func TestGroceryList(t *testing.T) {
    client := NewFakeClient(t, 
      &Note{"apples"}, nil,
      &Note{"oranges"}, 4,
    )

    list := New()
    list.Store = client

    list.AddItem("apples")
    client.Done(t)
    // t.Error("Expected 'oranges' to be added to the list")
}