof Long) {
91 ret = code.invokeMethod(toFP, "call", ret);
93 ret = code.invokeFunction("Number", ret);
94 } catch (ScriptException ex) {
95 fail("Conversion to number failed in " + dumpJS(codeSeq) + ": " + ex.getMessage(), ex);
96 } catch (NoSuchMethodException ex) {
97 fail("Cannot find global Number(x) function in " + dumpJS(codeSeq) + ": " + ex.getMessage(), ex);
104 String msg, Class clazz, String method, Object expRes, Object... args
106 Object ret = execCode(msg, clazz, method, expRes, args);
110 if (expRes instanceof Integer && ret instanceof Double) {
111 expRes = ((Integer)expRes).doubleValue();
113 if (expRes != null && expRes.equals(ret)) {
116 assertEquals(ret, expRes, msg + "was: " + ret + "\n" + dumpJS(codeSeq));
119 static TestVM compileClass(String... names) throws ScriptException, IOException {
120 return compileClass(null, names);
123 static TestVM compileClass(StringBuilder sb, String... names) throws ScriptException, IOException {
124 return compileClass(sb, null, names);
127 static TestVM compileClass(StringBuilder sb, ScriptEngine[] eng, String... names) throws ScriptException, IOException {
129 sb = new StringBuilder();
131 Bck2Brwsr.generate(sb, new EmulationResources(), names);
132 ScriptEngineManager sem = new ScriptEngineManager();
133 ScriptEngine js = sem.getEngineByExtension("js");
138 Object res = js.eval(sb.toString());
139 assertTrue(js instanceof Invocable, "It is invocable object: " + res);
140 return new TestVM((Invocable) js, sb);
141 } catch (Exception ex) {
142 if (sb.length() > 2000) {
145 fail("Could not evaluate:" + ex.getClass() + ":" + ex.getMessage() + "\n" + sb, ex);
150 static TestVM compileClassAsExtension(
151 StringBuilder sb, ScriptEngine[] eng,
152 String name, final String resourceName, final String resourceContent
153 ) throws ScriptException, IOException {
154 return compileClassesAsExtension(sb, eng, resourceName, resourceContent, name);
156 static TestVM compileClassesAsExtension(
157 StringBuilder sb, ScriptEngine[] eng,
158 final String resourceName, final String resourceContent, String... names
159 ) throws ScriptException, IOException {
161 sb = new StringBuilder();
163 if (eng[0] == null) {
164 ScriptEngineManager sem = new ScriptEngineManager();
165 ScriptEngine js = sem.getEngineByExtension("js");
167 Bck2Brwsr.generate(sb, new EmulationResources());
169 Set<String> exp = new HashSet<String>();
170 for (String n : names) {
171 int last = n.lastIndexOf('/');
172 exp.add(n.substring(0, last + 1));
174 Bck2Brwsr b2b = Bck2Brwsr.newCompiler().
175 resources(new EmulationResources() {
177 public InputStream get(String name) throws IOException {
178 if (name.equals(resourceName)) {
179 return new ByteArrayInputStream(resourceContent.getBytes("UTF-8"));
181 return super.get(name);
185 addResources("org/apidesign/vm4brwsr/obj.js").
186 addExported(exp.toArray(new String[0])).
187 obfuscation(ObfuscationLevel.FULL).
189 if (resourceName != null) {
190 b2b = b2b.addResources(resourceName);
195 Object res = eng[0].eval(sb.toString());
196 assertTrue(eng[0] instanceof Invocable, "It is invocable object: " + res);
197 return new TestVM((Invocable) eng[0], sb);
198 } catch (Exception ex) {
199 if (sb.length() > 2000) {
202 fail("Could not evaluate:" + ex.getClass() + ":" + ex.getMessage() + "\n" + sb, ex);
207 static TestVM compileClassAndResources(StringBuilder sb, ScriptEngine[] eng, String name, String... resources) throws ScriptException, IOException {
209 sb = new StringBuilder();
211 Bck2Brwsr b2b = Bck2Brwsr.newCompiler().
212 resources(new EmulationResources()).
213 addRootClasses(name).
214 addResources(resources);
216 ScriptEngineManager sem = new ScriptEngineManager();
217 ScriptEngine js = sem.getEngineByExtension("js");
224 Object res = js.eval(sb.toString());
225 assertTrue(js instanceof Invocable, "It is invocable object: " + res);
226 return new TestVM((Invocable) js, sb);
227 } catch (Exception ex) {
228 if (sb.length() > 2000) {
231 fail("Could not evaluate:" + ex.getClass() + ":" + ex.getMessage() + "\n" + sb, ex);
236 private static void defineAtoB(ScriptEngine js) throws ScriptException {
237 js.eval("atob = function(s) { return new String(org.apidesign.vm4brwsr.ResourcesTest.parseBase64Binary(s)); }");
240 // Object loadClass(String loadClass, String name) throws ScriptException, NoSuchMethodException {
241 // return code.invokeMethod(bck2brwsr, "loadClass", Exceptions.class.getName());
244 Object invokeMethod(Object obj, String method, Object... params) throws ScriptException, NoSuchMethodException {
245 return code.invokeMethod(obj, method, params);
248 Object invokeFunction(String methodName, Object... args) throws ScriptException, NoSuchMethodException {
249 return code.invokeFunction(methodName, args);
252 static StringBuilder dumpJS(CharSequence sb) throws IOException {
253 File f = File.createTempFile("execution", ".js");
254 FileWriter w = new FileWriter(f);
257 return new StringBuilder(f.getPath());
261 public String toString() {
263 return dumpJS(codeSeq).toString();
264 } catch (IOException ex) {
265 return ex.toString();
269 final CharSequence codeSeq() {
273 private static class EmulationResources implements Bck2Brwsr.Resources {
275 public InputStream get(String name) throws IOException {
276 if ("java/net/URI.class".equals(name)) {
280 if ("java/net/URLConnection.class".equals(name)) {
284 if ("java/lang/System.class".equals(name)) {
288 if ("java/io/PrintStream.class".equals(name)) {
292 if ("java/io/PrintWriter.class".equals(name)) {
296 Enumeration<URL> en = TestVM.class.getClassLoader().getResources(name);
298 while (en.hasMoreElements()) {
299 u = en.nextElement();
302 throw new IOException("Can't find " + name);
304 if (u.toExternalForm().contains("rt.jar!")) {
305 throw new IOException("No emulation for " + u);
307 return u.openStream();