Joseph Ferano
3ace7c262f
The mutation pass turned up one defect that did not make the suite go red: a reader branch that forgets to advance reads the same character for ever, and dune test waits as long as it is left to. In CI that is a job killed by the runner with nothing named and no output to read. watchdog.ml puts an alarm on every test binary — generous, because an alarm that fires on a slow machine is a flake — and a five-second one around each read in test_flan, where the budget really is small. The first read that does not return wedges the rest, so a looping reader costs five seconds and names the row instead of costing eight minutes or never finishing. Both were watched: the string-escape loop now fails in five seconds with the case named, and the per-binary backstop was armed short and observed to fire.
92 lines
4.1 KiB
OCaml
92 lines
4.1 KiB
OCaml
(* The Emacs client, against a real daemon and a real running program.
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test_dev.ml proves the daemon answers correctly. This proves the elisp
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actually talks to it, which is not the same claim: the framing is in bytes
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and Emacs counts characters, `beginning-of-defun' has to find a Flan
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top-level form through Flan's own syntax table, and a reply is read with
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`read'. A mistake in any of those passes the OCaml test and fails here.
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Skipped, not failed, where there is no emacs — the compiler does not depend
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on one. *)
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(* The watchdog first: a hang is the one failure mode that reports
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nothing at all. See watchdog.ml. *)
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let () = Watchdog.arm ~seconds:600 "test_emacs"
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let scratch = Filename.get_temp_dir_name ()
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let tmp n = Filename.concat scratch ("flan-emacs-" ^ n)
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let rec await ?(ms = 8000) f =
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if f () then true
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else if ms <= 0 then false
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else begin ignore (Unix.select [] [] [] 0.005); await ~ms:(ms - 5) f end
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let () =
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let have cmd = Sys.command (Printf.sprintf "command -v %s > /dev/null 2>&1" cmd) = 0 in
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if not (have "emacs") then print_endline "emacs: skipped (no emacs on PATH)"
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else if not (have "clang" && have "llc") then
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print_endline "emacs: skipped (no clang or llc on PATH)"
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else begin
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let sock = tmp "dev.sock" and out = tmp "prog.out" in
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List.iter (fun f -> try Sys.remove f with Sys_error _ -> ()) [ sock; out ];
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let fd = Unix.openfile out [ Unix.O_WRONLY; Unix.O_CREAT; Unix.O_TRUNC ] 0o600 in
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let flan = "../bin/main.exe" in
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(* Absolute, because the client starts its own daemon at the end of the run
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and does it from the program's directory rather than from this one. *)
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let flan_abs = try Unix.realpath flan with Unix.Unix_error _ -> flan in
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(* And the program itself, for the same reason: the client starts a daemon
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of its own at the end of the run, and the copy it edits is in a
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temporary directory with no package collections above it. *)
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let program =
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let p = "programs/dev-repl.flan" in
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try Unix.realpath p with Unix.Unix_error _ -> p
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in
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let pid =
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Unix.create_process flan
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[| flan; "dev"; "programs/dev-repl.flan"; "-s"; sock |]
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Unix.stdin fd Unix.stderr
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in
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Unix.close fd;
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if not (await (fun () -> Sys.file_exists sock)) then begin
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print_endline "FAIL the daemon never listened";
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(try Unix.kill pid Sys.sigkill with Unix.Unix_error _ -> ());
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exit 1
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end;
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(* A copy, because the test edits the buffer it sends from. Removed first
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and made writable after: the original comes out of a build directory
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read-only, so copying onto a leftover copy would fail and leave the old
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one in place. *)
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let buf = tmp "buf.flan" in
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(try Sys.remove buf with Sys_error _ -> ());
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ignore
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(Sys.command
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(Printf.sprintf "cp %s %s" (Filename.quote "programs/dev-repl.flan")
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(Filename.quote buf)));
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(try Unix.chmod buf 0o644 with Unix.Unix_error _ -> ());
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let code =
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Sys.command
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(Printf.sprintf
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"emacs -Q --batch -L ../../../emacs -l ../../../emacs/test-flan-dev.el \
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-- %s %s %s %s 2>&1"
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(Filename.quote sock) (Filename.quote buf) (Filename.quote flan_abs)
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(Filename.quote program))
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in
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(* The client disconnects at the end, which is what ends the daemon. If it
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did not get that far — because it failed — nothing else will, so it is
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stopped here rather than left waiting on a socket nobody will use. *)
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if not (await ~ms:3000 (fun () ->
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match Unix.waitpid [ Unix.WNOHANG ] pid with
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| 0, _ -> false
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| _ -> true
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| exception Unix.Unix_error _ -> true))
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then begin
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(try Unix.kill pid Sys.sigterm with Unix.Unix_error _ -> ());
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(try ignore (Unix.waitpid [] pid) with Unix.Unix_error _ -> ())
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end;
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List.iter (fun f -> try Sys.remove f with Sys_error _ -> ()) [ sock; out; buf ];
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if code = 0 then print_endline "emacs: all tests passed"
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else begin
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Printf.printf "\nemacs client exited %d\n" code;
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exit 1
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end
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end
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