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/*
* 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 java.io.BufferedReader;
import java.io.InputStreamReader;
import org.apache.tools.ant.util.JavaEnvUtils;
import org.junit.Before;
import org.junit.Test;
import org.junit.internal.AssumptionViolatedException;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
/**
* Simple testcase for the ExecuteWatchdog class.
*
*/
public class ExecuteWatchdogTest {
private final static long TIME_OUT = 5000;
private final static String TEST_CLASSPATH = getTestClassPath();
private final static int CLOCK_ERROR=200;
private final static long TIME_OUT_TEST=TIME_OUT-CLOCK_ERROR;
private ExecuteWatchdog watchdog;
@Before
public void setUp(){
watchdog = new ExecuteWatchdog(TIME_OUT);
}
/**
* Dangerous method to obtain the classpath for the test. This is
* severely tied 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;
}
private Process getProcess(long timetorun) throws Exception {
String[] cmdArray = {
JavaEnvUtils.getJreExecutable("java"), "-classpath", TEST_CLASSPATH,
TimeProcess.class.getName(), String.valueOf(timetorun)
};
//System.out.println("Testing with classpath: " + System.getProperty("java.class.path"));
return Runtime.getRuntime().exec(cmdArray);
}
private String getErrorOutput(Process p) throws Exception {
BufferedReader err = new BufferedReader( new InputStreamReader(p.getErrorStream()) );
StringBuffer buf = new StringBuffer();
String line;
while ( (line = err.readLine()) != null){
buf.append(line);
}
return buf.toString();
}
private int waitForEnd(Process p) throws Exception {
int retcode = p.waitFor();
if (retcode != 0){
String err = getErrorOutput(p);
if (err.length() > 0){
System.err.println("ERROR:");
System.err.println(err);
}
}
return retcode;
}
@Test
public void testNoTimeOut() throws Exception {
Process process = getProcess(TIME_OUT/2);
watchdog.start(process);
int retCode = waitForEnd(process);
assertTrue("process should not have been killed", !watchdog.killedProcess());
assertFalse(Execute.isFailure(retCode));
}
// test that the watchdog ends the process
@Test
public void testTimeOut() throws Exception {
Process process = getProcess(TIME_OUT*2);
long now = System.currentTimeMillis();
watchdog.start(process);
int retCode = process.waitFor();
long elapsed = System.currentTimeMillis() - now;
assertTrue("process should have been killed", watchdog.killedProcess());
// assertTrue("return code is invalid: " + retCode, retCode!=0);
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);
}
// test a process that runs and failed
@Test
public void testFailed() throws Exception {
Process process = getProcess(-1); // process should abort
watchdog.start(process);
int retCode = process.waitFor();
assertTrue("process should not have been killed", !watchdog.killedProcess());
assertTrue("return code is invalid: " + retCode, retCode!=0);
}
@Test
public void testManualStop() throws Exception {
final Process process = getProcess(TIME_OUT*2);
watchdog.start(process);
// I assume that starting this takes less than TIME_OUT/2 ms...
Thread thread = new Thread(){
public void run(){
try {
process.waitFor();
} catch(InterruptedException e){
// not very nice but will do the job
throw new AssumptionViolatedException("process interrupted in thread", e);
}
}
};
thread.start();
// wait for TIME_OUT/2, there should be about TIME_OUT/2 ms remaining before timeout
thread.join(TIME_OUT/2);
// now stop the watchdog.
watchdog.stop();
// wait for the thread to die, should be the end of the process
thread.join();
// process should be dead and well finished
assertEquals(0, process.exitValue());
assertTrue("process should not have been killed", !watchdog.killedProcess());
}
}
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