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(* This file is part of Lwt, released under the MIT license. See LICENSE.md for
details, or visit https://github.com/ocsigen/lwt/blob/master/LICENSE.md. *)
open Test
open Lwt.Infix
(* Note: due to the time delays in the tests of this suite, it could really
benefit from an option to run tests in parallel. *)
let suite = suite "Lwt_timeout" [
test "basic" begin fun () ->
let p, r = Lwt.wait () in
let start_time = Unix.gettimeofday () in
let timeout =
Lwt_timeout.create 1 (fun () ->
let delta = Unix.gettimeofday () -. start_time in
Lwt.wakeup_later r delta)
in
Lwt_timeout.start timeout;
p >|= fun delta ->
instrument (delta >= 2. && delta < 3.)
"Lwt_timeout: basic: %f %f" start_time delta
(* The above is a bug of the current implementation: it always gives too
long a timeout. *)
end;
test "not started" begin fun () ->
let p, r = Lwt.wait () in
Lwt_timeout.create 1 (fun () ->
Lwt.wakeup_later r false)
|> ignore;
Lwt.async (fun () ->
Lwt_unix.sleep 3. >|= fun () ->
Lwt.wakeup_later r true);
p
end;
test "double start" begin fun () ->
let completions = ref 0 in
let timeout =
Lwt_timeout.create 1 (fun () ->
completions := !completions + 1)
in
Lwt_timeout.start timeout;
Lwt_timeout.start timeout;
Lwt_unix.sleep 3. >|= fun () ->
instrument (!completions = 1) "Lwt_timeout: double start: %i" !completions
end;
test "restart" begin fun () ->
let p, r = Lwt.wait () in
let completions = ref 0 in
(* A dummy timeout, just to set up the reference. *)
let timeout = ref (Lwt_timeout.create 1 ignore) in
timeout :=
Lwt_timeout.create 1 (fun () ->
completions := !completions + 1;
if !completions < 2 then
Lwt_timeout.start !timeout
else
Lwt.wakeup_later r true);
Lwt_timeout.start !timeout;
p
end;
test "stop" begin fun () ->
let p, r = Lwt.wait () in
let timeout =
Lwt_timeout.create 1 (fun () ->
Lwt.wakeup_later r false)
in
Lwt_timeout.start timeout;
Lwt_timeout.stop timeout;
Lwt.async (fun () ->
Lwt_unix.sleep 3. >|= fun () ->
Lwt.wakeup_later r true);
p
end;
test "stop when not stopped" begin fun () ->
Lwt_timeout.create 1 ignore
|> Lwt_timeout.stop;
Lwt.return_true
end;
test "invalid delay" begin fun () ->
try
ignore (Lwt_timeout.create 0 ignore);
Lwt.return_false
with Invalid_argument _ ->
Lwt.return_true
end;
test "change" begin fun () ->
let p, r = Lwt.wait () in
let start_time = Unix.gettimeofday () in
let timeout =
Lwt_timeout.create 5 (fun () ->
let delta = Unix.gettimeofday () -. start_time in
Lwt.wakeup_later r delta)
in
Lwt_timeout.change timeout 1;
Lwt_timeout.start timeout;
p >|= fun delta ->
instrument (delta >= 1.9 && delta < 3.1)
"Lwt_timeout: change: %f %f" start_time delta
end;
test "change does not start" begin fun () ->
let p, r = Lwt.wait () in
let timeout =
Lwt_timeout.create 1 (fun () ->
Lwt.wakeup_later r false)
in
Lwt_timeout.change timeout 1;
Lwt.async (fun () ->
Lwt_unix.sleep 3. >|= fun () ->
Lwt.wakeup_later r true);
p
end;
test "change after start" begin fun () ->
let p, r = Lwt.wait () in
let start_time = Unix.gettimeofday () in
let timeout =
Lwt_timeout.create 5 (fun () ->
let delta = Unix.gettimeofday () -. start_time in
Lwt.wakeup_later r delta)
in
Lwt_timeout.start timeout;
Lwt_timeout.change timeout 1;
p >|= fun delta ->
instrument (delta >= 1.9 && delta < 3.1)
"Lwt_timeout: change after start: %f %f" start_time delta
end;
test "change: invalid delay" begin fun () ->
let timeout = (Lwt_timeout.create 1 ignore) in
try
Lwt_timeout.change timeout 0;
Lwt.return_false
with Invalid_argument _ ->
Lwt.return_true
end;
test ~sequential:true "exception in action" begin fun () ->
let p, r = Lwt.wait () in
Test.with_async_exception_hook
(fun exn ->
match exn with
| Exit -> Lwt.wakeup_later r true
| _ -> raise exn)
(fun () ->
Lwt_timeout.create 1 (fun () -> raise Exit)
|> Lwt_timeout.start;
p)
end;
test "set_exn_handler" begin fun () ->
let p, r = Lwt.wait () in
Lwt_timeout.set_exn_handler (fun exn ->
match exn with
| Exit -> Lwt.wakeup_later r true
| _ -> raise exn);
Lwt_timeout.create 1 (fun () -> raise Exit)
|> Lwt_timeout.start;
p >|= fun result ->
Lwt_timeout.set_exn_handler (fun exn ->
!Lwt.async_exception_hook exn);
result
end;
test "two" begin fun () ->
let p1, r1 = Lwt.wait () in
let p2, r2 = Lwt.wait () in
let start_time = Unix.gettimeofday () in
Lwt_timeout.create 1 (fun () ->
let delta = Unix.gettimeofday () -. start_time in
Lwt.wakeup r1 delta)
|> Lwt_timeout.start;
Lwt_timeout.create 2 (fun () ->
let delta = Unix.gettimeofday () -. start_time in
Lwt.wakeup r2 delta)
|> Lwt_timeout.start;
p1 >>= fun delta1 ->
p2 >|= fun delta2 ->
instrument (delta1 >= 1.9 && delta1 < 3. && delta2 >= 2.9 && delta2 < 4.)
"Lwt_timeout: two: %f %f %f" start_time delta1 delta2
end;
test "simultaneous" begin fun () ->
let p1, r1 = Lwt.wait () in
let p2, r2 = Lwt.wait () in
let start_time = Unix.gettimeofday () in
Lwt_timeout.create 1 (fun () ->
let delta = Unix.gettimeofday () -. start_time in
Lwt.wakeup r1 delta)
|> Lwt_timeout.start;
Lwt_timeout.create 1 (fun () ->
let delta = Unix.gettimeofday () -. start_time in
Lwt.wakeup r2 delta)
|> Lwt_timeout.start;
p1 >>= fun delta1 ->
p2 >|= fun delta2 ->
instrument (delta1 >= 1. && delta1 < 2.6 && delta2 >= 1. && delta2 < 2.6)
"Lwt_timeout: simultaneous: %f %f %f" start_time delta1 delta2
end;
test "two, first stopped" begin fun () ->
let p1, r1 = Lwt.wait () in
let p2, r2 = Lwt.wait () in
let start_time = Unix.gettimeofday () in
let timeout1 =
Lwt_timeout.create 1 (fun () ->
Lwt.wakeup r1 false)
in
Lwt_timeout.start timeout1;
Lwt_timeout.create 2 (fun () ->
let delta = Unix.gettimeofday () -. start_time in
Lwt.wakeup r2 delta)
|> Lwt_timeout.start;
Lwt_timeout.stop timeout1;
Lwt.async (fun () ->
Lwt_unix.sleep 3. >|= fun () ->
Lwt.wakeup r1 true);
p1 >>= fun timeout1_not_fired ->
p2 >|= fun delta2 ->
instrument (timeout1_not_fired && delta2 >= 1.5 && delta2 < 3.5)
"Lwt_timeout: two, first stopped: %b %f %f"
timeout1_not_fired start_time delta2
end;
]
|
