How to compare Lists in Unit Testing

Question

How can this test fail?

[TestMethod]
public void Get_Code()
{
    var expected = new List();
    expected.A         


        

Answer 1

I tried the other answers in this thread, and they didn't work for me and I was comparing collections of objects that had the same values stored in their properties, but the objects were different.

Method Call :

CompareIEnumerable(to, emailDeserialized.ToIndividual,
            (x, y) => x.ToName == y.ToName && x.ToEmailAddress == y.ToEmailAddress);

Method for comparisons:

private static void CompareIEnumerable(IEnumerable one, IEnumerable two, Func comparisonFunction)
    {
        var oneArray = one as T[] ?? one.ToArray();
        var twoArray = two as T[] ?? two.ToArray();

        if (oneArray.Length != twoArray.Length)
        {
            Assert.Fail("Collections are not same length");
        }

        for (int i = 0; i < oneArray.Length; i++)
        {
            var isEqual = comparisonFunction(oneArray[i], twoArray[i]);
            Assert.IsTrue(isEqual);
        }
    }