public void WhenTheArrayIsEmptyTheSumIsZero()
{
int[] nums = { };
var result = ExerciseMethods.SumArray(nums);
Assert.AreEqual(0, result);
}
public void WhenTheArrayIsPopulatedTheSumIsCorrect()
{
int[] nums = { 3, 7, 1, 2, 4 };
var result = ExerciseMethods.SumArray(nums);
Assert.AreEqual(17, result);
}