Add integration test for entity deletion.

Content.IntegrationTests/Tests/DeleteInventoryTest.cs

@@ -0,0 +1,51 @@
+using System.Threading.Tasks;
+using Content.Server.GameObjects.Components.GUI;
+using Content.Server.GameObjects.Components.Items.Clothing;
+using NUnit.Framework;
+using Robust.Shared.Interfaces.GameObjects;
+using Robust.Shared.Interfaces.Map;
+using Robust.Shared.IoC;
+using Robust.Shared.Map;
+using static Content.Shared.GameObjects.Components.Inventory.EquipmentSlotDefines;
+
+namespace Content.IntegrationTests.Tests
+{
+    [TestFixture]
+    public class DeleteInventoryTest : ContentIntegrationTest
+    {
+        // Test that when deleting an entity with an InventoryComponent,
+        // any equipped items also get deleted.
+        [Test]
+        public async Task Test()
+        {
+            var server = StartServerDummyTicker();
+
+            server.Assert(() =>
+            {
+                // Spawn everything.
+                var mapMan = IoCManager.Resolve<IMapManager>();
+
+                mapMan.CreateNewMapEntity(MapId.Nullspace);
+
+                var entMgr = IoCManager.Resolve<IEntityManager>();
+                var container = entMgr.SpawnEntity(null, MapCoordinates.Nullspace);
+                var inv = container.AddComponent<InventoryComponent>();
+
+                var child = entMgr.SpawnEntity(null, MapCoordinates.Nullspace);
+                var item = child.AddComponent<ClothingComponent>();
+                item.SlotFlags = SlotFlags.HEAD;
+
+                // Equip item.
+                Assert.That(inv.Equip(Slots.HEAD, item, false), Is.True);
+
+                // Delete parent.
+                container.Delete();
+
+                // Assert that child item was also deleted.
+                Assert.That(item.Deleted, Is.True);
+            });
+
+            await server.WaitIdleAsync();
+        }
+    }
+}