From 0aa85dd219f4be8dbf3383661fd2b42370945b87 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 21 Jun 2026 03:19:08 -0400 Subject: test: make subr mocks variadic for native-comp, add arity meta-test Re-enabling native-comp surfaced a suite-wide fragility. When a test redefines a C primitive (or a native-compiled function), native-comp routes native callers through a trampoline that calls the mock with the primitive's maximum arity. A fixed-arity mock narrower than the primitive then throws wrong-number-of-arguments, intermittently, as the eln-cache fills. I swept every arity-narrow subr mock to append &rest _ (188 sites, preserving any named args the body uses), and added tests/test-meta-subr-mock-arity.el, which fails make test on any subr mock too narrow for the primitive's arity. The rule isn't "never mock a subr". The suite mocks message and completing-read freely. It's "a subr mock must accept the primitive's arity." Background, the three failure modes, and the research are in docs/native-comp-subr-mocking.org. --- tests/test-media-utils.el | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'tests/test-media-utils.el') diff --git a/tests/test-media-utils.el b/tests/test-media-utils.el index 9384d568f..841b6faf9 100644 --- a/tests/test-media-utils.el +++ b/tests/test-media-utils.el @@ -24,7 +24,7 @@ (ert-deftest test-media-get-available-players-filters-by-executable () "Normal: only players whose :command is on PATH are reported." (cl-letf (((symbol-function 'executable-find) - (lambda (cmd) (and (member cmd '("mpv" "vlc")) cmd)))) + (lambda (cmd &rest _) (and (member cmd '("mpv" "vlc")) cmd)))) (let ((result (cj/get-available-media-players))) (should (memq 'mpv result)) (should (memq 'vlc result)) @@ -32,7 +32,7 @@ (ert-deftest test-media-get-available-players-none-installed () "Boundary: with nothing on PATH, the list is empty." - (cl-letf (((symbol-function 'executable-find) (lambda (_) nil))) + (cl-letf (((symbol-function 'executable-find) (lambda (_ &rest _) nil))) (should-not (cj/get-available-media-players)))) ;; ----------------------------- cj/media-play-it ------------------------------ @@ -41,7 +41,7 @@ "Normal: a player that needs no stream URL gets a plain command, no yt-dlp." (let (captured cj/default-media-player) (setq cj/default-media-player 'mpv) - (cl-letf (((symbol-function 'executable-find) (lambda (_) "/usr/bin/mpv")) + (cl-letf (((symbol-function 'executable-find) (lambda (_ &rest _) "/usr/bin/mpv")) ((symbol-function 'start-process-shell-command) (lambda (_n _b cmd) (setq captured cmd) 'proc)) ((symbol-function 'set-process-sentinel) #'ignore) @@ -56,7 +56,7 @@ "Normal: a player needing a stream URL wraps the URL in a yt-dlp -g call." (let (captured cj/default-media-player) (setq cj/default-media-player 'vlc) - (cl-letf (((symbol-function 'executable-find) (lambda (_) "/usr/bin/vlc")) + (cl-letf (((symbol-function 'executable-find) (lambda (_ &rest _) "/usr/bin/vlc")) ((symbol-function 'start-process-shell-command) (lambda (_n _b cmd) (setq captured cmd) 'proc)) ((symbol-function 'set-process-sentinel) #'ignore) @@ -71,7 +71,7 @@ "Error: an unavailable player command signals an error before launching." (let (cj/default-media-player) (setq cj/default-media-player 'mpv) - (cl-letf (((symbol-function 'executable-find) (lambda (_) nil))) + (cl-letf (((symbol-function 'executable-find) (lambda (_ &rest _) nil))) (should-error (cj/media-play-it "https://example.com/v"))))) ;; ------------------------------- cj/yt-dl-it --------------------------------- @@ -79,19 +79,19 @@ (ert-deftest test-media-yt-dl-it-errors-without-yt-dlp () "Error: a missing yt-dlp aborts the download." (cl-letf (((symbol-function 'executable-find) - (lambda (cmd) (unless (equal cmd "yt-dlp") "/usr/bin/x")))) + (lambda (cmd &rest _) (unless (equal cmd "yt-dlp") "/usr/bin/x")))) (should-error (cj/yt-dl-it "https://example.com/v")))) (ert-deftest test-media-yt-dl-it-errors-without-tsp () "Error: yt-dlp present but tsp missing aborts the download." (cl-letf (((symbol-function 'executable-find) - (lambda (cmd) (unless (equal cmd "tsp") "/usr/bin/x")))) + (lambda (cmd &rest _) (unless (equal cmd "tsp") "/usr/bin/x")))) (should-error (cj/yt-dl-it "https://example.com/v")))) (ert-deftest test-media-yt-dl-it-builds-tsp-yt-dlp-process () "Normal: with both tools present, the URL is queued via tsp + yt-dlp." (let (captured (videos-dir "/tmp/videos")) - (cl-letf (((symbol-function 'executable-find) (lambda (_) "/usr/bin/x")) + (cl-letf (((symbol-function 'executable-find) (lambda (_ &rest _) "/usr/bin/x")) ((symbol-function 'start-process) (lambda (&rest args) (setq captured args) 'proc)) ((symbol-function 'set-process-sentinel) #'ignore) -- cgit v1.2.3