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https://github.com/ocaml-tracing/ocaml-opentelemetry.git
synced 2026-03-08 03:47:59 -04:00
60 lines
1.8 KiB
OCaml
60 lines
1.8 KiB
OCaml
open Alcotest
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module Otel = Opentelemetry
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let spans_emitted : Otel.Span.t list ref = ref []
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let test_exporter : Otel.Exporter.t =
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let open Otel.Exporter in
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{
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(dummy ()) with
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emit_spans =
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Opentelemetry_emitter.To_list.to_list ~signal_name:"spans" spans_emitted;
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}
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let with_test_exporter f =
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(* uncomment for eprintf debugging: *)
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(* let test_exporter = Opentelemetry_client.Exporter_debug.debug test_exporter in*)
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Otel.Main_exporter.with_setup_debug_backend test_exporter () f
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let bytes_to_hex = Opentelemetry_util.Util_bytes_.bytes_to_hex
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let test_stack_based_implicit_scope () =
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let run () =
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Otel.Tracer.with_ "first trace" @@ fun _scope ->
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Thread.delay 0.2;
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Otel.Tracer.with_ "second trace" @@ fun _scope ->
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Thread.delay 0.2;
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Otel.Tracer.with_ "third trace" @@ fun _scope ->
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Thread.delay 0.2;
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()
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in
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with_test_exporter @@ fun () ->
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(* start *)
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run ();
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check' int ~msg:"count of spans emitted"
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~actual:(List.length !spans_emitted)
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~expected:3;
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let open Otel.Proto.Trace in
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let f prev_span_id (sp : Otel.Span.t) =
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Format.printf "%a@." pp_span sp;
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let { name; trace_id; span_id; parent_span_id; _ } = sp in
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Printf.printf
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"name='%s' trace_id='%s' span_id='%s' parent_span_id='%s' \
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prev_span_id='%s'\n"
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name (bytes_to_hex trace_id) (bytes_to_hex span_id)
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(bytes_to_hex parent_span_id)
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(bytes_to_hex prev_span_id);
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check' string ~msg:"previous span is parent"
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~actual:(bytes_to_hex parent_span_id)
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~expected:(bytes_to_hex prev_span_id);
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span_id
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in
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List.fold_left f (Bytes.of_string "") !spans_emitted |> ignore
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let suite =
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[
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test_case "stack-based implicit scope" `Quick
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test_stack_based_implicit_scope;
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]
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let () = Alcotest.run "implicit scope" [ "sync", suite ]
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