new RoundToDoubleTester(BigDecimal.valueOf(-1L << 53))
        .setExpectation(-Math.pow(2, 53), values())
        .test();
  }

  public void testRoundToDouble_minPreciselyRepresentableMinusOne() {
    // the representable doubles are -2^53 and -2^53 - 2.
    // -2^53-1 is halfway between, so HALF_UP will go up and HALF_DOWN will go down.