sorting test. need to rename the test file

tests/test_item_equip.rs

@@ -216,3 +216,75 @@ async fn test_unequip_armor_with_units() {
     assert!(unit1_equipped == false);
     assert!(unit2_equipped == false);
 }
+
+#[async_std::test]
+async fn test_sort_items() {
+    let mut entity_gateway = InMemoryGateway::new();
+
+    let (_user1, char1) = new_user_character(&mut entity_gateway, "a1", "a").await;
+
+    entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Armor(
+                item::armor::Armor{
+                    armor: item::armor::ArmorType::Frame,
+                    dfp: 0,
+                    evp: 0,
+                    slots: 4,
+                    modifiers: Vec::new(),
+                }),
+            location: item::ItemLocation::Inventory {
+                character_id: char1.id,
+                slot: 0,
+                equipped: true,
+            }
+        }).await;
+
+    entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Unit(
+                item::unit::Unit{
+                    unit: item::unit::UnitType::KnightPower,
+                    modifier: None,
+                    armor_slot: 0,
+                }),
+            location: item::ItemLocation::Inventory {
+                character_id: char1.id,
+                slot: 1,
+                equipped: false,
+            }
+        }).await;
+
+    entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Unit(
+                item::unit::Unit{
+                    unit: item::unit::UnitType::KnightPower,
+                    modifier: Some(item::unit::UnitModifier::Plus),
+                    armor_slot: 0,
+                }),
+            location: item::ItemLocation::Inventory {
+                character_id: char1.id,
+                slot: 2,
+                equipped: false,
+            }
+        }).await;
+    
+    let mut ship = 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::Message(Message::new(GameMessage::SortItems(SortItems {
+        client: 255,
+        target: 255,
+        item_ids: [0x10001u32, 0x10002, 0x10000, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 
+        0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 
+        0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF],
+    })))).await.unwrap().for_each(drop);
+
+    let items = entity_gateway.get_items_by_character(&char1).await;
+    assert!(items[2].item.item_type() == item::ItemType::Armor(item::armor::ArmorType::Frame));
+}