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-ui-config-transparency-and-cursor.el | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'tests/test-ui-config-transparency-and-cursor.el') diff --git a/tests/test-ui-config-transparency-and-cursor.el b/tests/test-ui-config-transparency-and-cursor.el index b01fa2b71..13906773b 100644 --- a/tests/test-ui-config-transparency-and-cursor.el +++ b/tests/test-ui-config-transparency-and-cursor.el @@ -23,7 +23,7 @@ (cj/transparency-level 70) (default-frame-alist nil) (applied nil)) - (cl-letf (((symbol-function 'display-graphic-p) (lambda () t)) + (cl-letf (((symbol-function 'display-graphic-p) (lambda (&rest _) t)) ((symbol-function 'set-frame-parameter) (lambda (_frame param value) (when (eq param 'alpha) (setq applied value))))) @@ -37,7 +37,7 @@ (cj/transparency-level 50) (default-frame-alist '((alpha . (50 . 50)))) (applied nil)) - (cl-letf (((symbol-function 'display-graphic-p) (lambda () t)) + (cl-letf (((symbol-function 'display-graphic-p) (lambda (&rest _) t)) ((symbol-function 'set-frame-parameter) (lambda (_frame param value) (when (eq param 'alpha) (setq applied value))))) @@ -52,7 +52,7 @@ the default-frame-alist so a future graphical frame would pick it up." (cj/transparency-level 60) (default-frame-alist nil) (set-called nil)) - (cl-letf (((symbol-function 'display-graphic-p) (lambda () nil)) + (cl-letf (((symbol-function 'display-graphic-p) (lambda (&rest _) nil)) ((symbol-function 'set-frame-parameter) (lambda (&rest _) (setq set-called t)))) (cj/apply-transparency)) @@ -66,7 +66,7 @@ surfaced via `message'; the default-alist update still happens." (cj/transparency-level 60) (default-frame-alist nil) (msg nil)) - (cl-letf (((symbol-function 'display-graphic-p) (lambda () t)) + (cl-letf (((symbol-function 'display-graphic-p) (lambda (&rest _) t)) ((symbol-function 'set-frame-parameter) (lambda (&rest _) (error "boom"))) ((symbol-function 'message) @@ -83,7 +83,7 @@ surfaced via `message'; the default-alist update still happens." (cj/transparency-level 80) (default-frame-alist nil) (applied nil)) - (cl-letf (((symbol-function 'display-graphic-p) (lambda () t)) + (cl-letf (((symbol-function 'display-graphic-p) (lambda (&rest _) t)) ((symbol-function 'set-frame-parameter) (lambda (_frame param value) (when (eq param 'alpha) (setq applied value)))) @@ -97,7 +97,7 @@ surfaced via `message'; the default-alist update still happens." (let ((cj/enable-transparency t) (cj/transparency-level 90) (default-frame-alist nil)) - (cl-letf (((symbol-function 'display-graphic-p) (lambda () t)) + (cl-letf (((symbol-function 'display-graphic-p) (lambda (&rest _) t)) ((symbol-function 'set-frame-parameter) #'ignore) ((symbol-function 'message) #'ignore)) (cj/toggle-transparency) -- cgit v1.2.3