properly remove from the EntityIdIndex component on despawn

1 files changed, 51 insertions, 0 deletions

diff --git a/azalea-client/tests/move_despawned_entity.rs b/azalea-client/tests/move_despawned_entity.rs
new file mode 100644
index 00000000..74f7e942
--- /dev/null
+++ b/azalea-client/tests/move_despawned_entity.rs
@@ -0,0 +1,51 @@
+use azalea_client::test_simulation::*;
+use azalea_core::{position::ChunkPos, resource_location::ResourceLocation};
+use azalea_entity::metadata::Cow;
+use azalea_protocol::packets::{ConnectionProtocol, game::ClientboundMoveEntityRot};
+use azalea_registry::{DimensionType, EntityKind};
+use azalea_world::MinecraftEntityId;
+use bevy_ecs::query::With;
+use bevy_log::tracing_subscriber;
+
+#[test]
+fn test_move_despawned_entity() {
+    let _ = tracing_subscriber::fmt::try_init();
+
+    let mut simulation = Simulation::new(ConnectionProtocol::Game);
+    simulation.receive_packet(make_basic_login_packet(
+        DimensionType::new_raw(0),
+        ResourceLocation::new("azalea:overworld"),
+    ));
+
+    simulation.receive_packet(make_basic_empty_chunk(ChunkPos::new(0, 0), (384 + 64) / 16));
+    simulation.tick();
+    // spawn a cow
+    simulation.receive_packet(make_basic_add_entity(EntityKind::Cow, 123, (0.5, 64., 0.5)));
+    simulation.tick();
+
+    // make sure it's spawned
+    let mut cow_query = simulation.app.world_mut().query_filtered::<(), With<Cow>>();
+    let cow_iter = cow_query.iter(simulation.app.world());
+    assert_eq!(cow_iter.count(), 1, "cow should be despawned");
+
+    // despawn the cow by receiving a login packet
+    simulation.receive_packet(make_basic_login_packet(
+        DimensionType::new_raw(0),
+        ResourceLocation::new("azalea:overworld"),
+    ));
+    simulation.tick();
+
+    // make sure it's despawned
+    let mut cow_query = simulation.app.world_mut().query_filtered::<(), With<Cow>>();
+    let cow_iter = cow_query.iter(simulation.app.world());
+    assert_eq!(cow_iter.count(), 0, "cow should be despawned");
+
+    // send a move_entity_rot
+    simulation.receive_packet(ClientboundMoveEntityRot {
+        entity_id: MinecraftEntityId(123),
+        y_rot: 0,
+        x_rot: 0,
+        on_ground: false,
+    });
+    simulation.tick();
+}