Ant example source code file (ExecuteJavaTest.java)

This example Ant source code file (ExecuteJavaTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Ant tags/keywords

commandline, commandline, exception, exception, executejava, executejavatest, path, project, string, time_out, time_out*2, time_out*2, time_out_test, time_out_test

The ExecuteJavaTest.java source code

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package org.apache.tools.ant.taskdefs;

import org.apache.tools.ant.MagicNames;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.Path;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.taskdefs.condition.Os;
import org.apache.tools.ant.util.JavaEnvUtils;

import junit.framework.TestCase;

/**
 * Simple testcase for the ExecuteJava class - mostly stolen from
 * ExecuteWatchdogTest.
 *
 */
public class ExecuteJavaTest extends TestCase {

    private final static int TIME_OUT = 5000;

    private final static int CLOCK_ERROR=200;
    private final static int TIME_OUT_TEST=TIME_OUT-CLOCK_ERROR;

    private ExecuteJava ej;
    private Project project;
    private Path cp;

    public ExecuteJavaTest(String name) {
        super(name);
    }

    protected void setUp(){
        ej = new ExecuteJava();
        ej.setTimeout(new Long(TIME_OUT));
        project = new Project();
        project.setBasedir(".");
        project.setProperty(MagicNames.ANT_HOME, System.getProperty(MagicNames.ANT_HOME));
        cp = new Path(project, getTestClassPath());
        ej.setClasspath(cp);
    }

    private Commandline getCommandline(int timetorun) throws Exception {
        Commandline cmd = new Commandline();
        cmd.setExecutable(TimeProcess.class.getName());
        cmd.createArgument().setValue(String.valueOf(timetorun));
        return cmd;
    }

    public void testNoTimeOut() throws Exception {
        Commandline cmd = getCommandline(TIME_OUT/2);
        ej.setJavaCommand(cmd);
        ej.execute(project);
        assertTrue("process should not have been killed", !ej.killedProcess());
    }

    // test that the watchdog ends the process
    public void testTimeOut() throws Exception {
        Commandline cmd = getCommandline(TIME_OUT*2);
        ej.setJavaCommand(cmd);
        long now = System.currentTimeMillis();
        ej.execute(project);
        long elapsed = System.currentTimeMillis() - now;
        assertTrue("process should have been killed", ej.killedProcess());

        assertTrue("elapse time of "+elapsed
                   +" ms is less than timeout value of "+TIME_OUT_TEST+" ms",
                   elapsed >= TIME_OUT_TEST);
        assertTrue("elapse time of "+elapsed
                   +" ms is greater than run value of "+(TIME_OUT*2)+" ms",
                   elapsed < TIME_OUT*2);
    }


    public void testNoTimeOutForked() throws Exception {
        Commandline cmd = getCommandline(TIME_OUT/2);
        ej.setJavaCommand(cmd);
        ej.fork(cp);
        assertTrue("process should not have been killed", !ej.killedProcess());
    }

    // test that the watchdog ends the process
    public void testTimeOutForked() throws Exception {
        //process doesn't die properly under this combination,
        //thus test fails.  No workaround?
        if (JavaEnvUtils.isJavaVersion(JavaEnvUtils.JAVA_1_2)
            && Os.isFamily("dos")) {
            return;
        }
        Commandline cmd = getCommandline(TIME_OUT*2);
        ej.setJavaCommand(cmd);
        long now = System.currentTimeMillis();
        ej.fork(cp);
        long elapsed = System.currentTimeMillis() - now;
        assertTrue("process should have been killed", ej.killedProcess());

        assertTrue("elapse time of "+elapsed
                   +" ms is less than timeout value of "+TIME_OUT_TEST+" ms",
                   elapsed >= TIME_OUT_TEST);
        assertTrue("elapse time of "+elapsed
                   +" ms is greater than run value of "+(TIME_OUT*2)+" ms",
                   elapsed < TIME_OUT*2);
    }

    /**
     * Dangerous method to obtain the classpath for the test. This is
     * severely tighted to the build.xml properties.
     */
    private static String getTestClassPath(){
        String classpath = System.getProperty("build.tests");
        if (classpath == null) {
            System.err.println("WARNING: 'build.tests' property is not available !");
            classpath = System.getProperty("java.class.path");
        }

        return classpath;
    }

}