jaroslav@273: /**
jaroslav@273:  * Back 2 Browser Bytecode Translator
jaroslav@273:  * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>
jaroslav@273:  *
jaroslav@273:  * This program is free software: you can redistribute it and/or modify
jaroslav@273:  * it under the terms of the GNU General Public License as published by
jaroslav@273:  * the Free Software Foundation, version 2 of the License.
jaroslav@273:  *
jaroslav@273:  * This program is distributed in the hope that it will be useful,
jaroslav@273:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
jaroslav@273:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
jaroslav@273:  * GNU General Public License for more details.
jaroslav@273:  *
jaroslav@273:  * You should have received a copy of the GNU General Public License
jaroslav@273:  * along with this program. Look for COPYING file in the top folder.
jaroslav@273:  * If not, see http://opensource.org/licenses/GPL-2.0.
jaroslav@273:  */
jaroslav@372: package org.apidesign.bck2brwsr.vmtest.impl;
jaroslav@273: 
jaroslav@372: import org.apidesign.bck2brwsr.vmtest.*;
jaroslav@346: import java.io.File;
jaroslav@346: import java.io.FileWriter;
jaroslav@346: import java.io.IOException;
jaroslav@273: import java.lang.reflect.Method;
jaroslav@372: import java.util.ArrayList;
jaroslav@372: import java.util.List;
jaroslav@273: import org.testng.Assert;
jaroslav@273: import org.testng.ITest;
jaroslav@273: import org.testng.annotations.Factory;
jaroslav@273: import org.testng.annotations.Test;
jaroslav@273: 
jaroslav@273: /** A TestNG {@link Factory} that seeks for {@link Compare} annotations
jaroslav@273:  * in provided class and builds set of tests that compare the computations
jaroslav@273:  * in real as well as JavaScript virtual machines. Use as:<pre>
jaroslav@273:  * {@code @}{@link Factory} public static create() {
jaroslav@346:  *   return @{link VMTest}.{@link #create(YourClass.class);
jaroslav@273:  * }</pre>
jaroslav@273:  *
jaroslav@273:  * @author Jaroslav Tulach <jtulach@netbeans.org>
jaroslav@273:  */
jaroslav@372: public final class CompareCase implements ITest {
jaroslav@372:     private final Bck2BrwsrCase first, second;
jaroslav@273:     private final Method m;
jaroslav@273:     
jaroslav@372:     private CompareCase(Method m, Bck2BrwsrCase first, Bck2BrwsrCase second) {
jaroslav@273:         this.first = first;
jaroslav@273:         this.second = second;
jaroslav@273:         this.m = m;
jaroslav@273:     }
jaroslav@273: 
jaroslav@346:     /** Inspects <code>clazz</code> and for each {@lik Compare} method creates
jaroslav@347:      * instances of tests. Each instance runs the test in different virtual
jaroslav@346:      * machine and at the end they compare the results.
jaroslav@346:      * 
jaroslav@346:      * @param clazz the class to inspect
jaroslav@346:      * @return the set of created tests
jaroslav@346:      */
jaroslav@273:     public static Object[] create(Class<?> clazz) {
jaroslav@273:         Method[] arr = clazz.getMethods();
jaroslav@372:         List<Object> ret = new ArrayList<>();
jaroslav@372:         
jaroslav@372:         final Launchers l = Launchers.INSTANCE;
jaroslav@372:     
jaroslav@372:         ret.add(l);
jaroslav@372:         
jaroslav@273:         for (Method m : arr) {
jaroslav@273:             Compare c = m.getAnnotation(Compare.class);
jaroslav@273:             if (c == null) {
jaroslav@273:                 continue;
jaroslav@273:             }
jaroslav@372:             final Bck2BrwsrCase real = new Bck2BrwsrCase(m, 0, null);
jaroslav@372:             final Bck2BrwsrCase js = new Bck2BrwsrCase(m, 1, l);
jaroslav@372:             final Bck2BrwsrCase brwsr = new Bck2BrwsrCase(m, 2, l);
jaroslav@372:             
jaroslav@372:             ret.add(real);
jaroslav@372:             ret.add(js);
jaroslav@372:             ret.add(brwsr);
jaroslav@372:             
jaroslav@372:             ret.add(new CompareCase(m, real, js));
jaroslav@372:             ret.add(new CompareCase(m, real, brwsr));
jaroslav@273:         }
jaroslav@372:         return ret.toArray();
jaroslav@273:     }
jaroslav@346: 
jaroslav@346:     /** Test that compares the previous results.
jaroslav@346:      * @throws Throwable 
jaroslav@346:      */
jaroslav@280:     @Test(dependsOnGroups = "run") public void compareResults() throws Throwable {
jaroslav@280:         Object v1 = first.value;
jaroslav@280:         Object v2 = second.value;
jaroslav@356:         if (v1 != null) {
jaroslav@356:             v1 = v1.toString();
jaroslav@356:         } else {
jaroslav@356:             v1 = "null";
jaroslav@280:         }
jaroslav@296:         Assert.assertEquals(v2, v1, "Comparing results");
jaroslav@280:     }
jaroslav@280:     
jaroslav@346:     /** Test name.
jaroslav@346:      * @return name of the tested method followed by a suffix
jaroslav@346:      */
jaroslav@280:     @Override
jaroslav@280:     public String getTestName() {
jaroslav@349:         return m.getName() + "[Compare " + second.typeName() + "]";
jaroslav@280:     }
jaroslav@346:     
jaroslav@346:     static StringBuilder dumpJS(CharSequence sb) throws IOException {
jaroslav@346:         File f = File.createTempFile("execution", ".js");
jaroslav@347:         try (FileWriter w = new FileWriter(f)) {
jaroslav@347:             w.append(sb);
jaroslav@347:         }
jaroslav@346:         return new StringBuilder(f.getPath());
jaroslav@346:     }
jaroslav@273: }