public void RemoveItem_sets_Item_Order_null()
{
var order = new Order();
var item = new OrderItem();
order.AddItem(item);
order.RemoveItem(item);
Assert.IsNull(item.Order);
Assert.False(order.Items.Any());
}
public void AddRemoteItem_can_switch_orders()
{
var order1 = new Order();
var order2 = new Order();
var item = new OrderItem();
order1.AddItem(item);
Assert.AreSame(order1, item.Order);
Assert.True(order1.Items.Contains(item));
Assert.False(order2.Items.Any());
order1.RemoveItem(item);
order2.AddItem(item);
Assert.AreSame(order2, item.Order);
Assert.True(order2.Items.Contains(item));
Assert.AreEqual(1, order2.Items.Count());
Assert.False(order1.Items.Any());
}
