public void Cursor_fill_returns_any_extras()
{
var cursor = _container.GetCursor(5);
var remaining = _container.Fill(cursor, new InventoryStack(_model1, 10));
// filled (to 10), remaining is 5
Assert.AreEqual(new InventoryStack(_model1, 10), Get(5));
Assert.AreEqual(new InventoryStack(_model1, 5), remaining);
}