; Fix 'threads-join-error' test

* test/src/thread-tests.el (threads-thread-sleeps): New helper
function.
(threads-join-error): Fix to work as intended, and remove the
'unstable' tag.  (Bug#40823)

1 files changed, 10 insertions, 5 deletions

diff --git a/test/src/thread-tests.el b/test/src/thread-tests.el
index 322547c2e6a..9a065187b5e 100644
--- a/test/src/thread-tests.el
+++ b/test/src/thread-tests.el
@@ -111,14 +111,19 @@
   (skip-unless (featurep 'threads))
   (should-error (thread-join (current-thread))))
 
+(defun threads-thread-sleeps ()
+  "Put current thread to sleep."
+  (sleep-for 5))
+
 (ert-deftest threads-join-error ()
   "Test of error signaling from `thread-join'."
-  :tags '(:unstable)
   (skip-unless (featurep 'threads))
-  (let ((thread (make-thread #'threads-call-error)))
-    (while (thread-live-p thread)
-      (thread-yield))
-    (should-error (thread-join thread))))
+  (let ((thread (make-thread #'threads-thread-sleeps))
+        err)
+    (thread-signal thread 'error "Error signal for thread")
+    (thread-yield)
+    (setq err (should-error (thread-join thread)))
+    (should (equal err '(error . "Error signal for thread")))))
 
 (defvar threads-test-binding nil)