| /* |
| * Copyright (C) 2017 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.server.wallpaper; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import android.app.WallpaperColors; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.os.SystemClock; |
| import android.service.wallpaper.WallpaperService; |
| import android.support.test.annotation.UiThreadTest; |
| import android.support.test.filters.SmallTest; |
| import android.support.test.runner.AndroidJUnit4; |
| |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| |
| import java.util.concurrent.CountDownLatch; |
| import java.util.function.Supplier; |
| |
| @SmallTest |
| @RunWith(AndroidJUnit4.class) |
| public class WallpaperServiceTests { |
| |
| @UiThreadTest |
| @Test |
| public void testNotifyColorsChanged_rateLimit() throws Exception { |
| long[] clockOffset = {0}; |
| boolean[] postDelayed = {false}; |
| Supplier<Long> clockFunction = () -> SystemClock.elapsedRealtime() + clockOffset[0]; |
| Handler handler = new Handler() { |
| @Override |
| public boolean sendMessageAtTime(Message msg, long uptimeMillis) { |
| postDelayed[0] = true; |
| return super.sendMessageAtTime(msg, uptimeMillis); |
| } |
| }; |
| |
| CountDownLatch eventCountdown = new CountDownLatch(2); |
| WallpaperService service = new WallpaperService() { |
| @Override |
| public Engine onCreateEngine() { |
| return new WallpaperService.Engine(clockFunction, handler) { |
| @Override |
| public WallpaperColors onComputeColors() { |
| eventCountdown.countDown(); |
| return null; |
| } |
| }; |
| } |
| }; |
| WallpaperService.Engine engine = service.onCreateEngine(); |
| |
| // Called because it's the first time. |
| engine.notifyColorsChanged(); |
| assertEquals("OnComputeColors should have been called.", |
| 1, eventCountdown.getCount()); |
| |
| // Ignored since the call should be throttled. |
| engine.notifyColorsChanged(); |
| assertEquals("OnComputeColors should have been throttled.", |
| 1, eventCountdown.getCount()); |
| // Should have been posted to the handler. |
| assertTrue("Event should have been delayed", postDelayed[0]); |
| |
| // Called again after being deferred. |
| clockOffset[0] = 1500; |
| engine.notifyColorsChanged(); |
| assertEquals("OnComputeColors should have been deferred.", |
| 0, eventCountdown.getCount()); |
| } |
| } |