bug#20117: 25.0.50; Tramp tests failing on Cygwin

[Michael Albinus <michael.albinus@gmx.de>]

Ken Brown <kbrown@cornell.edu> writes:

> Several Tramp tests have recently started failing on Cygwin, the first
> being tramp-test19-directory-files-and-attributes.  The test aborts
> after the failure:
>
> Test tramp-test19-directory-files-and-attributes aborted with non-local exit
>   ABORTED  20/35  tramp-test19-directory-files-and-attributes

All tests in tramp-tests.el can be instrumented like this:

--8<---------------cut here---------------start------------->8---
*** /home/albinus/src/emacs/test/automated/tramp-tests.el.~master~	2015-03-16 19:42:03.629467429 +0100
--- /home/albinus/src/emacs/test/automated/tramp-tests.el	2015-03-16 17:41:30.112292199 +0100
***************
*** 1024,1029 ****
--- 1024,1030 ----
    "Check `directory-files-and-attributes'."
    (skip-unless (tramp--test-enabled))
  
+   (tramp--instrument-test-case 10
    ;; `directory-files-and-attributes' contains also values for "../".
    ;; Ensure that this doesn't change during tests, for
    ;; example due to handling temporary files.
***************
*** 1059,1065 ****
  	       (equal (file-attributes (car elt)) (cdr elt)))))
  	  (setq attr (directory-files-and-attributes tmp-name2 nil "^b"))
  	  (should (equal (mapcar 'car attr) '("bar" "boz"))))
!       (ignore-errors (delete-directory tmp-name1 'recursive)))))
  
  (ert-deftest tramp-test20-file-modes ()
    "Check `file-modes'.
--- 1060,1066 ----
  	       (equal (file-attributes (car elt)) (cdr elt)))))
  	  (setq attr (directory-files-and-attributes tmp-name2 nil "^b"))
  	  (should (equal (mapcar 'car attr) '("bar" "boz"))))
!       (ignore-errors (delete-directory tmp-name1 'recursive))))))
  
  (ert-deftest tramp-test20-file-modes ()
    "Check `file-modes'.
--8<---------------cut here---------------end--------------->8---

There will be a lot of traces in the test's *Messages* buffer. If you
run the Tramp tests interactively, go with the cursor to the failed test
and type "m". In batchmode, it shall be dumped.

> Ken

Best regards, Michael.