| /* |
| * 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 android.os; |
| |
| import android.test.AndroidTestCase; |
| import android.util.Log; |
| |
| import androidx.test.filters.MediumTest; |
| |
| import com.google.android.collect.Lists; |
| import com.google.android.collect.Maps; |
| |
| 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(); |
| } |
| } |
| |
| @MediumTest |
| 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(); // modify |
| 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: " + getEventString((Integer)map.get("event")) + " path: " + map.get("path")); |
| } |
| |
| mObserver.events.clear(); |
| } |
| } |
| |
| private String getEventString(int event) { |
| switch (event) { |
| case FileObserver.ACCESS: |
| return "ACCESS"; |
| case FileObserver.MODIFY: |
| return "MODIFY"; |
| case FileObserver.ATTRIB: |
| return "ATTRIB"; |
| case FileObserver.CLOSE_WRITE: |
| return "CLOSE_WRITE"; |
| case FileObserver.CLOSE_NOWRITE: |
| return "CLOSE_NOWRITE"; |
| case FileObserver.OPEN: |
| return "OPEN"; |
| case FileObserver.MOVED_FROM: |
| return "MOVED_FROM"; |
| case FileObserver.MOVED_TO: |
| return "MOVED_TO"; |
| case FileObserver.CREATE: |
| return "CREATE"; |
| case FileObserver.DELETE: |
| return "DELETE"; |
| case FileObserver.DELETE_SELF: |
| return "DELETE_SELF"; |
| case FileObserver.MOVE_SELF: |
| return "MOVE_SELF"; |
| default: |
| return "UNKNOWN"; |
| } |
| } |
| } |