Improve timing in `tramp-test29-environment-variables'

* test/automated/tramp-tests.el
(tramp-test--shell-command-to-string-asynchronously):
Add additional `accept-process-output' call.
(tramp-test29-environment-variables): Remove additional sleep calls.

1 files changed, 9 insertions, 13 deletions

diff --git a/test/automated/tramp-tests.el b/test/automated/tramp-tests.el
index cc90d1950cd..34d8d6ad495 100644
--- a/test/automated/tramp-tests.el
+++ b/test/automated/tramp-tests.el
@@ -1604,10 +1604,9 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
     (async-shell-command command (current-buffer))
     ;; Suppress nasty messages.
     (set-process-sentinel (get-buffer-process (current-buffer)) nil)
-    (while
-        (and (get-buffer-process (current-buffer))
-             (eq (process-status (get-buffer-process (current-buffer))) 'run))
-      (accept-process-output (get-buffer-process (current-buffer)) 1))
+    (while (get-buffer-process (current-buffer))
+      (accept-process-output (get-buffer-process (current-buffer)) 0.1))
+    (accept-process-output)
     (buffer-substring-no-properties (point-min) (point-max))))
 
 ;; This test is inspired by Bug#23952.
@@ -1620,9 +1619,6 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
     (tramp-find-foreign-file-name-handler tramp-test-temporary-file-directory)
     'tramp-sh-file-name-handler))
 
-  ;; Implementation note: There is a "sleep 1" at the end of every
-  ;; test.  Otherwise, the scripts could return too early, without
-  ;; expected output.
   (dolist (this-shell-command-to-string
            '(;; Synchronously.
              shell-command-to-string
@@ -1644,7 +1640,7 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
               "foo"
               (funcall
                this-shell-command-to-string
-               (format "echo -n ${%s:?bla}; sleep 1" envvar))))))
+               (format "echo -n ${%s:?bla}" envvar))))))
 
       (unwind-protect
           ;; Set the empty value.
@@ -1656,12 +1652,12 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
               "bla"
               (funcall
                this-shell-command-to-string
-               (format "echo -n ${%s:?bla}; sleep 1" envvar))))
+               (format "echo -n ${%s:?bla}" envvar))))
             ;; Variable is set.
             (should
              (string-match
               (regexp-quote envvar)
-              (funcall this-shell-command-to-string "set; sleep 1")))))
+              (funcall this-shell-command-to-string "set")))))
 
       ;; We force a reconnect, in order to have a clean environment.
       (tramp-cleanup-connection
@@ -1678,7 +1674,7 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
               "foo"
               (funcall
                this-shell-command-to-string
-               (format "echo -n ${%s:?bla}; sleep 1" envvar))))
+               (format "echo -n ${%s:?bla}" envvar))))
             (let ((process-environment
                    (cons envvar process-environment)))
               ;; Variable is unset.
@@ -1687,12 +1683,12 @@ This tests also `make-symbolic-link', `file-truename' and `add-name-to-file'."
                 "bla"
                 (funcall
                  this-shell-command-to-string
-                 (format "echo -n ${%s:?bla}; sleep 1" envvar))))
+                 (format "echo -n ${%s:?bla}" envvar))))
               ;; Variable is unset.
               (should-not
                (string-match
                 (regexp-quote envvar)
-                (funcall this-shell-command-to-string "set; sleep 1")))))))))
+                (funcall this-shell-command-to-string "set")))))))))
 
 (ert-deftest tramp-test30-vc-registered ()
   "Check `vc-registered'."