a test for bank item_id stuff

tests/test_item_id.rs

@@ -296,3 +296,78 @@ async fn test_using_some_monomates_after_a_convoluted_series_of_leaves_and_joins
     }).unwrap();
 }
 
+
+#[async_std::test]
+async fn test_depositing_a_full_stack_then_withdrawing_part() {
+    let mut entity_gateway = InMemoryGateway::default();
+    let (_user1, char1) = new_user_character(&mut entity_gateway, "a1", "a", 1).await;
+
+    let mut p1_items = Vec::new();
+    for tool in vec![item::tool::ToolType::Monofluid, item::tool::ToolType::Difluid, item::tool::ToolType::Trifluid].into_iter() {
+        let mut item = Vec::new();
+        for _ in 0..5usize {
+            item.push(entity_gateway.create_item(
+                item::NewItemEntity {
+                    item: item::ItemDetail::Tool(
+                        item::tool::Tool {
+                            tool: tool
+                        }
+                    ),
+                }).await.unwrap());
+        }
+        p1_items.push(item::InventoryItemEntity::Stacked(item));
+    }
+    entity_gateway.set_character_inventory(&char1.id, &item::InventoryEntity::new(p1_items)).await.unwrap();
+
+    let mut monomates = Vec::new();
+    for _ in 0..3usize {
+        monomates.push(entity_gateway.create_item(
+            item::NewItemEntity {
+                item: item::ItemDetail::Tool(
+                    item::tool::Tool {
+                        tool: item::tool::ToolType::Monomate,
+                    }
+                ),
+            }).await.unwrap());
+    }
+    entity_gateway.set_character_bank(&char1.id, &item::BankEntity::new(vec![monomates]), &item::BankName("".into())).await.unwrap();
+
+    let mut ship = Box::new(ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build());
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    join_lobby(&mut ship, ClientId(1)).await;
+    create_room(&mut ship, ClientId(1), "room", "").await;
+
+    ship.handle(ClientId(1), RecvShipPacket::DirectMessage(DirectMessage::new(0, GameMessage::BankRequest(BankRequest {
+        client: 0,
+        target: 0,
+        unknown: 0,
+    })))).await.unwrap();
+
+    ship.handle(ClientId(1), RecvShipPacket::DirectMessage(DirectMessage::new(0, GameMessage::BankInteraction(BankInteraction {
+        client: 0,
+        target: 0,
+        item_id: 0x10001,
+        action: 0,
+        item_amount: 5,
+        meseta_amount: 0,
+        unknown: 0,
+    })))).await.unwrap();
+
+    ship.handle(ClientId(1), RecvShipPacket::DirectMessage(DirectMessage::new(0, GameMessage::BankInteraction(BankInteraction {
+        client: 0,
+        target: 0,
+        item_id: 0x10001,
+        action: 1,
+        item_amount: 3,
+        meseta_amount: 0,
+        unknown: 0,
+    })))).await.unwrap();
+
+    ship.handle(ClientId(1), RecvShipPacket::Message(Message::new(GameMessage::PlayerUseItem(PlayerUseItem {
+        client: 0,
+        target: 0,
+        item_id: 0x20001,
+    })))).await.unwrap();
+}