How do I put new List {1} in an NUNIT TestCase?

Question

I have the method:

public static int Add(List numbers)
    {
        if (numbers == null || numbers.Count == 0)
            return 0;

        if          


        

Answer 1

Just create the list inside the method instead, like this:

public void Add_WithOneNumber_ReturnsNumber()
{
    var result = CalculatorLibrary.CalculatorFunctions.Add(new List{1});

    Assert.AreEqual(1, result);
}