Source file `alcotest_lwt.ml`

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
(*
 * Copyright (c) 2017 Thomas Gazagnaire <thomas@gazagnaire.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *)

let run_test fn args =
  let async_ex, async_waker = Lwt.wait () in
  let handle_exn ex =
    Logs.debug (fun f -> f "Uncaught async exception: %a" Fmt.exn ex);
    if Lwt.state async_ex = Lwt.Sleep then Lwt.wakeup_exn async_waker ex
  in
  Lwt.async_exception_hook := handle_exn;
  Lwt_switch.with_switch (fun sw -> Lwt.pick [ fn sw args; async_ex ])

module V1 = struct
  module Tester = Alcotest_engine.V1.Cli.Make (Alcotest.Unix_platform) (Lwt)
  include Tester

  let test_case_sync n s f = test_case n s (fun x -> Lwt.return (f x))
  let test_case n s f = test_case n s (run_test f)
end

include V1