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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License
     15  */
     16 
     17 package android.cts.backup.fullbackuponlyapp;
     18 
     19 import static android.support.test.InstrumentationRegistry.getTargetContext;
     20 
     21 import static org.junit.Assert.assertFalse;
     22 import static org.junit.Assert.assertTrue;
     23 
     24 import android.content.Context;
     25 import android.support.test.runner.AndroidJUnit4;
     26 import android.util.Log;
     27 
     28 import org.junit.Before;
     29 import org.junit.Test;
     30 import org.junit.runner.RunWith;
     31 
     32 import java.io.BufferedOutputStream;
     33 import java.io.File;
     34 import java.io.FileOutputStream;
     35 import java.io.IOException;
     36 import java.util.Random;
     37 
     38 /**
     39  * Device side routines to be invoked by the host side FullBackupOnlyHostSideTest. These
     40  * are not designed to be called in any other way, as they rely on state set up by the host side
     41  * test.
     42  */
     43 @RunWith(AndroidJUnit4.class)
     44 public class FullBackupOnlyTest {
     45     private static final String TAG = "FullBackupOnlyTest";
     46 
     47     private static final int FILE_SIZE_BYTES = 1024 * 1024;
     48 
     49     private File mKeyValueBackupFile;
     50     private File mDoBackupFile;
     51     private File mDoBackupFile2;
     52 
     53     private Context mContext;
     54 
     55     @Before
     56     public void setUp() {
     57         Log.i(TAG, "set up");
     58         mContext = getTargetContext();
     59         setupFiles();
     60     }
     61 
     62     private void setupFiles() {
     63         mKeyValueBackupFile = getKeyValueBackupFile(mContext);
     64 
     65         // Files to be backed up with Dolly
     66         File filesDir = mContext.getFilesDir();
     67         File normalFolder = new File(filesDir, "normal_folder");
     68 
     69         mDoBackupFile = new File(filesDir, "file_to_backup");
     70         mDoBackupFile2 = new File(normalFolder, "file_to_backup2");
     71     }
     72 
     73     @Test
     74     public void createFiles() throws Exception {
     75         // Make sure the data does not exist from before
     76         deleteAllFiles();
     77         assertNoFilesExist();
     78 
     79         // Create test data
     80         generateFiles();
     81         assertAllFilesExist();
     82 
     83         Log.d(TAG, "Test files created: \n"
     84                 + mKeyValueBackupFile.getAbsolutePath() + "\n"
     85                 + mDoBackupFile.getAbsolutePath() + "\n"
     86                 + mDoBackupFile2.getAbsolutePath());
     87     }
     88 
     89     @Test
     90     public void checkKeyValueFileDoesntExist() throws Exception {
     91         assertKeyValueFileDoesntExist();
     92     }
     93 
     94     @Test
     95     public void checkKeyValueFileExists() throws Exception {
     96         assertKeyValueFileExists();
     97     }
     98 
     99     @Test
    100     public void checkDollyFilesExist() throws Exception {
    101         assertDollyFilesExist();
    102     }
    103 
    104     @Test
    105     public void checkDollyFilesDontExist() throws Exception {
    106         assertDollyFilesDontExist();
    107     }
    108 
    109     protected static File getKeyValueBackupFile(Context context) {
    110         // Files in the 'no_backup' directory are not backed up with Dolly.
    111         // We're going to use it to store a file the contents of which are backed up via key/value.
    112         File noBackupDir = context.getNoBackupFilesDir();
    113         return new File(noBackupDir, "key_value_backup_file");
    114     }
    115 
    116     private void generateFiles() {
    117         try {
    118             // Add data to all the files we created
    119             addData(mKeyValueBackupFile);
    120             addData(mDoBackupFile);
    121             addData(mDoBackupFile2);
    122             Log.d(TAG, "Files generated!");
    123         } catch (IOException e) {
    124             Log.e(TAG, "Unable to generate files", e);
    125         }
    126     }
    127 
    128     private void deleteAllFiles() {
    129         mKeyValueBackupFile.delete();
    130         mDoBackupFile.delete();
    131         mDoBackupFile2.delete();
    132         Log.d(TAG, "Files deleted!");
    133     }
    134 
    135     private void addData(File file) throws IOException {
    136         file.getParentFile().mkdirs();
    137         byte[] bytes = new byte[FILE_SIZE_BYTES];
    138         new Random().nextBytes(bytes);
    139 
    140         try (BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file))) {
    141             bos.write(bytes, 0, bytes.length);
    142         }
    143     }
    144 
    145     private void assertAllFilesExist() {
    146         assertKeyValueFileExists();
    147         assertDollyFilesExist();
    148     }
    149 
    150     private void assertNoFilesExist() {
    151         assertKeyValueFileDoesntExist();
    152         assertDollyFilesDontExist();
    153     }
    154 
    155     private void assertKeyValueFileExists() {
    156         assertTrue("Key/value file did not exist!", mKeyValueBackupFile.exists());
    157     }
    158 
    159     private void assertKeyValueFileDoesntExist() {
    160         assertFalse("Key/value file did exist!", mKeyValueBackupFile.exists());
    161     }
    162 
    163     private void assertDollyFilesExist() {
    164         assertTrue("File in 'files' did not exist!", mDoBackupFile.exists());
    165         assertTrue("File in folder inside 'files' did not exist!", mDoBackupFile2.exists());
    166     }
    167 
    168     private void assertDollyFilesDontExist() {
    169         assertFalse("File in 'files' did exist!", mDoBackupFile.exists());
    170         assertFalse("File in folder inside 'files' did exist!", mDoBackupFile2.exists());
    171     }
    172 }
    173