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-slack-config-commands.el | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tests/test-slack-config-commands.el') diff --git a/tests/test-slack-config-commands.el b/tests/test-slack-config-commands.el index 8944662ef..21cbb3e5a 100644 --- a/tests/test-slack-config-commands.el +++ b/tests/test-slack-config-commands.el @@ -194,7 +194,7 @@ ((symbol-function 'slack-buffer-update-mark-request) (lambda (_buf ts) (setq marked ts))) ((symbol-function 'bury-buffer) - (lambda () (setq buried t)))) + (lambda (&rest _) (setq buried t)))) (cj/slack-mark-read-and-bury)) (should (equal marked "1234.5678")) (should buried))) @@ -207,7 +207,7 @@ (cl-letf (((symbol-function 'slack-buffer-update-mark-request) (lambda (&rest _) (setq marked t))) ((symbol-function 'bury-buffer) - (lambda () (setq buried t)))) + (lambda (&rest _) (setq buried t)))) (cj/slack-mark-read-and-bury)) (should-not marked) (should buried))) -- cgit v1.2.3