public void AddADoor_IsNotNullTest()
{
//Arrange
Badge badgeOne = new Badge();
//this is how you add a string to a list below line 69
badgeOne.Id = 1;
BadgeRepository repository = new BadgeRepository();
repository.AddBadgesToTheList(badgeOne);
//Act
repository.AddADoor(1, "NewDoor");
//Assert
Assert.IsNotNull(badgeOne.Doors);
}