public void Given_Null_Array_Should_Compute_Zero_As_Closest_To_Zero()
        {
            // arrange
            const int[] numbers = null;

            // act
            var closest = ClosestToZeroKata.ClosestToZero(numbers);

            // assert
            closest.Should().Be(0);
        }
        public void Given_Empty_Array_Should_Compute_Zero_As_Closest_To_Zero()
        {
            // arrange
            var numbers = Array.Empty <int>();

            // act
            var closest = ClosestToZeroKata.ClosestToZero(numbers);

            // assert
            closest.Should().Be(0);
        }
 public int Solution()
 {
     return(ClosestToZeroKata.ClosestToZero(_array));
 }