for (double x : POSITIVE_FINITE_DOUBLE_CANDIDATES) {
      boolean isPowerOfTwo = StrictMath.pow(2.0, DoubleMath.log2(x, FLOOR)) == x;
      try {
        int log2 = DoubleMath.log2(x, UNNECESSARY);
        assertEquals(x, Math.scalb(1.0, log2));
        assertTrue(isPowerOfTwo);
      } catch (ArithmeticException e) {
        assertFalse(isPowerOfTwo);
      }
    }
  }

    for (double x : POSITIVE_FINITE_DOUBLE_CANDIDATES) {
      boolean isPowerOfTwo = StrictMath.pow(2.0, DoubleMath.log2(x, FLOOR)) == x;
      try {
        int log2 = DoubleMath.log2(x, UNNECESSARY);
        assertEquals(x, Math.scalb(1.0, log2));
        assertTrue(isPowerOfTwo);
      } catch (ArithmeticException e) {
        assertFalse(isPowerOfTwo);
      }
    }
  }