1 files changed, 38 insertions, 0 deletions
diff --git a/azalea-client/src/test_utils/tracing.rs b/azalea-client/src/test_utils/tracing.rs
new file mode 100644
index 00000000..85ac4bd6
--- /dev/null
+++ b/azalea-client/src/test_utils/tracing.rs
@@ -0,0 +1,38 @@
+use bevy_log::tracing_subscriber::{
+    self, EnvFilter, Layer,
+    layer::{Context, SubscriberExt},
+    registry::LookupSpan,
+    util::SubscriberInitExt,
+};
+use tracing::{Event, Level, Subscriber, level_filters::LevelFilter};
+
+pub fn init_tracing() {
+    init_tracing_with_level(Level::WARN);
+}
+
+pub fn init_tracing_with_level(max_level: Level) {
+    tracing_subscriber::registry()
+        .with(
+            tracing_subscriber::fmt::layer().with_filter(
+                EnvFilter::builder()
+                    .with_default_directive(max_level.into())
+                    .from_env_lossy(),
+            ),
+        )
+        .with(TestTracingLayer {
+            panic_on_level: max_level,
+        })
+        .init();
+}
+
+struct TestTracingLayer {
+    panic_on_level: Level,
+}
+impl<S: Subscriber> Layer<S> for TestTracingLayer {
+    fn on_event(&self, event: &Event<'_>, _ctx: Context<'_, S>) {
+        let level = *event.metadata().level();
+        if level <= self.panic_on_level {
+            panic!("logged on level {level}");
+        }
+    }
+}