From a249e415c7199e3d4698f1956687fa351296a357 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-flyspell-and-abbrev.el | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'tests/test-flyspell-and-abbrev.el') diff --git a/tests/test-flyspell-and-abbrev.el b/tests/test-flyspell-and-abbrev.el index 793fdc0f..ef8cc637 100644 --- a/tests/test-flyspell-and-abbrev.el +++ b/tests/test-flyspell-and-abbrev.el @@ -32,12 +32,12 @@ (ert-deftest test-flyspell-require-spell-checker-present () "Normal: a checker on PATH means no error." (cl-letf (((symbol-function 'executable-find) - (lambda (cmd) (equal cmd (car cj/--spell-checker-executables))))) + (lambda (cmd &rest _) (equal cmd (car cj/--spell-checker-executables))))) (should-not (cj/--require-spell-checker)))) (ert-deftest test-flyspell-require-spell-checker-missing () "Error: no checker on PATH signals user-error." - (cl-letf (((symbol-function 'executable-find) (lambda (_) nil))) + (cl-letf (((symbol-function 'executable-find) (lambda (_ &rest _) nil))) (should-error (cj/--require-spell-checker) :type 'user-error))) ;; --------------------- cj/find-previous-flyspell-overlay --------------------- -- cgit v1.2.3