问单元测试在比较集合时不能正常工作

EN

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
}

[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);
}