fix(test): make test-name resilient to load-time cwd changes

make test-name loads every test file into one Emacs, then selects by name. test-system-defaults-functions.el requires system-defaults at load, which runs (setq default-directory user-home-dir), an intentional config choice. That leaked the cwd into the shared session, so every relative -l tests/X.el load after it resolved against the wrong directory and aborted the whole run with Error 255.

I made two changes. test-name now passes absolute paths to -l so loads survive any cwd change, and the test contains the leak by let-binding default-directory around the require. The production setq stays as is.

1 files changed, 6 insertions, 1 deletions

diff --git a/tests/test-system-defaults-functions.el b/tests/test-system-defaults-functions.el
index 580e7a7cf..154e36783 100644
--- a/tests/test-system-defaults-functions.el
+++ b/tests/test-system-defaults-functions.el
@@ -47,7 +47,12 @@
 ;; bodies.  Stubs deliberately scope only to the require so the
 ;; real primitives remain available for unrelated tests in the
 ;; same Emacs.
-(let ((use-package-always-ensure nil))
+;; Contain system-defaults' load-time `(setq default-directory user-home-dir)'
+;; so it doesn't leak into a shared batch session.  `make test-name' loads
+;; every test file into one Emacs; a leaked cwd there breaks the relative
+;; loads of every file that follows.
+(let ((default-directory default-directory)
+      (use-package-always-ensure nil))
   (cl-letf (((symbol-function 'server-running-p) (lambda (&rest _) t))
             ((symbol-function 'server-start) #'ignore)
             ((symbol-function 'set-locale-environment) #'ignore)