| /* |
| * Copyright (C) 2010 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.quicksearchbox.util; |
| |
| import java.util.LinkedList; |
| import java.util.concurrent.Executor; |
| |
| /** |
| * A simple executor that maintains a queue and executes one task synchronously every |
| * time {@link #runNext()} is called. This gives us predictable scheduling for the tests to |
| * avoid timeouts waiting for threads to finish. |
| */ |
| public class MockExecutor implements Executor { |
| |
| private final LinkedList<Runnable> mQueue = new LinkedList<Runnable>(); |
| |
| private boolean mClosed = false; |
| |
| public void execute(Runnable task) { |
| if (mClosed) throw new IllegalStateException("closed"); |
| mQueue.addLast(task); |
| } |
| |
| public void cancelPendingTasks() { |
| mQueue.clear(); |
| } |
| |
| public void close() { |
| cancelPendingTasks(); |
| mClosed = true; |
| } |
| |
| public int countPendingTasks() { |
| return mQueue.size(); |
| } |
| |
| public boolean runNext() { |
| if (mQueue.isEmpty()) { |
| return false; |
| } |
| Runnable command = mQueue.removeFirst(); |
| command.run(); |
| return true; |
| } |
| |
| } |