public void TestMapShouldReturnDescendingValues(bool?value, double?expected)
        {
            _map = new BooleanToSizeMap(0d, 1d, SortOrder.Descending);
            var result = _map.Map(value);

            Assert.That(result, Is.EqualTo(expected));
        }
        public void TestMapShouldReturnAscendingValues(bool?value, double?expected)
        {
            var result = _map.Map(value);

            Assert.That(result, Is.EqualTo(expected));
        }