public void SimpleTest_3()
        {
            var nums = new int[2] {
                -1, -2
            };

            var result = new SmallestPositive().solution(nums);

            Assert.Equal(1, result);
        }
        public void SimpleTest_1()
        {
            var nums = new int[6] {
                1, 3, 6, 4, 1, 2
            };

            var result = new SmallestPositive().solution(nums);

            Assert.Equal(5, result);
        }
        public void SimpleTest_2()
        {
            var nums = new int[3] {
                1, 2, 3
            };

            var result = new SmallestPositive().solution(nums);

            Assert.Equal(4, result);
        }