Unit test not working correctly when comparing collections

Question

I have a very simple method which queries the database and returns a value. The code is as follows:

public List<int?> TravelTime()
{
   List<int?> items = new List<int?>();
   Induction induction = new Induction();
   using (var dbContext = new MyEntites())
   {
     var query = dbContext.MyTable.Select(a => a.Travel_Time).Take(1);

      foreach (var item in query)
      {
        induction.TravelTime = item;
        items.Add(induction.TravelTime);
      }
   }
   return items;// Value here is 8
}

I'm trying to unit test this method with the following code:

[TestMethod]
public void Check_Travel_Time_Test()
{
  //Arrange
  InductionView vModel = new InductionView();
  Induction induction = new Induction();
  List<int?> actual = new List<int?>();
  induction.TravelTime = 8;
  actual.Add(induction.TravelTime);

  //Act
  var expected = vModel.TravelTime();

  //Assert
  Assert.AreEqual(expected, actual);
}

I don't know why it's not passing. The exception I get is.

Expected:<System.Collections.Generic.List'1[System.Nullable'1[System.Int32]]>.

Actual:<System.Collections.Generic.List'1[System.Nullable'1[System.Int32]]>.

If I debug I have the correct values and count is 1 in My TravelMethod and Test method. Can someone tell me where I'm going wrong? Thanks in advance for your help.

Answer 1

Assert.AreEqual compares references, not the content. You need to use CollectionAssert class and its methods, like CollectionAssert.AreEquivalent