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-dev-fkeys--projectile-advice-install.el | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tests/test-dev-fkeys--projectile-advice-install.el') diff --git a/tests/test-dev-fkeys--projectile-advice-install.el b/tests/test-dev-fkeys--projectile-advice-install.el index bfa9b691f..d0a9a9cc0 100644 --- a/tests/test-dev-fkeys--projectile-advice-install.el +++ b/tests/test-dev-fkeys--projectile-advice-install.el @@ -16,7 +16,7 @@ "When Projectile is not loaded, registration should use `eval-after-load'." (let (registered-feature registered-form install-called) (cl-letf (((symbol-function 'featurep) - (lambda (feature) (and (not (eq feature 'projectile)) + (lambda (feature &rest _) (and (not (eq feature 'projectile)) (featurep feature)))) ((symbol-function 'eval-after-load) (lambda (feature form) @@ -33,7 +33,7 @@ "When Projectile is already loaded, registration should install immediately." (let (install-called eval-after-load-called) (cl-letf (((symbol-function 'featurep) - (lambda (feature) (eq feature 'projectile))) + (lambda (feature &rest _) (eq feature 'projectile))) ((symbol-function 'eval-after-load) (lambda (&rest _args) (setq eval-after-load-called t))) ((symbol-function 'cj/--projectile-install-revert-advice) -- cgit v1.2.3