Unit-testing IList with CollectionAssert

Question

The MSTest framework has a CollectionAssert that accepts ICollections. My method returns an IList. Apparently a list is not a collection..

Are there ways to make my IList an ICollection?

Nicety

The connect issue for this. Usual Microsoft response, tsss. connect.microsoft.com/VisualStudio/feedback/details/477870/… – Lineolate

Answer 1

You could call the ToArray() extension method on it - Array implements ICollection

Edit: Also, while List<T> implements ICollection, IList<T> only implements ICollection<T> which does not implement ICollection, so if you know the item in the test is a List<T>, you should be able to cast it...

Autarch

I think IEnumerable for the parameters would have been a better choice. NUnit has got this one right. – Levity

Answer 2

You can send in a List

    List<string> actual = new List<string>(){"1","2","3"};
    List<string> expected = new List<string>(){"1","2","**EditCaseFalse**"};
    CollectionAssert.AreEqual(actual,expected)

I get back Failed (third element does not match.)

Laundes

and how exactly is this related to the question? – Nicety

I send in two list<string> (IList) that are compared in CollectionAssert is that your problem... – Laundes

I'm sorry, I didn't read in enough on your answer. Please refer @Lee's answer about why this is working but not a solution to my problem. – Nicety

I edited your answer to remove a bit of noise so the actual answer is clearer. If you mind, please feel free to roll back. – Nicety