alefcarlos

namespace Problems
{
    public static class Helpers
    {
        /// <summary>
        /// Sums two numbers.
        /// </summary>
        /// <param name="a">First number.</param>
        /// <param name="b">Second number.</param>
        /// <returns>Returns the sum of two specified integer numbers.</returns>

alefcarlos

using Shouldly;
using Xunit;

namespace Problems.Tests
{
    public class HelpersTess
    {
        [Fact]
        public void Sum_ShouldBeSuccess()
        {

alefcarlos

using Xunit;

namespace Problems.Tests
{
    public class HelpersTess
    {
        [Fact]
        public void Sum_ShouldBeSuccess()
        {
            // Helpers.Sum(1, 2).ShouldBe(3);

alefcarlos

using Shouldly;
using Xunit;

namespace Problems.Tests
{
    public class HelpersTess
    {
        [Fact]
        public void Sum_ShouldBeSuccess()
        {

alefcarlos

/// <summary>
/// Validadtes if a value is multiple of other number
/// </summary>
/// <param name="y">The desired multiple.</param>
/// <param name="x">Value to check.</param>
/// <returns>Returns true if value is multiple of multiple</returns>
public static bool IsMultipleOf(int y, int x)
{
    //Check possible DivisionByZero
    if (y == 0)

alefcarlos

[Fact]
public void MultpleOf_ShouldThrowExpcetion()
{

    Should.Throw<ArgumentException>(() =>
    {
        Helpers.IsMultipleOf(0, 3);
    });
}

alefcarlos

[Theory]
[InlineData(3, 3)]
[InlineData(3, 6)]
[InlineData(3, 9)]
[InlineData(5, 5)]
[InlineData(5, 10)]
[InlineData(5, 15)]
public void Multiple_ShouldSuccess(int y, int x)
{
    Helpers.IsMultipleOf(y, x).ShouldBeTrue();

alefcarlos

[Theory]
[InlineData(3, 1)]
[InlineData(3, 5)]
public void Multiple_ShouldFail(int y, int x)
{
    Helpers.IsMultipleOf(y, x).ShouldBeFalse();
}

alefcarlos

using System.Linq;

....

public static int SumOfMultiples(int max, params int[] possibleMultiples)
{
    int sum = 0;

    //Validate if the number is MultipleOf, then sum it
    for (int value = 1; value < max; value++)

alefcarlos

using Shouldly;
using Xunit;

namespace Problems.Tests
{
    public class ProblemsSolutionTests
    {
        /// <summary>
        /// If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
        //  Find the sum of all the multiples of 3 or 5 below 1000.