public void NextDoubleHighRes_Max()
        {
            var    rng = new ConstantRandomSource(ulong.MaxValue);
            double x   = rng.NextDoubleHighRes();

            Assert.Equal(1.0, x);
        }
        public void NextDoubleHighRes_Min()
        {
            var    rng = new ConstantRandomSource(0UL);
            double x   = rng.NextDoubleHighRes();

            Assert.Equal(0.0, x);
        }