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--f6-test-runner-cmd-for.el | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tests/test-dev-fkeys--f6-test-runner-cmd-for.el') diff --git a/tests/test-dev-fkeys--f6-test-runner-cmd-for.el b/tests/test-dev-fkeys--f6-test-runner-cmd-for.el index 9a5526125..d7b6a0597 100644 --- a/tests/test-dev-fkeys--f6-test-runner-cmd-for.el +++ b/tests/test-dev-fkeys--f6-test-runner-cmd-for.el @@ -126,13 +126,13 @@ neither tool is present, the user gets a clear runner-not-found error rather than a silent nil that F6's outer wrapper interprets as \"language unsupported.\"" (cl-letf (((symbol-function 'executable-find) - (lambda (_) nil))) + (lambda (_ &rest _) nil))) (should (equal (cj/--f6-test-runner-cmd-for 'typescript t "src/foo.test.ts" "foo" "src") "npx --no-install jest src/foo.test.ts"))) (cl-letf (((symbol-function 'executable-find) - (lambda (p) (when (equal p "vitest") "/usr/bin/vitest")))) + (lambda (p &rest _) (when (equal p "vitest") "/usr/bin/vitest")))) (should (equal (cj/--f6-test-runner-cmd-for 'typescript t "src/foo.test.ts" "foo" "src") -- cgit v1.2.3