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-org-drill-config.el | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tests/test-org-drill-config.el') diff --git a/tests/test-org-drill-config.el b/tests/test-org-drill-config.el index d3057de2a..9dffa0bca 100644 --- a/tests/test-org-drill-config.el +++ b/tests/test-org-drill-config.el @@ -118,7 +118,7 @@ (let (opened (drilled 0)) (cl-letf (((symbol-function 'cj/--drill-pick-file) (lambda (_dir) "/decks/french.org")) - ((symbol-function 'find-file) (lambda (f) (setq opened f))) + ((symbol-function 'find-file) (lambda (f &rest _) (setq opened f))) ((symbol-function 'org-drill) (lambda (&rest _) (cl-incf drilled)))) (cj/drill-start)) (should (equal "/decks/french.org" opened)) @@ -131,7 +131,7 @@ (let (opened) (cl-letf (((symbol-function 'read-directory-name) (lambda (&rest _) dir)) ((symbol-function 'completing-read) (lambda (&rest _) "latin.org")) - ((symbol-function 'find-file) (lambda (f) (setq opened f))) + ((symbol-function 'find-file) (lambda (f &rest _) (setq opened f))) ((symbol-function 'org-drill) #'ignore)) (cj/drill-start t)) (should (equal (expand-file-name "latin.org" dir) opened))))) -- cgit v1.2.3