C# Unit Testing

Question

I'm implementing the following tests:

[TestMethod]
public void Index_Get_RetrievesAllContributionsFromRepository()
{
    // Arrange
    Contributions Contribution1 = GetContributionNamed("Council", 2003);
    Contributions Contribution2 = GetContributionNamed("Council", 2004);

    InMemoryContributionRepository repository = new InMemoryContributionRepository();
    repository.Add(Contribution1);
    repository.Add(Contribution2);
    var controller = GetHomeController(repository);

    // Act
    var result = controller.Index();

    // Assert
    var model = (IEnumerable<Contributions>)result.ViewData.Model;
    CollectionAssert.Contains(model.ToList(), Contribution1);
    CollectionAssert.Contains(model.ToList(), Contribution2);
    CollectionAssert.xxxxxx(model.ToList().Count, Contribution1, 2);
}

The last test there with the xxxxxx is trying to check if Contribution1 has 2 values, which it does. What line of code performs that test please?

c# novice

There are 3 parameters. You you explained 2. What does model.ToList().Count mean in that line? — Euphoric
– Euphoric, Commented Jul 23, 2012 at 9:49

Jon Skeet · Accepted Answer · 2012-07-23 09:51:19Z

5

It sounds like you just want:

Assert.AreEqual(2, model.Count());

But it sounds like you'd be better using:

CollectionAssert.AreEquivalent(new[] { Contribution1, Contribution2 },
                               model.ToList());

... That can replace all three of your lines.

In both cases note that the expected value should be the first argument, and the actual value should be the second.

answered Jul 23, 2012 at 9:51

Jon Skeet

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Comments

Euphoric · Accepted Answer · 2012-07-23 09:50:03Z

1

Assert.AreEqual(model.ToList().Count, 2);

answered Jul 23, 2012 at 9:50

Euphoric

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