tests/tests/media/src/android/media/cts/MediaScannerNotificationTest.java

/*
 * Copyright (C) 2011 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.media.cts;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.net.Uri;
import android.os.Environment;
import android.test.AndroidTestCase;

import java.io.File;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

public class MediaScannerNotificationTest extends AndroidTestCase {

    public void testMediaScannerNotification() throws Exception {
        ScannerNotificationReceiver startedReceiver = new ScannerNotificationReceiver(
                Intent.ACTION_MEDIA_SCANNER_STARTED);
        ScannerNotificationReceiver finishedReceiver = new ScannerNotificationReceiver(
                Intent.ACTION_MEDIA_SCANNER_FINISHED);

        IntentFilter startedIntentFilter = new IntentFilter(Intent.ACTION_MEDIA_SCANNER_STARTED);
        startedIntentFilter.addDataScheme("file");
        IntentFilter finshedIntentFilter = new IntentFilter(Intent.ACTION_MEDIA_SCANNER_FINISHED);
        finshedIntentFilter.addDataScheme("file");

        mContext.registerReceiver(startedReceiver, startedIntentFilter);
        mContext.registerReceiver(finishedReceiver, finshedIntentFilter);

        mContext.sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED, Uri.parse("file://"
                + Environment.getExternalStorageDirectory())));

        startedReceiver.waitForBroadcast();
        finishedReceiver.waitForBroadcast();
    }

    static class ScannerNotificationReceiver extends BroadcastReceiver {

        private static final int TIMEOUT_MS = 4 * 60 * 1000;

        private final String mAction;
        private final CountDownLatch mLatch = new CountDownLatch(1);

        ScannerNotificationReceiver(String action) {
            mAction = action;
        }

        @Override
        public void onReceive(Context context, Intent intent) {
            if (intent.getAction().equals(mAction)) {
                mLatch.countDown();
            }
        }

        public void waitForBroadcast() throws InterruptedException {
            if (!mLatch.await(TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
                int numFiles = countFiles(Environment.getExternalStorageDirectory());
                fail("Failed to receive broadcast in " + TIMEOUT_MS + "ms for " + mAction
                        + " while trying to scan " + numFiles + " files!");
            }
        }

        private int countFiles(File dir) {
            int count = 0;
            File[] files = dir.listFiles();
            if (files != null) {
                for (File file : files) {
                    if (file.isDirectory()) {
                        count += countFiles(file);
                    } else {
                        count++;
                    }
                }
            }
            return count;
        }
    }
}