HelpersTest.cs

using Shouldly;
using Xunit;

namespace Problems.Tests
{
    public class HelpersTess
    {
        [Fact]
        public void Sum_ShouldBeSuccess()
        {
            Helpers.Sum(1, 2).ShouldBe(3);
        }
        
        [Theory]
        [InlineData(1, 2, 3)]
        [InlineData(5, 5, 10)]
        [InlineData(13, 7, 20)]
        public void SumTheory_ShouldBeSuccess(int number1, int number2, int expectedResult)
        {
            Helpers.Sum(number1, number2).ShouldBe(expectedResult);
        }
    }
}