byte[] b = ByteStreams.toByteArray(in, 99);
    assertThat(b).isEqualTo(PRE_FILLED_100);
  }

  public void testToByteArray_withSize_givenSizeTwoSmallerThanActual() throws IOException {
    InputStream in = new ByteArrayInputStream(PRE_FILLED_100);
    byte[] b = ByteStreams.toByteArray(in, 98);
    assertThat(b).isEqualTo(PRE_FILLED_100);
  }