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-host-environment--display-predicates.el | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tests/test-host-environment--display-predicates.el') diff --git a/tests/test-host-environment--display-predicates.el b/tests/test-host-environment--display-predicates.el index 15dff2ef8..5a87b5009 100644 --- a/tests/test-host-environment--display-predicates.el +++ b/tests/test-host-environment--display-predicates.el @@ -26,7 +26,7 @@ GRAPHIC-P becomes the return of `(display-graphic-p)'." `(cl-letf (((symbol-function 'window-system) (lambda (&optional _) ,window-system-value)) ((symbol-function 'getenv) - (lambda (name) + (lambda (name &rest _) (when (string= name "WAYLAND_DISPLAY") ,wayland-display))) ((symbol-function 'display-graphic-p) (lambda (&optional _) ,graphic-p))) -- cgit v1.2.3