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https://github.com/ocaml-tracing/ocaml-trace.git
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42bf837113
* add Trace_lwt optional library provides a with_span that's lwt friendly, as well as a ambient span provider. * test: extract recorder used for ambient tests * tests for trace.lwt * opam
24 lines
779 B
OCaml
24 lines
779 B
OCaml
(* Test ambient span tracking via thread-local-storage provider *)
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open Test_trace_common
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let ( let@ ) = ( @@ )
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let () =
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print_endline "=== ambient span (TLS) ===";
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Trace_thread_local_storage.setup ();
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let coll = make_recorder () in
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let@ () = Trace_core.with_setup_collector coll in
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Printf.printf "before any span: %s\n" (current_name ());
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let@ _outer = Trace_core.with_span ~__FILE__ ~__LINE__ "outer" in
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Printf.printf "in outer: %s\n" (current_name ());
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(* inner span is scoped to just the one printf *)
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(let@ _inner = Trace_core.with_span ~__FILE__ ~__LINE__ "inner" in
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ignore _inner;
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Printf.printf "in inner: %s\n" (current_name ()));
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(* inner has exited, outer span is restored *)
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Printf.printf "after inner exits: %s\n" (current_name ())
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