/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed 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 com.android.unit_tests.os;
import com.google.android.collect.Lists;
import com.google.android.collect.Maps;
import android.os.FileObserver;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.LargeTest;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
public class FileObserverTest extends AndroidTestCase {
private Observer mObserver;
private File mTestFile;
private static class Observer extends FileObserver {
public List<Map> events = Lists.newArrayList();
public int totalEvents = 0;
public Observer(String path) {
super(path);
}
public void onEvent(int event, String path) {
synchronized (this) {
totalEvents++;
Map<String, Object> map = Maps.newHashMap();
map.put("event", event);
map.put("path", path);
events.add(map);
this.notifyAll();
}
}
}
@Override
protected void setUp() throws Exception {
mTestFile = File.createTempFile(".file_observer_test", ".txt");
}
@Override
protected void tearDown() throws Exception {
if (mTestFile != null && mTestFile.exists()) {
mTestFile.delete();
}
}
@LargeTest
public void testRun() throws Exception {
// make file changes and wait for them
assertTrue(mTestFile.exists());
assertNotNull(mTestFile.getParent());
mObserver = new Observer(mTestFile.getParent());
mObserver.startWatching();
FileOutputStream out = new FileOutputStream(mTestFile);
try {
out.write(0x20);
waitForEvent(); // open
waitForEvent(); // modify
mTestFile.delete();
waitForEvent(); // delete
mObserver.stopWatching();
// Ensure that we have seen at least 3 events.
assertTrue(mObserver.totalEvents > 3);
} finally {
out.close();
}
}
private void waitForEvent() {
synchronized (mObserver) {
boolean done = false;
while (!done) {
try {
mObserver.wait(2000);
done = true;
} catch (InterruptedException e) {
}
}
Iterator<Map> it = mObserver.events.iterator();
while (it.hasNext()) {
Map map = it.next();
Log.i("FileObserverTest", "event: " + map.get("event").toString() + " path: " + map.get("path"));
}
mObserver.events.clear();
}
}
}