1 files changed, 42 insertions, 0 deletions
diff --git a/vendor/tracing-subscriber/tests/layer_filters/boxed.rs b/vendor/tracing-subscriber/tests/layer_filters/boxed.rs
new file mode 100644
index 000000000..0fe37188e
--- /dev/null
+++ b/vendor/tracing-subscriber/tests/layer_filters/boxed.rs
@@ -0,0 +1,42 @@
+use super::*;
+use tracing_subscriber::{filter, prelude::*, Layer};
+
+fn layer() -> (ExpectLayer, subscriber::MockHandle) {
+    layer::mock().done().run_with_handle()
+}
+
+fn filter<S>() -> filter::DynFilterFn<S> {
+    // Use dynamic filter fn to disable interest caching and max-level hints,
+    // allowing us to put all of these tests in the same file.
+    filter::dynamic_filter_fn(|_, _| false)
+}
+
+/// reproduces https://github.com/tokio-rs/tracing/issues/1563#issuecomment-921363629
+#[test]
+fn box_works() {
+    let (layer, handle) = layer();
+    let layer = Box::new(layer.with_filter(filter()));
+
+    let _guard = tracing_subscriber::registry().with(layer).set_default();
+
+    for i in 0..2 {
+        tracing::info!(i);
+    }
+
+    handle.assert_finished();
+}
+
+/// the same as `box_works` but with a type-erased `Box`.
+#[test]
+fn dyn_box_works() {
+    let (layer, handle) = layer();
+    let layer: Box<dyn Layer<_> + Send + Sync + 'static> = Box::new(layer.with_filter(filter()));
+
+    let _guard = tracing_subscriber::registry().with(layer).set_default();
+
+    for i in 0..2 {
+        tracing::info!(i);
+    }
+
+    handle.assert_finished();
+}