assertArrayEquals(new byte[0], sink.getBytes());
    sink.write(bytes);

    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
    assertArrayEquals(bytes, sink.getBytes());
  }

  public void testWriteFrom_inputStream() throws IOException {
    ByteArrayInputStream in = new ByteArrayInputStream(bytes);
    sink.writeFrom(in);

    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());

    assertArrayEquals(new byte[0], sink.getBytes());
    sink.write(bytes);

    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());
    assertArrayEquals(bytes, sink.getBytes());
  }

  public void testWriteFrom_inputStream() throws IOException {
    ByteArrayInputStream in = new ByteArrayInputStream(bytes);
    sink.writeFrom(in);

    assertTrue(sink.wasStreamOpened() && sink.wasStreamClosed());

    }

    assertContainsExpectedBytes();
  }

  public void testWrite() throws IOException {
    sink.write(data);

    assertContainsExpectedBytes();
  }

  public void testWriteFrom_inputStream() throws IOException {
    sink.writeFrom(new ByteArrayInputStream(data));

    assertContainsExpectedBytes();
  }

  private void assertContainsExpectedBytes() throws IOException {

    }

    assertContainsExpectedBytes();
  }

  public void testWrite() throws IOException {
    sink.write(data);

    assertContainsExpectedBytes();
  }

  public void testWriteFrom_inputStream() throws IOException {
    sink.writeFrom(new ByteArrayInputStream(data));

    assertContainsExpectedBytes();
  }

  private void assertContainsExpectedBytes() throws IOException {