1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/vm/src/test/java/org/apidesign/vm4brwsr/CompareVMs.java Thu Dec 06 16:13:03 2012 +0100
1.3 @@ -0,0 +1,147 @@
1.4 +/**
1.5 + * Back 2 Browser Bytecode Translator
1.6 + * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
1.7 + *
1.8 + * This program is free software: you can redistribute it and/or modify
1.9 + * it under the terms of the GNU General Public License as published by
1.10 + * the Free Software Foundation, version 2 of the License.
1.11 + *
1.12 + * This program is distributed in the hope that it will be useful,
1.13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.15 + * GNU General Public License for more details.
1.16 + *
1.17 + * You should have received a copy of the GNU General Public License
1.18 + * along with this program. Look for COPYING file in the top folder.
1.19 + * If not, see http://opensource.org/licenses/GPL-2.0.
1.20 + */
1.21 +package org.apidesign.vm4brwsr;
1.22 +
1.23 +import java.lang.reflect.Method;
1.24 +import javax.script.Invocable;
1.25 +import javax.script.ScriptEngine;
1.26 +import javax.script.ScriptEngineManager;
1.27 +import org.testng.Assert;
1.28 +import org.testng.ITest;
1.29 +import org.testng.annotations.Factory;
1.30 +import org.testng.annotations.Test;
1.31 +
1.32 +/** A TestNG {@link Factory} that seeks for {@link Compare} annotations
1.33 + * in provided class and builds set of tests that compare the computations
1.34 + * in real as well as JavaScript virtual machines. Use as:<pre>
1.35 + * {@code @}{@link Factory} public static create() {
1.36 + * return @{link CompareVMs}.{@link #create(YourClass.class);
1.37 + * }</pre>
1.38 + *
1.39 + * @author Jaroslav Tulach <jtulach@netbeans.org>
1.40 + */
1.41 +public final class CompareVMs implements ITest {
1.42 + private final Method m;
1.43 + private final boolean js;
1.44 + private final CompareVMs first, second;
1.45 + private Object value;
1.46 + private static Invocable code;
1.47 + private static CharSequence codeSeq;
1.48 +
1.49 + private CompareVMs(Method m, boolean js) {
1.50 + this.m = m;
1.51 + this.js = js;
1.52 + this.first = null;
1.53 + this.second = null;
1.54 + }
1.55 +
1.56 + private CompareVMs(Method m, CompareVMs first, CompareVMs second) {
1.57 + this.first = first;
1.58 + this.second = second;
1.59 + this.m = m;
1.60 + this.js = false;
1.61 + }
1.62 +
1.63 + private static void compileTheCode(Class<?> clazz) throws Exception {
1.64 + if (code != null) {
1.65 + return;
1.66 + }
1.67 + StringBuilder sb = new StringBuilder();
1.68 + class SkipMe extends GenJS {
1.69 + public SkipMe(Appendable out) {
1.70 + super(out);
1.71 + }
1.72 +
1.73 + @Override
1.74 + protected boolean requireReference(String cn) {
1.75 + if (cn.contains("CompareVMs")) {
1.76 + return true;
1.77 + }
1.78 + return super.requireReference(cn);
1.79 + }
1.80 +
1.81 +
1.82 + }
1.83 + SkipMe sm = new SkipMe(sb);
1.84 + sm.doCompile(CompareVMs.class.getClassLoader(), StringArray.asList(
1.85 + clazz.getName().replace('.', '/')
1.86 + ));
1.87 +
1.88 + ScriptEngineManager sem = new ScriptEngineManager();
1.89 + ScriptEngine js = sem.getEngineByExtension("js");
1.90 +
1.91 + Object res = js.eval(sb.toString());
1.92 + Assert.assertTrue(js instanceof Invocable, "It is invocable object: " + res);
1.93 + code = (Invocable)js;
1.94 + codeSeq = sb;
1.95 + }
1.96 +
1.97 +
1.98 + public static Object[] create(Class<?> clazz) {
1.99 + Method[] arr = clazz.getMethods();
1.100 + Object[] ret = new Object[3 * arr.length];
1.101 + int cnt = 0;
1.102 + for (Method m : arr) {
1.103 + Compare c = m.getAnnotation(Compare.class);
1.104 + if (c == null) {
1.105 + continue;
1.106 + }
1.107 + final CompareVMs real = new CompareVMs(m, false);
1.108 + final CompareVMs js = new CompareVMs(m, true);
1.109 + ret[cnt++] = real;
1.110 + ret[cnt++] = js;
1.111 + ret[cnt++] = new CompareVMs(m, real, js);
1.112 + }
1.113 + Object[] r = new Object[cnt];
1.114 + for (int i = 0; i < cnt; i++) {
1.115 + r[i] = ret[i];
1.116 + }
1.117 + return r;
1.118 + }
1.119 +
1.120 + @Test public void runTest() throws Throwable {
1.121 + if (first != null) {
1.122 + Object v1 = first.value;
1.123 + Object v2 = second.value;
1.124 + if (v1 instanceof Number) {
1.125 + v1 = ((Number)v1).doubleValue();
1.126 + }
1.127 + Assert.assertEquals(v1, v2, "Comparing results");
1.128 + } else {
1.129 + if (js) {
1.130 + try {
1.131 + compileTheCode(m.getDeclaringClass());
1.132 + Object inst = code.invokeFunction(m.getDeclaringClass().getName().replace('.', '_'), false);
1.133 + value = code.invokeMethod(inst, m.getName() + "__I");
1.134 + } catch (Exception ex) {
1.135 + throw new AssertionError(StaticMethodTest.dumpJS(codeSeq)).initCause(ex);
1.136 + }
1.137 + } else {
1.138 + value = m.invoke(m.getDeclaringClass().newInstance());
1.139 + }
1.140 + }
1.141 + }
1.142 +
1.143 + @Override
1.144 + public String getTestName() {
1.145 + if (first != null) {
1.146 + return m.getName() + "[Compare]";
1.147 + }
1.148 + return m.getName() + (js ? "[JavaScript]" : "[Java]");
1.149 + }
1.150 +}