} finally {
      out.close();
    }

    assertContainsExpectedBytes();
  }

  public void testOpenBufferedStream() throws IOException {
    OutputStream out = sink.openBufferedStream();
    try {
      ByteStreams.copy(new ByteArrayInputStream(data), out);
    } finally {
      out.close();
    }

    assertContainsExpectedBytes();
  }