mte/unikernel/duniverse/logs/test/test_lwt.ml
2025-11-11 02:07:51 +01:00

62 lines
2.1 KiB
OCaml

(*---------------------------------------------------------------------------
Copyright (c) 2015 The logs programmers. All rights reserved.
SPDX-License-Identifier: ISC
---------------------------------------------------------------------------*)
open B0_testing
let ( >>= ) = Lwt.bind
let lwt_reporter () =
let buf_fmt ~like =
let b = Buffer.create 512 in
Fmt.with_buffer ~like b,
fun () -> let m = Buffer.contents b in Buffer.reset b; m
in
let app, app_flush = buf_fmt ~like:Fmt.stdout in
let dst, dst_flush = buf_fmt ~like:Fmt.stderr in
let reporter = Logs_fmt.reporter ~app ~dst () in
let report src level ~over k msgf =
let k () =
let write () = match level with
| Logs.App -> Lwt_io.write Lwt_io.stdout (app_flush ())
| _ -> Lwt_io.write Lwt_io.stderr (dst_flush ())
in
let unblock () = over (); Lwt.return_unit in
Lwt.finalize write unblock |> Lwt.ignore_result;
k ()
in
reporter.Logs.report src level ~over:(fun () -> ()) k msgf;
in
{ Logs.report = report }
let test_count () =
let logit () =
Logs_lwt.warn (fun m -> m "Hey") >>= fun () ->
Logs_lwt.err (fun m -> m "Ho") >>= fun () ->
Logs_lwt.warn (fun m -> m "Let's go")
in
Test.int (Logs.err_count ()) 1 ~__POS__;
Test.int (Logs.warn_count ()) 1 ~__POS__;
Logs.set_level None;
logit () >>= fun () ->
Test.int (Logs.err_count ()) 2 ~__POS__;
Test.int (Logs.warn_count ()) 3 ~__POS__;
Lwt.return_unit
let main () =
Test.main @@ fun () ->
Fmt_tty.setup_std_outputs ();
Logs.set_reporter @@ lwt_reporter ();
Lwt_main.run @@ begin
Logs.set_level (Some Logs.Debug);
Logs_lwt.info (fun m -> m ~header:"START" ?tags:None "Starting main")
>>= fun () -> Logs_lwt.warn (fun m -> m "Hey be warned by %d." 7)
>>= fun () -> Logs_lwt.err (fun m -> m "Hey be errored.")
>>= fun () -> Logs_lwt.debug (fun m -> m "Be debugged a bit ?")
>>= fun () -> Logs_lwt.app (fun m -> m "Application console or stdout.")
>>= fun () -> Logs_lwt.info (fun m -> m "Ending main")
>>= fun () -> test_count ()
end
let () = if !Sys.interactive then () else exit (main ())