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.vm4brwsr;
20 import java.io.ByteArrayInputStream;
22 import java.io.FileOutputStream;
23 import java.io.IOException;
24 import java.io.InputStream;
25 import java.io.OutputStreamWriter;
26 import java.io.Writer;
28 import java.util.ArrayList;
29 import java.util.Arrays;
30 import java.util.Enumeration;
31 import java.util.HashSet;
32 import java.util.List;
34 import javax.script.Invocable;
35 import javax.script.ScriptContext;
36 import javax.script.ScriptEngine;
37 import javax.script.ScriptEngineManager;
38 import javax.script.ScriptException;
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 {
128 return compileClass(sb, eng, new EmulationResources(), names);
130 static TestVM compileClass(
133 Bck2Brwsr.Resources resources,
135 ) throws ScriptException, IOException {
137 sb = new StringBuilder();
139 Bck2Brwsr.generate(sb, resources, names);
140 ScriptEngineManager sem = new ScriptEngineManager();
141 ScriptEngine js = sem.getEngineByExtension("js");
146 Object res = js.eval(sb.toString());
147 assertTrue(js instanceof Invocable, "It is invocable object: " + res);
148 return new TestVM((Invocable) js, sb);
149 } catch (Exception ex) {
150 if (sb.length() > 2000) {
153 fail("Could not evaluate:" + ex.getClass() + ":" + ex.getMessage() + "\n" + sb, ex);
158 static TestVM compileClassAsExtension(
159 StringBuilder sb, ScriptEngine[] eng,
160 String name, final String resourceName, final String resourceContent
161 ) throws ScriptException, IOException {
162 return compileClassesAsExtension(sb, eng, resourceName, resourceContent, name);
164 static TestVM compileClassesAsExtension(
165 StringBuilder sb, ScriptEngine[] eng,
166 final String resourceName, final String resourceContent, String... names
167 ) throws ScriptException, IOException {
169 sb = new StringBuilder();
171 if (eng[0] == null) {
172 ScriptEngineManager sem = new ScriptEngineManager();
173 ScriptEngine js = sem.getEngineByExtension("js");
175 Bck2Brwsr.newCompiler().resources(new EmulationResources())
176 .obfuscation(ObfuscationLevel.NONE).generate(sb);
178 Set<String> exp = new HashSet<String>();
179 for (String n : names) {
180 int last = n.lastIndexOf('/');
181 exp.add(n.substring(0, last + 1));
183 Bck2Brwsr b2b = Bck2Brwsr.newCompiler().
184 resources(new EmulationResources() {
186 public InputStream get(String name) throws IOException {
187 if (name.equals(resourceName)) {
188 return new ByteArrayInputStream(resourceContent.getBytes("UTF-8"));
190 return super.get(name);
194 addResources("org/apidesign/vm4brwsr/obj.js").
195 addExported(exp.toArray(new String[0])).
196 obfuscation(ObfuscationLevel.FULL).
198 if (resourceName != null) {
199 b2b = b2b.addResources(resourceName);
204 Object res = eng[0].eval(sb.toString());
205 assertTrue(eng[0] instanceof Invocable, "It is invocable object: " + res);
206 return new TestVM((Invocable) eng[0], sb);
207 } catch (Exception ex) {
208 if (sb.length() > 2000) {
211 fail("Could not evaluate:" + ex.getClass() + ":" + ex.getMessage() + "\n" + sb, ex);
216 static TestVM compileClassAndResources(StringBuilder sb, ScriptEngine[] eng, String name, String... resources) throws ScriptException, IOException {
218 sb = new StringBuilder();
220 Bck2Brwsr b2b = Bck2Brwsr.newCompiler().
221 resources(new EmulationResources()).
222 addRootClasses(name).
223 addResources(resources);
225 ScriptEngineManager sem = new ScriptEngineManager();
226 ScriptEngine js = sem.getEngineByExtension("js");
233 Object res = js.eval(sb.toString());
234 assertTrue(js instanceof Invocable, "It is invocable object: " + res);
235 return new TestVM((Invocable) js, sb);
236 } catch (Exception ex) {
237 if (sb.length() > 2000) {
240 fail("Could not evaluate:" + ex.getClass() + ":" + ex.getMessage() + "\n" + sb, ex);
245 private static void defineAtoB(ScriptEngine js) throws ScriptException {
246 js.eval("atob = function(s) { return new String(org.apidesign.vm4brwsr.ResourcesTest.parseBase64Binary(s)); }");
249 Object loadClass(String loadClass, String name) throws ScriptException, NoSuchMethodException {
250 return code.invokeMethod(bck2brwsr, "loadClass", Exceptions.class.getName());
253 Object invokeMethod(Object obj, String method, Object... params) throws ScriptException, NoSuchMethodException {
254 return code.invokeMethod(obj, method, params);
257 Object invokeFunction(String methodName, Object... args) throws ScriptException, NoSuchMethodException {
258 return code.invokeFunction(methodName, args);
261 static StringBuilder dumpJS(CharSequence sb) throws IOException {
262 File f = File.createTempFile("execution", ".js");
263 Writer w = new OutputStreamWriter(new FileOutputStream(f), "UTF-8");
266 return new StringBuilder(f.getPath());
270 public String toString() {
272 return dumpJS(codeSeq).toString();
273 } catch (IOException ex) {
274 return ex.toString();
278 final CharSequence codeSeq() {
282 private static class EmulationResources implements Bck2Brwsr.Resources {
284 public InputStream get(String name) throws IOException {
285 if ("java/net/URI.class".equals(name)) {
289 if ("java/net/URLConnection.class".equals(name)) {
293 if ("java/lang/System.class".equals(name)) {
297 Enumeration<URL> en = StaticMethodTest.class.getClassLoader().getResources(name);
299 while (en.hasMoreElements()) {
300 u = en.nextElement();
303 throw new IOException("Can't find " + name);
305 if (u.toExternalForm().contains("rt.jar!")) {
306 throw new IOException("No emulation for " + u);
308 return u.openStream();