Android example source code file (MessengerTest.java)

This example Android source code file (MessengerTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, androidtestcase, content, handler, ibinder, interruptedexception, mediumtest, message, messenger, messengertest, os, override, remoteexception, runtimeexception, serviceconnection, test, testhandlerthread, testthread

The MessengerTest.java Android example source code

/*
 * Copyright (C) 2007 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.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.RemoteException;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.Messenger;
import android.test.AndroidTestCase;
import android.test.suitebuilder.annotation.MediumTest;

public class MessengerTest extends AndroidTestCase {
    private Messenger mServiceMessenger;
    
    private ServiceConnection mConnection = new ServiceConnection() {
        public void onServiceConnected(ComponentName name, IBinder service) {
            synchronized (MessengerTest.this) {
                mServiceMessenger = new Messenger(service);
                MessengerTest.this.notifyAll();
            }
        }
        public void onServiceDisconnected(ComponentName name) {
            mServiceMessenger = null;
        }
    };
    
    private class TestThread extends TestHandlerThread {
        private Handler mTestHandler;
        private Messenger mTestMessenger;
        
        public void go() {
            synchronized (MessengerTest.this) {
                mTestHandler = new Handler() {
                    public void handleMessage(Message msg) {
                        TestThread.this.handleMessage(msg);
                    }
                };
                mTestMessenger = new Messenger(mTestHandler);
                TestThread.this.executeTest();
            }
        }

        public void executeTest() {
            Message msg = Message.obtain();
            msg.arg1 = 100;
            msg.arg2 = 1000;
            msg.replyTo = mTestMessenger;
            try {
                mServiceMessenger.send(msg);
            } catch (RemoteException e) {
            }
        }
        
        public void handleMessage(Message msg) {
            if (msg.arg1 != 100) {
                failure(new RuntimeException(
                        "Message.arg1 is not 100: " + msg.arg1));
                return;
            }
            if (msg.arg2 != 1000) {
                failure(new RuntimeException(
                        "Message.arg2 is not 1000: " + msg.arg2));
                return;
            }
            if (!mTestMessenger.equals(msg.replyTo)) {
                failure(new RuntimeException(
                        "Message.replyTo is not me: " + msg.replyTo));
                return;
            }
            success();
        }
    };
    
    @Override
    protected void setUp() throws Exception {
        super.setUp();
        getContext().bindService(new Intent(mContext, MessengerService.class),
                mConnection, Context.BIND_AUTO_CREATE);
        synchronized (this) {
            while (mServiceMessenger == null) {
                try {
                    wait();
                } catch (InterruptedException e) {
                }
            }
        }
    }

    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
        getContext().unbindService(mConnection);
    }

    @MediumTest
    public void testSend() {
        (new TestThread()).doTest(1000);
        
    }
}