I have a method that sorts a collection based on a property like this:

```
public List<Student> GetAllStudents()
{
    return _studentCatalogContext.Student.Where(x => (x.Course != 2 && x.Course != 6))
                                 .OrderByDescending(x => x.EnrollDateTime).ToList();
}

```

So the idea is to have, in this case, the most recently enrolled Student first.

Since the result of the method call will be a sorted list with the newest enrollment first I wrote a test like this:

```
[TestMethod]
public void Calling_GetAllStudents_ReturnsSortedListOfStudents()
{
    var studentsList = new List<Student> {
    new Student {
                     Id = "123",
                     EnrollTime = "02/22/16 14:06:56 PM",
                     Course = 1
                 },
     new Student {
                     Id = "456",
                     EnrollTime = "03/30/16 12:50:38 PM",
                     Course = 3
                 }
                 };

    _studnentRepository.Setup(x=>x.GetAllStudents()).Returns(studentsList);

    Assert.AreEqual("02/22/16 14:06:56 PM", studentsList[0].EnrollTime);
}

```

It's been suggested that this test does is not valid in that it sets a value and then asserts on it.

How would I write a correct unit test in this case?