@Test
public void onShoppingCartQuantityUpdated_updatesViewWithNewQuantity_whenCartItemIsSameAsCurrentOne() {

    ShoppingCartQuantityChangeEvent updateEvent =
            new ShoppingCartQuantityChangeEvent(currentShoppingCartItem, NEW_QUANTITY);
    presenter.onShoppingCartQuantityChanged(updateEvent);
    verify(view).updateQuantity(NEW_QUANTITY);
}