content: /*
   * Copyright (C) 2018 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.server.backup.encryption.chunking;
  
  import static com.google.common.truth.Truth.assertThat;
  
  import static org.mockito.Mockito.atLeastOnce;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.verify;
  
  import android.platform.test.annotations.Presubmit;
  
  import com.google.common.primitives.Bytes;
  
  import org.junit.Before;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.mockito.ArgumentCaptor;
  import org.mockito.Captor;
  import org.mockito.Mock;
  import org.robolectric.RobolectricTestRunner;
  
  import java.io.IOException;
  
  /** Tests for {@link DiffScriptBackupWriter}. */
  @RunWith(RobolectricTestRunner.class)
  @Presubmit
  public class DiffScriptBackupWriterTest {
      private static final byte[] TEST_BYTES = {1, 2, 3, 4, 5, 6, 7, 8, 9};
  
      @Captor private ArgumentCaptor<Byte> mBytesCaptor;
      @Mock private SingleStreamDiffScriptWriter mDiffScriptWriter;
      private BackupWriter mBackupWriter;
  
      @Before
      public void setUp() {
          mDiffScriptWriter = mock(SingleStreamDiffScriptWriter.class);
          mBackupWriter = new DiffScriptBackupWriter(mDiffScriptWriter);
          mBytesCaptor = ArgumentCaptor.forClass(Byte.class);
      }
  
      @Test
      public void writeBytes_writesBytesToWriter() throws Exception {
          mBackupWriter.writeBytes(TEST_BYTES);
  
          verify(mDiffScriptWriter, atLeastOnce()).writeByte(mBytesCaptor.capture());
          assertThat(mBytesCaptor.getAllValues())
                  .containsExactlyElementsIn(Bytes.asList(TEST_BYTES))
                  .inOrder();
      }
  
      @Test
      public void writeChunk_writesChunkToWriter() throws Exception {
          mBackupWriter.writeChunk(0, 10);
  
          verify(mDiffScriptWriter).writeChunk(0, 10);
      }
  
      @Test
      public void getBytesWritten_returnsTotalSum() throws Exception {
          mBackupWriter.writeBytes(TEST_BYTES);
          mBackupWriter.writeBytes(TEST_BYTES);
          mBackupWriter.writeChunk(/*start=*/ 0, /*length=*/ 10);
  
          long bytesWritten = mBackupWriter.getBytesWritten();
  
          assertThat(bytesWritten).isEqualTo(2 * TEST_BYTES.length + 10);
      }
  
      @Test
      public void flush_flushesWriter() throws IOException {
          mBackupWriter.flush();
  
          verify(mDiffScriptWriter).flush();
      }
  }
  