1 files changed, 30 insertions, 0 deletions
diff --git a/internal/world/mob_rekey_test.go b/internal/world/mob_rekey_test.go
new file mode 100644
index 0000000..3a0eb85
--- /dev/null
+++ b/internal/world/mob_rekey_test.go
@@ -0,0 +1,30 @@
+package world
+
+import "testing"
+
+// TestRekeyRoomsUpdatesMobDespawnRooms: DespawnRooms is a live room reference
+// (sys_triggers compares it against the owner's current room). A room rename
+// must remap it alongside RoomID/HomeRoomID/WanderRooms, or a transient mob
+// despawns while its owner never left the allowed room.
+func TestRekeyRoomsUpdatesMobDespawnRooms(t *testing.T) {
+	s := &MobStore{instances: map[string]*MobInstance{
+		"m1": {
+			InstanceID:   "m1",
+			RoomID:       1,
+			HomeRoomID:   1,
+			WanderRooms:  []int{1, 5},
+			DespawnRooms: []int{1, 5},
+		},
+	}}
+	s.RekeyRooms(map[int]int{1: 3, 5: 7})
+	inst := s.instances["m1"]
+	if inst.RoomID != 3 || inst.HomeRoomID != 3 {
+		t.Fatalf("room/home = %d/%d, want 3/3", inst.RoomID, inst.HomeRoomID)
+	}
+	if got := inst.WanderRooms; len(got) != 2 || got[0] != 3 || got[1] != 7 {
+		t.Fatalf("wander_rooms = %v, want [3 7]", got)
+	}
+	if got := inst.DespawnRooms; len(got) != 2 || got[0] != 3 || got[1] != 7 {
+		t.Fatalf("despawn_rooms = %v, want [3 7]", got)
+	}
+}