BigInteger expectedResult = BigIntegerMath.floorPowerOfTwo(BigInteger.valueOf(x));
      assertEquals(expectedResult.intValue(), IntMath.floorPowerOfTwo(x));
    }
  }

  public void testCeilingPowerOfTwoNegative() {
    for (int x : NEGATIVE_INTEGER_CANDIDATES) {
      assertThrows(IllegalArgumentException.class, () -> IntMath.ceilingPowerOfTwo(x));
    }
  }

  public void testFloorPowerOfTwoNegative() {

      BigInteger expectedResult = BigIntegerMath.floorPowerOfTwo(BigInteger.valueOf(x));
      assertEquals(expectedResult.intValue(), IntMath.floorPowerOfTwo(x));
    }
  }

  public void testCeilingPowerOfTwoNegative() {
    for (int x : NEGATIVE_INTEGER_CANDIDATES) {
      assertThrows(IllegalArgumentException.class, () -> IntMath.ceilingPowerOfTwo(x));
    }
  }

  public void testFloorPowerOfTwoNegative() {

      BigInteger expectedResult = BigIntegerMath.floorPowerOfTwo(BigInteger.valueOf(x));
      assertEquals(expectedResult.longValue(), LongMath.floorPowerOfTwo(x));
    }
  }

  public void testCeilingPowerOfTwoNegative() {
    for (long x : NEGATIVE_LONG_CANDIDATES) {
      assertThrows(IllegalArgumentException.class, () -> LongMath.ceilingPowerOfTwo(x));
    }
  }

  public void testFloorPowerOfTwoNegative() {