Add TicksAlive component (#229)

* Add TicksAlive component

* Rename TicksAlive to TicksConnected

* Move component to plugins/tick_counter.rs and add doc comment

1 files changed, 57 insertions, 0 deletions

diff --git a/azalea-client/tests/ticks_alive.rs b/azalea-client/tests/ticks_alive.rs
new file mode 100644
index 00000000..3be9a09c
--- /dev/null
+++ b/azalea-client/tests/ticks_alive.rs
@@ -0,0 +1,57 @@
+use azalea_client::{test_utils::prelude::*, tick_counter::TicksConnected};
+use azalea_core::resource_location::ResourceLocation;
+use azalea_protocol::packets::{config::{ClientboundFinishConfiguration, ClientboundRegistryData}, ConnectionProtocol};
+use azalea_registry::{DataRegistry, DimensionType};
+use simdnbt::owned::{NbtCompound, NbtTag};
+
+#[test]
+fn counter_increments_and_resets_on_disconnect() {
+    init_tracing();
+
+    let mut simulation = Simulation::new(ConnectionProtocol::Configuration);
+
+    simulation.receive_packet(ClientboundRegistryData {
+        registry_id: ResourceLocation::new("minecraft:dimension_type"),
+        entries: vec![(
+            ResourceLocation::new("minecraft:overworld"),
+            Some(NbtCompound::from_values(vec![
+                ("height".into(), NbtTag::Int(384)),
+                ("min_y".into(), NbtTag::Int(-64)),
+            ])),
+        )]
+        .into_iter()
+        .collect(),
+    });
+
+    simulation.receive_packet(ClientboundFinishConfiguration);
+
+    simulation.tick();
+    // we need a second tick to handle the state switch properly
+    simulation.tick();
+
+    assert!(!simulation.has_component::<TicksConnected>());
+
+    simulation.receive_packet(make_basic_login_packet(
+        DimensionType::new_raw(0), // overworld
+        ResourceLocation::new("minecraft:overworld"),
+    ));
+    simulation.tick();
+
+    assert!(simulation.has_component::<TicksConnected>());
+    assert_eq!(simulation.component::<TicksConnected>().0, 1);
+
+    // Tick three times; counter should read 2, 3, 4.
+    for expected in 2..=4 {
+        simulation.tick();
+        let counter = simulation.component::<TicksConnected>();
+        assert_eq!(
+            counter.0, expected,
+            "after {expected} tick(s) counter should be {expected}"
+        );
+    }
+
+    simulation.disconnect();
+    simulation.tick();
+
+    assert!(!simulation.has_component::<TicksConnected>());
+}