[tests] timeout integration tests on travis after 20 minutes

Author: jnewbery

test/functional/test_runner.py

@@ -20,6 +20,7 @@
 import os
 import time
 import shutil
+import signal
 import sys
 import subprocess
 import tempfile
@@ -389,6 +390,10 @@ def get_next(self):
             time.sleep(.5)
             for j in self.jobs:
                 (name, time0, proc, log_out, log_err) = j
+                if os.getenv('TRAVIS') == 'true' and int(time.time() - time0) > 20 * 60:
+                    # In travis, timeout individual tests after 20 minutes (to stop tests hanging and not
+                    # providing useful output.
+                    proc.send_signal(signal.SIGINT)
                 if proc.poll() is not None:
                     log_out.seek(0), log_err.seek(0)
                     [stdout, stderr] = [l.read().decode('utf-8') for l in (log_out, log_err)]