1 files changed, 19 insertions, 10 deletions
diff --git a/test/lisp/eshell/eshell-tests-helpers.el b/test/lisp/eshell/eshell-tests-helpers.el
index 1d9674070c0..a9338050311 100644
--- a/test/lisp/eshell/eshell-tests-helpers.el
+++ b/test/lisp/eshell/eshell-tests-helpers.el
@@ -33,9 +33,9 @@
 (defvar eshell-history-file-name nil)
 (defvar eshell-last-dir-ring-file-name nil)
 
-(defvar eshell-test--max-subprocess-time 5
-  "The maximum amount of time to wait for a subprocess to finish, in seconds.
-See `eshell-wait-for-subprocess'.")
+(defvar eshell-test--max-wait-time 5
+  "The maximum amount of time to wait for a condition to resolve, in seconds.
+See `eshell-wait-for'.")
 
 (defun eshell-tests-remote-accessible-p ()
   "Return if a test involving remote files can proceed.
@@ -73,19 +73,28 @@ BUFNAME will be set to the name of the temporary buffer."
      (let ((,bufname (buffer-name)))
        ,@body)))
 
+(defun eshell-wait-for (predicate &optional message)
+  "Wait until PREDICATE returns non-nil.
+If this takes longer than `eshell-test--max-wait-time', raise an
+error.  MESSAGE is an optional message to use if this times out."
+  (let ((start (current-time))
+        (message (or message "timed out waiting for condition")))
+    (while (not (funcall predicate))
+      (when (> (float-time (time-since start))
+               eshell-test--max-wait-time)
+        (error message))
+      (sit-for 0.1))))
+
 (defun eshell-wait-for-subprocess (&optional all)
   "Wait until there is no interactive subprocess running in Eshell.
 If ALL is non-nil, wait until there are no Eshell subprocesses at
 all running.
 
-If this takes longer than `eshell-test--max-subprocess-time',
+If this takes longer than `eshell-test--max-wait-time',
 raise an error."
-  (let ((start (current-time)))
-    (while (if all eshell-process-list (eshell-interactive-process-p))
-      (when (> (float-time (time-since start))
-               eshell-test--max-subprocess-time)
-        (error "timed out waiting for subprocess(es)"))
-      (sit-for 0.1))))
+  (eshell-wait-for
+   (lambda ()
+     (not (if all eshell-process-list (eshell-interactive-process-p))))))
 
 (defun eshell-insert-command (command &optional func)
   "Insert a COMMAND at the end of the buffer.