| /* |
| * Copyright (C) 2016 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.documentsui.testing; |
| |
| import android.os.Handler; |
| import android.os.Looper; |
| import android.os.Message; |
| import android.os.SystemClock; |
| |
| import java.util.TimerTask; |
| |
| /** |
| * A test double of {@link Handler}, backed by {@link TestTimer}. |
| */ |
| public class TestHandler extends Handler { |
| private TestTimer mTimer = new TestTimer(); |
| |
| // Handler uses SystemClock.uptimeMillis() when scheduling task to get current time, but |
| // TestTimer has its own warped time for us to "fast forward" into the future. Therefore after |
| // we "fast forwarded" TestTimer once Handler may schedule tasks running in the "past" relative |
| // to the fast-forwarded TestTimer and cause problems. This value is used to track how much we |
| // fast-forward into the future to make sure we schedule tasks in the future of TestTimer as |
| // well. |
| private long mTimeDelta = 0; |
| |
| public TestHandler() { |
| // Use main looper to trick underlying handler, we're not using it at all. |
| super(Looper.getMainLooper()); |
| } |
| |
| public boolean hasScheduledMessage() { |
| return mTimer.hasScheduledTask(); |
| } |
| |
| public void dispatchNextMessage() { |
| mTimer.fastForwardToNextTask(); |
| |
| mTimeDelta = mTimer.getNow() - SystemClock.uptimeMillis(); |
| } |
| |
| public void dispatchAllScheduledMessages() { |
| while (hasScheduledMessage()) { |
| dispatchNextMessage(); |
| } |
| } |
| |
| public void dispatchAllMessages() { |
| while (hasScheduledMessage()) { |
| dispatchAllScheduledMessages(); |
| } |
| } |
| |
| @Override |
| public boolean sendMessageAtTime(Message msg, long uptimeMillis) { |
| msg.setTarget(this); |
| TimerTask task = new MessageTimerTask(msg); |
| mTimer.scheduleAtTime(new TestTimer.Task(task), uptimeMillis + mTimeDelta); |
| return true; |
| } |
| |
| private static class MessageTimerTask extends TimerTask { |
| private Message mMessage; |
| |
| private MessageTimerTask(Message message) { |
| mMessage = message; |
| } |
| |
| @Override |
| public void run() { |
| mMessage.getTarget().dispatchMessage(mMessage); |
| } |
| } |
| } |