[tor-commits] [tor/master] Make test_rebind.py timeout when waiting for a log message

[nickm@xxxxxxxxxxxxxx]

commit a02d6c560d8b574003b4c34907c1656f8c57e857
Author: teor <teor@xxxxxxxxxxxxxx>
Date:   Sat Oct 6 16:10:37 2018 -0500

    Make test_rebind.py timeout when waiting for a log message
    
    Closes #27968.
---
 src/test/test_rebind.py | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/test/test_rebind.py b/src/test/test_rebind.py
index 3600dd5d5..5e671de30 100644
--- a/src/test/test_rebind.py
+++ b/src/test/test_rebind.py
@@ -8,6 +8,10 @@ import time
 import random
 import errno
 
+LOG_TIMEOUT = 60.0
+LOG_WAIT = 0.1
+LOG_CHECK_LIMIT = LOG_TIMEOUT / LOG_WAIT
+
 def fail(msg):
     print('FAIL')
     sys.exit(msg)
@@ -20,10 +24,19 @@ def try_connecting_to_socksport():
     socks_socket.close()
 
 def wait_for_log(s):
-    while True:
+    log_checked = 0
+    while log_checked < LOG_CHECK_LIMIT:
         l = tor_process.stdout.readline()
-        if s in l.decode('utf8'):
+        l = l.decode('utf8')
+        if s in l:
             return
+        print('Tor logged: "{}", waiting for "{}"'.format(l.strip(), s))
+        # readline() returns a blank string when there is no output
+        # avoid busy-waiting
+        if len(s) == 0:
+            time.sleep(LOG_WAIT)
+        log_checked += 1
+    fail('Could not find "{}" in logs after {} seconds'.format(s, LOG_TIMEOUT))
 
 def pick_random_port():
     port = 0



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