xUnit : Assert two List<T> are equal?

Question

I'm new to TDD and xUnit so I want to test my method that looks something like:

List<T> DeleteElements<T>(this List<T> a, List<T> b); 

Is there any Assert method that I can use ? I think something like this would be nice

List<int> values = new List<int>() { 1, 2, 3 }; List<int> expected = new List<int>() { 1 }; List<int> actual = values.DeleteElements(new List<int>() { 2, 3 });  Assert.Exact(expected, actual); 

Is there something like this ?

Answer 1

2021-Apr-01 update

I recommend using FluentAssertions. It has a vast IntelliSense-friendly assertion library for many use cases including collections

collection.Should().Equal(1, 2, 5, 8); collection.Should().NotEqual(8, 2, 3, 5); collection.Should().BeEquivalentTo(8, 2, 1, 5); 

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Original answer

xUnit.Net recognizes collections so you just need to do

Assert.Equal(expected, actual); // Order is important 

You can see other available collection assertions in CollectionAsserts.cs

For NUnit library collection comparison methods are

CollectionAssert.AreEqual(IEnumerable, IEnumerable) // For sequences, order matters 

and

CollectionAssert.AreEquivalent(IEnumerable, IEnumerable) // For sets, order doesn't matter 

More details here: CollectionAssert

MbUnit also has collection assertions similar to NUnit: Assert.Collections.cs

Answer 2

In the current version of XUnit (1.5) you can just use

Assert.Equal(expected, actual);

The above method will do an element by element comparison of the two lists. I'm not sure if this works for any prior version.