Joseph Ferano
5791faee4e
Finishes DISCUSS.md §9's `pause` marking: the daemon half was already built, this is the editor half plus the one daemon path it was missing. `C-u C-c C-c` marks the form point is inside, `C-u C-u C-c C-c` the top-level form (stop on entry), `C-u C-x C-e` the expression before point. The buffer is never edited — the position rides beside the code and the `(pause)` call goes into the tree after parsing, so no source location moves. `C-x C-e`'s path needed the daemon: its 5s `wait` answered "the program did not reach a frame boundary", which is exactly what a thunk parked at a breakpoint looks like from out here. `wait` is now three-way and asks `state t = Stopped` only when a pause was requested, so the no-pause shape `test_dev.ml` pins is unchanged. The overlay is an annotation and not feedback, so unlike an error marker it survives `pre-command-hook`; what takes it down is an accepted evaluation with no `:pause` on it, which is the same thing that takes the mark itself down. Tests: a `test_dev.ml` block over the new `dev-pause.flan` that marks, stops, re-evaluates plainly and then polls half a second confirming it does not stop again — one sample after `continue` proves nothing, the resumed frame is still in the old body — and an `emacs/test-flan-dev.el` block for which form a prefix picks, the byte column, the overlay's lifetime, and one live round trip.
956 lines
51 KiB
EmacsLisp
956 lines
51 KiB
EmacsLisp
;;; test-flan-dev.el --- Drive the client against a running program -*- lexical-binding: t; -*-
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;; Run as: emacs -Q --batch -L emacs -l emacs/test-flan-dev.el -- <socket> <flan-file>
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;;
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;; This is the client half of test_dev.ml. The OCaml test proves the daemon
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;; answers correctly; this proves the elisp actually talks to it — the framing,
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;; the reply reader, and C-c C-c picking the right form out of a buffer. A
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;; protocol bug that only shows up under Emacs' coding systems would pass the
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;; OCaml test and fail here, which is the whole reason it exists.
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;;; Code:
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(require 'flan-mode)
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(require 'flan-dev)
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(require 'flan-repl)
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(require 'flan-watch)
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(defvar test-flan--failures 0)
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(defmacro test-flan--said (&rest body)
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"Run BODY and return the last thing it put in the echo area.
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`current-message' is nil under --batch, so the echo area is watched where it
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is written instead — the real `message' call the real command makes."
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`(let* ((said nil)
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(probe (lambda (fmt &rest args)
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(when fmt (setq said (apply #'format fmt args))))))
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(advice-add 'message :before probe)
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(unwind-protect (progn ,@body)
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(advice-remove 'message probe))
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said))
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(defun test-flan--check (name ok)
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(if ok (message " ok %s" name)
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(setq test-flan--failures (1+ test-flan--failures))
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(message " FAIL %s" name)))
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(let* ((args (cdr (member "--" command-line-args)))
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(socket (nth 0 args))
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(file (nth 1 args))
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(flan (nth 2 args))
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;; The buffer above is a copy in a temporary directory; this is the
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;; program where it actually lives, which is the one a second daemon
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;; can be started on — an `import' is resolved from the importing
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;; file's own directory, and a copy in /tmp has no packages above it.
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(program (nth 3 args)))
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(find-file file)
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;; The copy comes out of a build directory, so it may arrive read-only.
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;; Set the flag directly: `read-only-mode' asks about the file on disk, and
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;; a question in a batch run is a hang waiting to happen.
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(setq buffer-read-only nil)
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(test-flan--check "flan-mode is on for a .flan file" (eq major-mode 'flan-mode))
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(test-flan--check "the modeline says so before connecting"
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(and (eq (flan-dev-state) 'off)
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(string-match-p "off" (flan-dev-mode-line))))
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(flan-connect socket)
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(test-flan--check "connected" (process-live-p flan-dev--connection))
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(test-flan--check "the modeline says a program is there"
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(and (eq (flan-dev-state) 'live)
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(string-match-p "live" (flan-dev-mode-line))))
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(test-flan--check "and says nothing in a buffer that is not Flan's"
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(with-temp-buffer (null (flan-dev-mode-line))))
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;; Buffer-locally, so that someone who loads this and never opens a .flan
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;; file is not evaluating it on every redisplay of every buffer they have.
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(test-flan--check "the indicator is in this buffer's modeline"
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(member '(:eval (flan-dev-mode-line)) mode-line-misc-info))
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(test-flan--check "and not in everyone else's"
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(with-temp-buffer
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(not (member '(:eval (flan-dev-mode-line))
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mode-line-misc-info))))
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;; A daemon restarted while Emacs was not looking is the ordinary case. The
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;; socket outlives this connection, so dropping the process and asking again
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;; is the same situation the client meets after a restart, and it must come
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;; back rather than fail.
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(delete-process flan-dev--connection)
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(test-flan--check "a dead connection reads as lost, not as never-connected"
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(and (eq (flan-dev-state) 'lost)
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(string-match-p "lost" (flan-dev-mode-line))))
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(let ((r (flan-dev--request '(:op "describe"))))
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(test-flan--check "the next request reconnects on its own"
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(and (process-live-p flan-dev--connection)
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(member "step" (plist-get r :fns)))))
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;; ...and knows the program's names again. An empty cache after a reconnect
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;; is honest but silent: eldoc goes quiet and M-. falls through to another
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;; backend, with nothing said about why.
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(test-flan--check "and knows the program's names again"
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(assoc "step" flan-dev--defs))
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;; But a socket nobody is listening on is refused by name, rather than
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;; retried forever or reported as some other failure.
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(let ((flan-dev--connection nil)
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(flan-dev--socket "/nonexistent/flan-dev-not-here.sock")
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(raised nil))
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(condition-case err (flan-dev--request '(:op "describe"))
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(error (setq raised (error-message-string err))))
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(test-flan--check "a socket that is gone is refused by name"
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(and raised
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(string-match-p "flan-dev-not-here.sock" raised)
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(string-match-p "nothing is listening" raised))))
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(let ((r (flan-dev--request '(:op "describe"))))
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(test-flan--check "describe lists the program's functions"
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(member "step" (plist-get r :fns)))
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(test-flan--check "describe lists the program's globals"
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(member "ticks" (plist-get r :globals))))
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;; `layout' against the real daemon, through `flan-cnr-layout', which is how
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;; the conditions buffer gets it. The reply is the first one with a list of
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;; lists in it, so `read' on this side is doing something it does nowhere
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;; else — and the daemon answers it without asking the program anything.
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(require 'flan-cnr)
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(let ((flan-cnr-request-function #'flan-dev--request))
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(test-flan--check "a struct's fields come back named and typed"
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(equal (flan-cnr-layout "Missing") '(("id" "i32" nil))))
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(test-flan--check "and a type the daemon cannot place is nil, not an error"
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(null (flan-cnr-layout "Nonesuch"))))
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;; C-c C-c on the form at point: put point inside `step' and send it. The
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;; text comes from the buffer, so this exercises `beginning-of-defun' against
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;; Flan's own syntax table as much as it does the wire.
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(goto-char (point-min))
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(search-forward "(defn step")
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(goto-char (match-beginning 0))
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(save-excursion
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(search-forward "(+ ticks 1)")
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(replace-match "(+ ticks 41)"))
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(let ((form (flan-dev--defun-at-point)))
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(test-flan--check "the form at point is the defn"
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(and (string-prefix-p "(defn step" (string-trim form))
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(string-match-p "41" form))))
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(flan-eval-defun)
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;; And an error: the daemon answers with a location, the client raises.
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(let ((raised nil))
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(condition-case err
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(flan-dev--eval "(defn step [] i64 nonsense)" "form")
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(user-error (setq raised (error-message-string err))))
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(test-flan--check "a form that does not check is reported"
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(and raised (string-match-p "unknown name" raised))))
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;; The :loc column is a *byte* offset — lib/reader.ml walks the source a byte
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;; at a time — and Emacs counts characters. Same rule as the framing, a
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;; different place to get it wrong, and it shows up only for someone whose
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;; comments or identifiers are not ASCII.
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(with-temp-buffer
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(insert ";; héllo\n(defn wörld [] i64 nonsense)\n")
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(let ((want (save-excursion
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(goto-char (point-min))
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(search-forward "nonsense")
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(match-beginning 0)))
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(eol (save-excursion (goto-char (point-min)) (line-end-position))))
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(test-flan--check "a byte column lands on the right character"
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(= (flan-dev--position
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2 (1+ (string-bytes "(defn wörld [] i64 ")))
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want))
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(test-flan--check "a column past the end of a line is clamped to it"
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(= (flan-dev--position 1 500) eol))))
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;; A rejected form is marked where it is, not only in the echo area. The
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;; daemon numbers lines from the start of what it was sent, so a form taken
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;; from the middle of a buffer only lands on the right line because the
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;; client pads it back into place before sending.
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(goto-char (point-min))
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(search-forward "(defn step")
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(goto-char (match-beginning 0))
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(let ((defn-line (line-number-at-pos)))
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(save-excursion
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(search-forward "(+ ticks 41)")
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(replace-match "(+ ticks nonsense)"))
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(ignore-errors (flan-eval-defun))
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(let ((ovs (seq-filter (lambda (o) (overlay-get o 'flan-dev-error))
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(overlays-in (point-min) (point-max)))))
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(test-flan--check "a rejected form gets exactly one error overlay"
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(= 1 (length ovs)))
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(test-flan--check "the overlay is at the form, not at line 1"
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(and ovs (>= (line-number-at-pos (overlay-start (car ovs)))
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defn-line)))
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(test-flan--check "the overlay carries the daemon's reason"
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(and ovs
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(string-match-p
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"unknown name"
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(or (overlay-get (car ovs) 'help-echo) ""))))
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(test-flan--check "and shows it beside the code"
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(and ovs
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(string-match-p
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"unknown name"
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(or (overlay-get (car ovs) 'after-string) "")))))
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;; ...and it goes away when the next evaluation is accepted. A marker left
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;; behind after a fix is a lie about the running program. Point moved to
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;; the error, which is the point of all this, so start the search over.
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(goto-char (point-min))
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(search-forward "(+ ticks nonsense)")
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(replace-match "(+ ticks 41)")
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(search-backward "(defn step")
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;; A silent success is indistinguishable from a silent failure, so an
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;; accepted evaluation says what landed in the running program and what it
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;; cost. The name comes from the *reply*: the daemon is the one that knows
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;; which names it installed.
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(let ((said (test-flan--said (flan-eval-defun))))
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(test-flan--check "an accepted evaluation clears it"
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(null (seq-filter (lambda (o) (overlay-get o 'flan-dev-error))
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(overlays-in (point-min) (point-max)))))
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(test-flan--check "and says which name landed"
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(and said (string-match-p "\\_<step\\_>" said)))
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(test-flan--check "and how long it took"
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(and said (string-match-p "[0-9]+ ms" said)))))
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;; A declaration the program already has installs nothing, and must say so
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;; rather than reporting a time for a build that did not happen.
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(let ((said (test-flan--said
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(flan-dev--eval "(defvar ticks i64)" "form"))))
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(test-flan--check "an evaluation with nothing to install says so"
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(and said (string-match-p "nothing to install" said)
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(not (string-match-p "installed" said)))))
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;; Many names are counted and sampled. An echo area truncated in the middle
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;; of the tenth name says neither how many there were nor which.
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(test-flan--check "a long list of names is counted, not cut off"
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(equal (flan-dev--names-phrase
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'("a" "b" "c" "d" "e" "f") "fallback")
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"6 names (a, b, c, d, …)"))
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(test-flan--check "a short one is just named"
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(equal (flan-dev--names-phrase '("a" "b") "fallback") "a, b"))
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;; `defs' is what eldoc, completion and M-. all read. One op answering all
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;; three, cached, because eldoc fires on an idle timer and completion inside
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;; redisplay, and neither may block on a socket.
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(test-flan--check "the program's names are known"
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(assoc "step" flan-dev--defs))
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(test-flan--check "with a signature"
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(equal (nth 2 (assoc "step" flan-dev--defs)) "step [] i64"))
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(test-flan--check "a global is known, and says it is one"
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(equal (nth 1 (assoc "ticks" flan-dev--defs)) "var"))
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(test-flan--check "so is an imported package's extern"
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(let ((d (assoc "agent/wait-raw" flan-dev--defs)))
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(and d (equal (nth 1 d) "extern"))))
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;; `step' was last installed from this buffer, so that is where the daemon
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;; says it is — which is also the check that the client's line padding put it
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;; on the line it is really on rather than on line 1.
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(test-flan--check "a fn carries where it is written"
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(equal (nth 3 (assoc "step" flan-dev--defs))
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(format "%s:%d:7" buffer-file-name
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(save-excursion
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(goto-char (point-min))
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(search-forward "(defn step")
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(line-number-at-pos)))))
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;; eldoc: the signature of the name at point, and of the form point is
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;; inside, which is what you want while typing arguments.
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(goto-char (point-min))
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(search-forward "(set ticks (step")
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(let ((said nil))
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(test-flan--check "eldoc answers for the name at point"
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(and (flan-dev-eldoc-function
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(lambda (s &rest _) (setq said s)))
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said (string-match-p "step \\[\\] i64" said))))
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(let ((said nil))
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(save-excursion
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(goto-char (point-min))
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(search-forward "(set ticks (step)")
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(backward-char 1) ; inside (step ...), not on the name
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(flan-dev-eldoc-function (lambda (s &rest _) (setq said s))))
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(test-flan--check "and for the form point is inside"
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(and said (string-match-p "step" said))))
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(let ((said nil))
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(with-temp-buffer
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(insert "not-a-flan-name")
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(flan-dev-eldoc-function (lambda (s &rest _) (setq said s))))
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(test-flan--check "and says nothing about a name the program has not got"
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(null said)))
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;; Completion: the running program's names, through `completion-at-point'.
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(goto-char (point-min))
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(search-forward "(defn step")
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(let* ((capf (flan-dev-completion-at-point))
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(table (nth 2 capf)))
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(test-flan--check "completion offers the program's own names"
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(member "step" (all-completions "ste" table)))
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(test-flan--check "and the names an import brought in"
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(member "agent/wait" (all-completions "agent/" table)))
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(test-flan--check "and annotates each with what it is"
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(equal (funcall (plist-get (nthcdr 3 capf)
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:annotation-function)
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"ticks")
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" var")))
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;; M-. through xref, so it is the key it always is.
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(let ((xs (xref-backend-definitions 'flan "step"))
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(line (save-excursion (goto-char (point-min))
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(search-forward "(defn step")
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(line-number-at-pos))))
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(test-flan--check "M-. finds where a function is written"
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(and (= 1 (length xs))
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(let ((l (xref-item-location (car xs))))
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(and (file-equal-p (xref-location-group l)
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buffer-file-name)
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(= (xref-location-line l) line))))))
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;; And the two things it cannot do, refused by name with the reason rather
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;; than by opening an empty buffer.
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(let ((raised nil))
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(condition-case err (xref-backend-definitions 'flan "ticks")
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(user-error (setq raised (error-message-string err))))
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(test-flan--check "M-. on a global refuses, saying why"
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(and raised (string-match-p "ticks" raised)
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(string-match-p "no location" raised))))
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(let ((raised nil))
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(condition-case err (xref-backend-definitions 'flan "rand-seed")
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(user-error (setq raised (error-message-string err))))
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(test-flan--check "M-. into the prelude refuses, saying why"
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(and raised (string-match-p "prelude" raised)
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(string-match-p "not a file on disk" raised))))
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(let ((raised nil))
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(condition-case err (xref-backend-definitions 'flan "no-such-name")
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(user-error (setq raised (error-message-string err))))
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(test-flan--check "and so does a name the program does not have"
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(and raised (string-match-p "no no-such-name" raised))))
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;; A name installed now must complete now, not after the next connect.
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(flan-dev--eval "(defn freshly-added [] i64 7)" "form")
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(test-flan--check "a name just installed is known immediately"
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(equal (nth 2 (assoc "freshly-added" flan-dev--defs))
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"freshly-added [] i64"))
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;; The session is not poisoned by that: a good form still lands.
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(flan-dev--eval "(defn step [] i64 (set ticks (+ ticks 100)) ticks)" "form")
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;; The program's own output arrives on replies and lands in its buffer, so
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;; a long-running program is not writing into a terminal nobody is watching.
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(flan-dev--eval "(defn step [] i64 (do (println \"HELLO\") ticks))" "form")
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(let ((seen nil) (deadline (+ (float-time) 10)))
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(while (and (not seen) (< (float-time) deadline))
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(ignore-errors (flan-dev--request '(:op "describe")))
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(setq seen (with-current-buffer (get-buffer-create flan-dev-output-buffer)
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(string-match-p "HELLO" (buffer-string)))))
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(test-flan--check "the program's output reaches its buffer" seen))
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;; The REPL buffer: typed input goes through the same eval-expr request, and
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;; the value lands at the prompt while the program's own output goes to
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;; *flan-output*. Conflating those two is the bug worth testing for.
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(test-flan--check "an incomplete form is not sent"
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(not (flan-repl--complete-p "(+ 1")))
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(test-flan--check "a whole form is sent" (flan-repl--complete-p "(+ 1 2)"))
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(test-flan--check "a paren in a string does not count"
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(not (flan-repl--complete-p "(f \"(\"")))
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(flan-repl)
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(with-current-buffer flan-repl-buffer
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(goto-char (point-max))
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(insert "(+ 20 3)")
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(flan-repl-return)
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(let ((deadline (+ (float-time) 15)))
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(while (and (not (string-match-p "23" (buffer-string)))
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(< (float-time) deadline))
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(accept-process-output nil 0.05)))
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(test-flan--check "the REPL shows a value"
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(string-match-p "23" (buffer-string)))
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(goto-char (point-max))
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(insert "no-such-thing")
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(flan-repl-return)
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(let ((deadline (+ (float-time) 15)))
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(while (and (not (string-match-p "unknown name" (buffer-string)))
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(< (float-time) deadline))
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(accept-process-output nil 0.05)))
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(test-flan--check "the REPL shows an error"
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(string-match-p "unknown name" (buffer-string)))
|
|
;; A value and the program's output travel by different routes: the value
|
|
;; is the result of the request, the output rides along with the reply.
|
|
;; Showing them in one place would be convenient and wrong.
|
|
(goto-char (point-max))
|
|
(insert "(println \"PRINTED\")")
|
|
(flan-repl-return)
|
|
(let ((deadline (+ (float-time) 15)))
|
|
(while (and (not (with-current-buffer flan-dev-output-buffer
|
|
(string-match-p "PRINTED" (buffer-string))))
|
|
(< (float-time) deadline))
|
|
(ignore-errors (flan-dev--request '(:op "describe")))
|
|
(accept-process-output nil 0.05)))
|
|
(test-flan--check "printed text goes to the output buffer"
|
|
(with-current-buffer flan-dev-output-buffer
|
|
(string-match-p "PRINTED" (buffer-string))))
|
|
;; ...and the prompt got the *value*, which for a call made for its effect
|
|
;; is Unit. The text it printed is not the value and does not belong here.
|
|
(test-flan--check "and the prompt got the value, not the text"
|
|
(string-match-p "()" (buffer-string))))
|
|
|
|
;; ── The break loop ────────────────────────────────────────────────────
|
|
;;
|
|
;; An unhandled `error' stops the program on the frame that erred instead of
|
|
;; killing it, and this is the half of that an editor sees: it has to notice
|
|
;; without being told, say what stopped it, offer the restarts, and keep
|
|
;; working while the program sits there. Last in this file because the
|
|
;; program is left running afterwards but its `step' has been through a
|
|
;; break, and nothing above should have to reason about that.
|
|
|
|
;; Refused while it is running, by name. There is no restart stack to walk
|
|
;; from a running program, and an empty prompt would be worse than a refusal.
|
|
(let ((raised nil))
|
|
(condition-case err (flan-break)
|
|
(user-error (setq raised (error-message-string err))))
|
|
(test-flan--check "the prompt refuses while the program is running"
|
|
(and raised (string-match-p "running" raised))))
|
|
|
|
;; The poll is a real timer, registered on connect. What it *does* is
|
|
;; checked below by calling it; that it is scheduled at all is checked here,
|
|
;; because a background discovery that nothing ever runs discovers nothing.
|
|
(test-flan--check "a poll timer is running"
|
|
(and (timerp flan-dev--timer)
|
|
(eq (timer--function flan-dev--timer) #'flan-dev--poll)))
|
|
|
|
;; Break it: `step' is called every time round the program's loop, so a body
|
|
;; that errors stops it on its own game thread, in a frame of its own — not
|
|
;; inside anything this client asked for. Nothing tells Emacs.
|
|
(flan-dev--eval
|
|
"(defn step [] i64 (restart-case (do (error (Missing {.id 7})) 0) (use-placeholder [] -1)))"
|
|
"form")
|
|
(let ((deadline (+ (float-time) 20)))
|
|
(while (and (not flan-dev--stopped) (< (float-time) deadline))
|
|
(flan-dev--poll)
|
|
(accept-process-output nil 0.05)))
|
|
(test-flan--check "the client notices a stop nobody asked about"
|
|
(equal flan-dev--stopped "Missing"))
|
|
(test-flan--check "and the modeline says so, with the condition"
|
|
(and (eq (flan-dev-state) 'stopped)
|
|
(string-match-p "stopped" (flan-dev-mode-line))
|
|
(string-match-p "Missing" (flan-dev-mode-line))))
|
|
|
|
;; What the prompt would offer. `completing-read' is not driven here — a
|
|
;; minibuffer in a batch run is a hang waiting to happen — so the list it
|
|
;; reads and the two commands it dispatches to are exercised instead.
|
|
(test-flan--check "the restarts on offer are the ones the frame declared"
|
|
(equal (flan-dev-restarts) '("use-placeholder")))
|
|
|
|
;; And what it would put in front of someone. The labels carry the position,
|
|
;; because the position is what gets chosen: two frames may offer the same
|
|
;; name and only a number can say which one. A pure function over a reply,
|
|
;; so it is checked against the shapes a real daemon cannot easily be made to
|
|
;; produce as well as against the one it just did.
|
|
(test-flan--check "the prompt numbers what it offers"
|
|
(equal (flan-dev--restart-candidates '("use-placeholder") nil)
|
|
'(("0. use-placeholder" . 0))))
|
|
(test-flan--check "a shadowed name is two distinguishable choices"
|
|
(equal (mapcar #'cdr
|
|
(flan-dev--restart-candidates
|
|
'("retry" "use-placeholder" "retry") nil))
|
|
'(0 1 2)))
|
|
(test-flan--check "a restart below the break is shown, and shown as such"
|
|
(let ((table (flan-dev--restart-candidates
|
|
'("retry" "use-placeholder") '(1))))
|
|
(and (not (string-match-p "cannot be taken" (caar table)))
|
|
(string-match-p "cannot be taken" (car (nth 1 table)))
|
|
(equal (cdr (nth 1 table)) 1))))
|
|
|
|
;; The payoff. The break loop *is* the poll loop, so an expression sent now
|
|
;; runs on the stopped thread and comes back — which is the one moment
|
|
;; anybody actually wants C-x C-e to work.
|
|
(goto-char (point-max))
|
|
(let ((beg (point)))
|
|
(insert "\n(+ 20 3)")
|
|
(let ((said (test-flan--said (flan-eval-last-sexp))))
|
|
(test-flan--check "C-x C-e works while the program is stopped"
|
|
(and said (string-match-p "23" said))))
|
|
(delete-region beg (point-max)))
|
|
|
|
;; And installing, which the break loop allows on purpose: there is no frame
|
|
;; in progress, so the rule against swapping a body that is on the stack does
|
|
;; not apply. This is the fix-it-and-retry loop — the broken `step' is
|
|
;; replaced here, and the resume below returns into the old one for the last
|
|
;; time before every later call reaches the new body through its cell.
|
|
(let ((said (test-flan--said
|
|
(flan-dev--eval "(defn step [] i64 (set ticks (+ ticks 1)) ticks)"
|
|
"form"))))
|
|
(test-flan--check "a fix installs while the program is stopped"
|
|
(and said (string-match-p "\\_<step\\_>" said))))
|
|
|
|
;; Choosing one. "ok" from the daemon means accepted — the stopped thread
|
|
;; takes it on its next pass — so the client stops claiming a break and lets
|
|
;; the next poll settle it.
|
|
;; By position, which is the path `C-c C-b' takes: the name goes with it as
|
|
;; the receipt the program checks, not as the lookup.
|
|
(flan-dev-restart-at 0 "use-placeholder")
|
|
(let ((deadline (+ (float-time) 20)))
|
|
(while (and (not (eq (flan-dev-state) 'live)) (< (float-time) deadline))
|
|
(flan-dev--poll)
|
|
(accept-process-output nil 0.05)))
|
|
(test-flan--check "choosing a restart resumes the program"
|
|
(and (null flan-dev--stopped)
|
|
(eq (flan-dev-state) 'live)))
|
|
|
|
;; ...and the client is an ordinary client again on the far side of it.
|
|
(goto-char (point-max))
|
|
(let ((beg (point)))
|
|
(insert "\n(+ 1 1)")
|
|
(let ((said (test-flan--said (flan-eval-last-sexp))))
|
|
(test-flan--check "and everything works again afterwards"
|
|
(and said (string-match-p "2" said))))
|
|
(delete-region beg (point-max)))
|
|
|
|
;; ── The documentation buffer ──────────────────────────────────────────
|
|
;;
|
|
;; The same four facts `defs' carries, in a buffer: eldoc answers while you
|
|
;; are typing, and a signature in the echo area is gone the moment you do
|
|
;; anything else. Run before the disconnect below, because it reads the
|
|
;; running program.
|
|
(flan-doc "step")
|
|
(with-current-buffer flan-doc-buffer
|
|
(let ((text (buffer-string)))
|
|
(test-flan--check "the doc buffer names the thing and its signature"
|
|
(and (string-match-p "\\`step" text)
|
|
(string-match-p "step \\[\\] i64" text)))
|
|
(test-flan--check "and says what kind of thing it is"
|
|
(string-match-p "Kind +fn" text))
|
|
))
|
|
;; Where it is written, for a name that has not been re-installed from a
|
|
;; buffer since the daemon built it: `main' is still at the location the
|
|
;; daemon read it from, which is the ordinary case and the one with a
|
|
;; button on it.
|
|
(flan-doc "main")
|
|
(with-current-buffer flan-doc-buffer
|
|
(test-flan--check "and where a definition is written"
|
|
(string-match-p
|
|
(regexp-quote (file-name-nondirectory program))
|
|
(buffer-string))))
|
|
;; A global has no Loc in the Tast, so the buffer says that in the same words
|
|
;; M-. refuses in — rather than leaving the line out, which reads as though
|
|
;; the name had no home at all.
|
|
(flan-doc "ticks")
|
|
(with-current-buffer flan-doc-buffer
|
|
(test-flan--check "a global says why there is no location"
|
|
(string-match-p "no location for a var" (buffer-string))))
|
|
(let ((raised nil))
|
|
(condition-case err (flan-doc "no-such-name")
|
|
(user-error (setq raised (error-message-string err))))
|
|
(test-flan--check "and a name the program has not got is refused"
|
|
(and raised (string-match-p "no no-such-name" raised))))
|
|
|
|
;; ── The watch buffer ──────────────────────────────────────────────────
|
|
;;
|
|
;; test_dev.ml proves the table itself: a program pushes and the daemon reads
|
|
;; it back without compiling anything. What is left to prove here is the
|
|
;; part that is only true in Emacs, and it is not the painting — it is that
|
|
;; an *asynchronous* sender and the ordinary synchronous request can share one
|
|
;; connection.
|
|
;;
|
|
;; The protocol is one reply per request on one socket. The watch timer
|
|
;; sends and does not wait, deliberately, because waiting on a 0.2s timer
|
|
;; stalls the UI. That leaves a reply in flight that the next C-c C-c would
|
|
;; read as its own — an evaluation reporting the watch table's answer, which
|
|
;; is the exact bug `flan-dev-settle-hook' exists to make impossible. This
|
|
;; program writes nothing into the table, which does not matter: the
|
|
;; interleaving is the claim.
|
|
(flan-watch)
|
|
(test-flan--check "the watch buffer opens" (get-buffer flan-watch-buffer))
|
|
(test-flan--check "and the timer is running" flan-watch--timer)
|
|
(test-flan--check "a program that watches nothing says so, rather than looking broken"
|
|
(with-current-buffer flan-watch-buffer
|
|
(string-match-p "nothing is being watched" (buffer-string))))
|
|
;; The tick by hand, so this does not depend on a timer firing inside a batch
|
|
;; run. Two of them: the first sends, the second collects and sends again.
|
|
(flan-watch--tick)
|
|
(test-flan--check "a tick leaves a request in flight rather than waiting for it"
|
|
flan-watch--pending)
|
|
;; And now the interleaving, with a reply outstanding on purpose. If the
|
|
;; settle hook were not there this would return the watch table's plist and
|
|
;; `flan-dev--report' would take its missing :status for a rejection.
|
|
;;
|
|
;; Back in the source buffer first: `flan-doc' and `flan-watch' above both
|
|
;; display buffers of their own, and C-c C-c reads the buffer it is run in.
|
|
(pop-to-buffer (flan-dev--buffer-visiting file))
|
|
(goto-char (point-min))
|
|
(search-forward "(defn step")
|
|
(goto-char (match-beginning 0))
|
|
(let ((said (test-flan--said (flan-eval-defun))))
|
|
(test-flan--check "an eval with a watch reply in flight still gets its own answer"
|
|
(and said (string-match-p "step" said)))
|
|
(test-flan--check "and the watch request was settled, not abandoned"
|
|
(null flan-watch--pending)))
|
|
(flan-watch--tick)
|
|
(flan-watch--tick)
|
|
(test-flan--check "and the buffer keeps painting afterwards"
|
|
(with-current-buffer flan-watch-buffer
|
|
(> (buffer-size) 0)))
|
|
;; Point survives a repaint. This is why `replace-buffer-contents' is used
|
|
;; rather than erase-and-insert: the latter would put the cursor back at the
|
|
;; top of the buffer on every tick, which makes the one thing you want to do
|
|
;; in a watch buffer — look at a line while the program runs — impossible.
|
|
(with-current-buffer flan-watch-buffer
|
|
(goto-char (point-max))
|
|
(let ((where (point)))
|
|
(flan-watch--tick)
|
|
(flan-watch--tick)
|
|
(test-flan--check "and point does not jump to the top on a repaint"
|
|
(= (point) where))))
|
|
(flan-watch-stop)
|
|
(test-flan--check "stopping cancels the timer" (null flan-watch--timer))
|
|
(test-flan--check "and takes the settle hook off with it"
|
|
(not (memq #'flan-watch--settle flan-dev-settle-hook)))
|
|
(kill-buffer flan-watch-buffer)
|
|
|
|
(flan-disconnect)
|
|
(test-flan--check "disconnected" (not (process-live-p flan-dev--connection)))
|
|
(test-flan--check "and the poll timer is cancelled with it"
|
|
(null flan-dev--timer))
|
|
|
|
;; ── Starting the daemon from Emacs ────────────────────────────────────
|
|
;;
|
|
;; Last, and after the disconnect above, because it runs a *second* daemon:
|
|
;; nothing before this should have to reason about which of two programs a
|
|
;; request went to. Its own socket for the same reason — and because
|
|
;; `flan dev' with no -s puts one beside the program, which for a test
|
|
;; program in /tmp is a path shared with every other thing running there.
|
|
(setq flan-dev-command flan)
|
|
(let ((socket2 (concat socket "-started-from-emacs")))
|
|
(ignore-errors (delete-file socket2))
|
|
(test-flan--check "nothing to quit before anything was started"
|
|
(let ((raised nil))
|
|
(condition-case err (flan-dev-quit)
|
|
(user-error (setq raised (error-message-string err))))
|
|
(and raised (string-match-p "no daemon started" raised))))
|
|
(flan-dev program socket2)
|
|
(test-flan--check "M-x flan-dev builds, launches and connects"
|
|
(and (process-live-p flan-dev--daemon)
|
|
(eq (flan-dev-state) 'live)))
|
|
(test-flan--check "and it is the program that was asked for"
|
|
(member "step" (plist-get (flan-dev--request '(:op "describe"))
|
|
:fns)))
|
|
;; Refused rather than silently restarted: a second daemon would take the
|
|
;; first one's program and everything in its memory with it.
|
|
(test-flan--check "a second one is refused while the first is alive"
|
|
(let ((raised nil))
|
|
(condition-case err (flan-dev program socket2)
|
|
(user-error (setq raised (error-message-string err))))
|
|
(and raised (string-match-p "already running" raised))))
|
|
;; The daemon owns the program's lifetime, so quitting has to actually end
|
|
;; the process — not just drop the socket and leave it running.
|
|
;; Restarting the program: for a change the running one cannot take — a
|
|
;; struct whose layout moved — where the answer is a new build, a new
|
|
;; process and the session that compiled it. Proved by what it throws
|
|
;; away: a name installed into the old program is not in the new one.
|
|
(flan-dev--eval "(defn only-in-the-old-program [] i64 1)" "form")
|
|
(test-flan--check "a name installed into the running program is there"
|
|
(assoc "only-in-the-old-program" flan-dev--defs))
|
|
(let ((old flan-dev--daemon))
|
|
(flan-dev-restart-program)
|
|
(test-flan--check "restarting gives a different daemon, connected"
|
|
(and (not (process-live-p old))
|
|
(process-live-p flan-dev--daemon)
|
|
(not (eq old flan-dev--daemon))
|
|
(eq (flan-dev-state) 'live))))
|
|
(test-flan--check "and a program built from source, without the addition"
|
|
(and (assoc "step" flan-dev--defs)
|
|
(null (assoc "only-in-the-old-program"
|
|
flan-dev--defs))))
|
|
|
|
(let ((proc flan-dev--daemon))
|
|
(flan-dev-quit)
|
|
;; The process, not the variable: forgetting a daemon is not stopping
|
|
;; one, and a program left running with nothing attached to it is
|
|
;; exactly what the terminal loop used to leave behind.
|
|
(test-flan--check "quitting ends the daemon"
|
|
(and (not (process-live-p proc))
|
|
(null flan-dev--daemon)
|
|
(not (process-live-p flan-dev--connection))
|
|
(eq (flan-dev-state) 'off)))
|
|
;; The daemon unlinks its socket on the way out, so this is the same
|
|
;; claim seen from the other side.
|
|
(test-flan--check "and takes its socket with it"
|
|
(not (file-exists-p socket2))))
|
|
(ignore-errors (delete-file socket2)))
|
|
|
|
;; A program that does not exist is refused here rather than by a daemon
|
|
;; that starts, fails to build and exits — which looks the same from a
|
|
;; distance and takes a compile to find out.
|
|
(test-flan--check "a file that is not there is refused before anything starts"
|
|
(let ((raised nil))
|
|
(condition-case err (flan-dev "/nonexistent/nope.flan")
|
|
(user-error (setq raised (error-message-string err))))
|
|
(and raised (string-match-p "no such file" raised))))
|
|
|
|
;; ── Navigating a file ─────────────────────────────────────────────────
|
|
;;
|
|
;; No daemon in any of this: imenu and which-function read the buffer, which
|
|
;; is the point — they work on a file nobody has run yet, and they keep
|
|
;; working when the program is stopped or gone.
|
|
(with-temp-buffer
|
|
(insert ";;;; A file with one of everything.\n"
|
|
"(defstruct Missing [id i32])\n"
|
|
"(defvar ticks i64)\n"
|
|
"(defconst limit i64 10)\n"
|
|
"(declare later [] i64)\n"
|
|
"(defn step [] i64\n"
|
|
" (let [x 1]\n"
|
|
" (defn not-top-level [] i64 2)\n"
|
|
" (+ ticks x)))\n")
|
|
(flan-mode)
|
|
(let* ((index (imenu--make-index-alist))
|
|
(group (lambda (name) (cdr (assoc name index)))))
|
|
(test-flan--check "imenu finds a function, where it is written"
|
|
(equal (marker-position
|
|
(cdr (assoc "step" (funcall group "Functions"))))
|
|
(save-excursion (goto-char (point-min))
|
|
(search-forward "(defn step")
|
|
(match-beginning 0))))
|
|
(test-flan--check "and a struct, under its own heading"
|
|
(assoc "Missing" (funcall group "Types")))
|
|
(test-flan--check "and both kinds of global"
|
|
(and (assoc "ticks" (funcall group "Variables"))
|
|
(assoc "limit" (funcall group "Variables"))))
|
|
;; A forward declaration is not a definition; listing it beside one
|
|
;; would show the same name twice with nothing to tell them apart.
|
|
(test-flan--check "and a declaration, said to be one"
|
|
(and (assoc "later" (funcall group "Declared"))
|
|
(null (assoc "later" (funcall group "Functions")))))
|
|
;; A `defn' inside a `let' defines nothing at the top level, and the
|
|
;; index is anchored at column 0 so that it cannot offer one.
|
|
(test-flan--check "and nothing that is not a top-level form"
|
|
(null (assoc "not-top-level" (funcall group "Functions")))))
|
|
;; which-function: the case is a long body scrolled past its own header.
|
|
(goto-char (point-min))
|
|
(search-forward "(+ ticks x)")
|
|
(test-flan--check "which-function names the definition point is in"
|
|
(equal (flan-current-defun-name) "step"))
|
|
(goto-char (point-min))
|
|
(test-flan--check "and says nothing above the first one"
|
|
(null (flan-current-defun-name))))
|
|
|
|
;; ── A rejection lasts as long as the action it was about ──────────────
|
|
;;
|
|
;; The overlay is feedback on the evaluation that just failed, so the next
|
|
;; command in that buffer takes it down. What is checked here is the
|
|
;; mechanism and not Emacs' command loop: `execute-kbd-macro' under --batch
|
|
;; runs no `pre-command-hook' at all (and does not even move point), so there
|
|
;; is no way from here to make the real loop run one. `run-hooks' is what
|
|
;; the loop calls, and calling it is the closest honest thing — it proves the
|
|
;; hook is installed, in the right buffer and nowhere else, and that running
|
|
;; it clears the overlay and uninstalls itself. It does not prove Emacs runs
|
|
;; it, which is Emacs' own contract.
|
|
(let ((buf (flan-dev--buffer-visiting file)))
|
|
(with-current-buffer buf
|
|
(flan-dev-clear-errors)
|
|
(let ((marked (flan-dev--show-error (format "%s:2:1" file) "no such name")))
|
|
(test-flan--check "a rejection is marked in the buffer it came from"
|
|
(and marked (flan-dev--error-overlays)))
|
|
(test-flan--check "and the buffer is armed to take it down again"
|
|
(memq #'flan-dev--clear-errors-on-command
|
|
pre-command-hook))
|
|
;; Buffer-local, or every buffer in the session runs this on every
|
|
;; keystroke for the sake of a buffer that had one bad evaluation.
|
|
(test-flan--check "and nobody else is"
|
|
(not (memq #'flan-dev--clear-errors-on-command
|
|
(default-value 'pre-command-hook))))
|
|
(run-hooks 'pre-command-hook)
|
|
(test-flan--check "the next command in that buffer clears it"
|
|
(null (flan-dev--error-overlays)))
|
|
(test-flan--check "and the hook goes with the last overlay"
|
|
(not (memq #'flan-dev--clear-errors-on-command
|
|
pre-command-hook))))))
|
|
|
|
;; ── Disassembly ───────────────────────────────────────────────────────
|
|
;;
|
|
;; Its own daemon, because the first one was disconnected above and a
|
|
;; disassembly is a question only a live session can answer: the daemon is
|
|
;; the thing that built the module and still has the .ll and the .so.
|
|
(let ((socket3 (concat socket "-disasm")))
|
|
(ignore-errors (delete-file socket3))
|
|
(flan-dev program socket3)
|
|
(test-flan--check "a daemon to disassemble against"
|
|
(process-live-p flan-dev--connection))
|
|
|
|
(when (executable-find "objdump")
|
|
(flan-disassemble "step")
|
|
(with-current-buffer flan-disassembly-buffer
|
|
(let ((text (buffer-string)))
|
|
(test-flan--check "C-c C-a writes a disassembly of the name"
|
|
(string-match-p "\\`; disassembly for step" text))
|
|
;; The header is the half a listing cannot carry: what the answer
|
|
;; claims, which for generated code is never "this is running".
|
|
(test-flan--check "with the daemon's own account of what it shows"
|
|
(string-match-p "showing" text))
|
|
(test-flan--check "and instructions under it, numbered from zero"
|
|
(string-match-p "^ 0000 " text)))))
|
|
|
|
;; The other half of the same question, on the same body.
|
|
(flan-disassemble "step" t)
|
|
(with-current-buffer flan-disassembly-buffer
|
|
(let ((text (buffer-string)))
|
|
(test-flan--check "C-u C-c C-a writes the IR it was built from"
|
|
(and (string-match-p "\\`; LLVM IR for step" text)
|
|
(string-match-p "^define .*flan\\.step" text)))
|
|
;; Nothing has been evaluated into this daemon, so the body in the
|
|
;; cell is still the one the process was launched with — the one case
|
|
;; where what is installed *now* is knowable, and it says so.
|
|
(test-flan--check "and says the program is still running the host's copy"
|
|
(string-match-p "host executable" text))))
|
|
|
|
;; Refused by name rather than shown as an empty buffer.
|
|
(test-flan--check "a name the program does not define is refused by name"
|
|
(let ((raised nil))
|
|
(condition-case err (flan-disassemble "no-such-thing")
|
|
(user-error (setq raised (error-message-string err))))
|
|
(and raised (string-match-p "no function named" raised))))
|
|
(test-flan--check "and so is a global, which has no code to show"
|
|
(let ((raised nil))
|
|
(condition-case err (flan-disassemble "ticks")
|
|
(user-error (setq raised (error-message-string err))))
|
|
(and raised (string-match-p "not a function" raised))))
|
|
|
|
(flan-dev-quit)
|
|
(ignore-errors (delete-file socket3)))
|
|
|
|
;; ── Marking a form with (pause) ───────────────────────────────────────
|
|
;;
|
|
;; DISCUSS.md §9: `C-u' before an evaluation marks a form so the program
|
|
;; stops when it runs, and the buffer is never edited — the position goes on
|
|
;; the wire beside the code and the daemon splices the call in after parsing.
|
|
;;
|
|
;; Last in this file on purpose: the one live check here *stops the program*,
|
|
;; and everything above it needs one that is running.
|
|
;;
|
|
;; Three things are the client's own and need no daemon at all: which form a
|
|
;; prefix argument picks, the byte column that names it, and the fact that a
|
|
;; mark outlives the next command where a rejection does not.
|
|
(with-temp-buffer
|
|
(flan-mode)
|
|
(insert "(defvar ticks i64)\n\n(defn step [] i64\n (set ticks (+ ticks 1))\n ticks)\n")
|
|
(goto-char (point-min))
|
|
(search-forward "(+ ticks 1)")
|
|
(goto-char (1- (match-end 0))) ; inside the (+ ...), before its ")"
|
|
(let* ((b (flan-dev--defun-bounds))
|
|
(inner (flan-dev--pause-bounds b '(4)))
|
|
(whole (flan-dev--pause-bounds b '(16))))
|
|
(test-flan--check "no prefix marks nothing"
|
|
(null (flan-dev--pause-bounds b nil)))
|
|
(test-flan--check "C-u marks the form point is inside"
|
|
(equal (buffer-substring-no-properties
|
|
(car inner) (cdr inner))
|
|
"(+ ticks 1)"))
|
|
;; A `defn' is a declaration and cannot be wrapped in a `do', so the
|
|
;; daemon reads the top-level form's own position as "stop on entry".
|
|
(test-flan--check "C-u C-u marks the top-level form itself"
|
|
(equal whole b)))
|
|
;; Point at the very start of the defn is not nested inside anything, and
|
|
;; `backward-up-list' would either fail or walk somewhere surprising. It
|
|
;; falls back to the defun, which is the only honest answer.
|
|
(goto-char (point-min))
|
|
(search-forward "(defn step")
|
|
(goto-char (match-beginning 0))
|
|
(let ((b (flan-dev--defun-bounds)))
|
|
(test-flan--check "and a prefix with point not nested falls back to it"
|
|
(equal (flan-dev--pause-bounds b '(4)) b)))
|
|
;; The column is a byte offset, because the reader walks the source a byte
|
|
;; at a time. Same rule as the `:loc' column, the other way round — and
|
|
;; `flan-dev--position' is the inverse, so a round trip is the check.
|
|
(goto-char (point-min))
|
|
(search-forward "(+ ticks 1)")
|
|
(let* ((pos (match-beginning 0))
|
|
(lc (flan-dev--wire-position pos)))
|
|
(test-flan--check "a marked position round-trips through the wire"
|
|
(= (flan-dev--position (nth 0 lc) (nth 1 lc)) pos)))
|
|
(with-temp-buffer
|
|
(insert ";; héllo\n(defn wörld [] i64 (+ 1 1))\n")
|
|
(goto-char (point-min))
|
|
(search-forward "(+ 1 1)")
|
|
(test-flan--check "and counts bytes, not characters, past a non-ASCII one"
|
|
(equal (flan-dev--wire-position (match-beginning 0))
|
|
(list 2 (1+ (string-bytes "(defn wörld [] i64 ")))))))
|
|
|
|
;; A mark is an annotation on the running program and not feedback about one
|
|
;; command, so unlike a rejection it has to survive the next keystroke. That
|
|
;; difference is the whole of its lifetime, and it is checked here the same
|
|
;; way the rejection's is: by calling what the command loop calls.
|
|
(with-temp-buffer
|
|
(flan-mode)
|
|
(insert "(defn step [] i64 (+ 1 1))\n")
|
|
(goto-char (point-min))
|
|
(search-forward "(+ 1 1)")
|
|
(flan-dev--show-pause (match-beginning 0) (match-end 0))
|
|
(test-flan--check "a mark is drawn over the form"
|
|
(= 1 (length (flan-dev--pause-overlays))))
|
|
(run-hooks 'pre-command-hook)
|
|
(test-flan--check "and survives the next command, where a rejection would not"
|
|
(= 1 (length (flan-dev--pause-overlays))))
|
|
;; Re-marking the same form leaves one, not two stacked overlays whose
|
|
;; faces compound into something that is not the face.
|
|
(flan-dev--show-pause (match-beginning 0) (match-end 0))
|
|
(test-flan--check "and marking it again leaves one mark, not two"
|
|
(= 1 (length (flan-dev--pause-overlays))))
|
|
(flan-dev-clear-pause)
|
|
(test-flan--check "and clearing takes it down"
|
|
(null (flan-dev--pause-overlays))))
|
|
|
|
;; And once against a real daemon: the round trip, the overlay drawn off the
|
|
;; reply's `:pause' rather than off what was asked for, and the mark coming
|
|
;; down again when the same form is evaluated plainly.
|
|
(let ((socket4 (concat socket "-pause")))
|
|
(ignore-errors (delete-file socket4))
|
|
(flan-dev program socket4)
|
|
(test-flan--check "a daemon to mark a form in"
|
|
(process-live-p flan-dev--connection))
|
|
(with-temp-buffer
|
|
(flan-mode)
|
|
(insert "(defn step [] i64\n (set ticks (+ ticks 1))\n ticks)\n")
|
|
(goto-char (point-min))
|
|
(search-forward "(+ ticks 1)")
|
|
(goto-char (1- (match-end 0)))
|
|
(flan-eval-defun '(4))
|
|
(let ((ovs (flan-dev--pause-overlays)))
|
|
(test-flan--check "C-u C-c C-c marks the form point is inside"
|
|
(and (= 1 (length ovs))
|
|
(equal (buffer-substring-no-properties
|
|
(overlay-start (car ovs))
|
|
(overlay-end (car ovs)))
|
|
"(+ ticks 1)")))
|
|
(test-flan--check "and marks it as a pause, not as an error"
|
|
(and ovs
|
|
(eq (overlay-get (car ovs) 'face)
|
|
'flan-dev-pause-face))))
|
|
;; The program calls `step' every few milliseconds, so it stops almost at
|
|
;; once — but "almost" is not "before this line", so wait for it.
|
|
(let ((tries 400))
|
|
(while (and (> tries 0) (not (eq (flan-dev-state) 'stopped)))
|
|
(setq tries (1- tries))
|
|
(flan-dev--request (list :op "describe"))
|
|
(sleep-for 0.005)))
|
|
(test-flan--check "and the program stops there"
|
|
(eq (flan-dev-state) 'stopped))
|
|
;; A plain `C-c C-c' over the same form replaces the stored declaration
|
|
;; with an unmarked one, which is what makes the mark stop sticking — and
|
|
;; the overlay has to go with it or the buffer is claiming a breakpoint
|
|
;; the daemon no longer has. Allowed while stopped: there is no frame in
|
|
;; progress for `step'.
|
|
(flan-eval-defun)
|
|
(test-flan--check "and an ordinary C-c C-c takes the mark down again"
|
|
(null (flan-dev--pause-overlays)))
|
|
;; Left running, because the next thing this file does is finish and the
|
|
;; daemon's program is killed with it — but a test that ends with the
|
|
;; program parked is one nobody can add anything after.
|
|
(flan-dev-restart "continue")
|
|
(let ((tries 400))
|
|
(while (and (> tries 0) (eq (flan-dev-state) 'stopped))
|
|
(setq tries (1- tries))
|
|
(flan-dev--request (list :op "describe"))
|
|
(sleep-for 0.005)))
|
|
(test-flan--check "and it resumes when continue is taken"
|
|
(not (eq (flan-dev-state) 'stopped))))
|
|
(flan-dev-quit)
|
|
(ignore-errors (delete-file socket4)))
|
|
|
|
(if (zerop test-flan--failures)
|
|
(message "flan-dev.el: all tests passed")
|
|
(message "\n%d failure(s)" test-flan--failures)
|
|
(kill-emacs 1)))
|
|
|
|
;;; test-flan-dev.el ends here
|