bug#30327: 27.0.50; Failures in files-tests.el on macOS

[Michael Albinus]

Alan Third <alan@idiocy.org> writes:

Hi Alan,

> Today I ran make check and two new failures popped up. It looks like
> they're from recent additions to files-tests.el.
>
> Log file attached.
>
> Test files-tests-file-name-non-special-file-truename condition:
>     (ert-test-failed
>      ((should
>        (equal nospecial
>             (file-truename nospecial)))
>       :form
>       (equal 
> "/:/var/folders/rs/0j9q5wvj5qv1h4p08j_dnbvw0000gn/T/files-testskeK4ZJ" 
> "/:/private/var/folders/rs/0j9q5wvj5qv1h4p08j_dnbvw0000gn/T/files-testskeK4ZJ")

My crystal ball tells me, that your temporary-file-directory is located
on a symlinked directory.

Does the following patch cures it?

diff --git a/test/lisp/files-tests.el b/test/lisp/files-tests.el
index 90e5ebf215..61e22a47af 100644
--- a/test/lisp/files-tests.el
+++ b/test/lisp/files-tests.el
@@ -353,7 +353,8 @@ files-tests--with-temp-file
   (declare (indent 1) (debug ((symbolp symbolp &optional form) body)))
   (cl-check-type name symbol)
   (cl-check-type non-special-name symbol)
-  `(let* ((,name (make-temp-file "files-tests" ,dir-flag))
+  `(let* ((temporary-file-directory (file-truename temporary-file-directory))
+          (,name (make-temp-file "files-tests" ,dir-flag))
           (,non-special-name (file-name-quote ,name)))
      (unwind-protect
          (progn ,@body)

Best regards, Michael.