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#!/usr/bin/env python
##
## Copyright (C) 2008, 2009 Nokia. All rights reserved.
##
## Contact: Marius Vollmer <marius.vollmer@nokia.com>
##
## This library is free software; you can redistribute it and/or
## modify it under the terms of the GNU Lesser General Public License
## version 2.1 as published by the Free Software Foundation.
##
## This library is distributed in the hope that it will be useful, but
## WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
## Lesser General Public License for more details.
##
## You should have received a copy of the GNU Lesser General Public
## License along with this library; if not, write to the Free Software
## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
## 02110-1301 USA
##
##
## This test:
## - starts up a provider with one property
## - starts a client, verifies that the value arrives
## - suspends the client (so it stops processing D-Bus messages)
## - sets new value for the property twice in the provider
## - resumes the client
## - verifies that the client receives only one valueChanged signal
import re
import sys
import os
import unittest
from ContextKit.cltool import CLTool, wanted
class RapidChanges(unittest.TestCase):
def testRapidChanges(self):
"""
Description
This test verifies that the subscriber library doesn't emit
unnecessary valueChanged signals (in spite of receiving multiple
D-Bus messages in the same main loop iteration).
Steps
1. starts up a provider with one property
2. starts a client, verifies that the value arrives
3. suspends the client (so it stops processing D-Bus messages)
4. sets new value for the property twice in the provider
5. resumes the client
6. verifies that the client receives only one valueChanged signal
"""
provider_fast = CLTool("context-provide", "--v2", "com.nokia.fast",
"int","test.fast","44")
provider_fast.expect("Setting key")
context_client = CLTool("context-listen", "test.fast")
self.assert_(context_client.expect(wanted("test.fast", "int", "44")),
"Bad value for the fast property, wanted 44")
context_client.suspend()
provider_fast.send("test.fast = 34")
provider_fast.expect("Setting key")
provider_fast.send("test.fast = 54")
provider_fast.expect("Setting key")
context_client.resume()
context_client.expect(wanted("test.fast", "int", "54"))
# the two value changes can happen very close in time, so we
# have to check that beyond the good value there are no other
# value(s)
if len(re.findall("test.fast =", context_client.last_output)) != 1:
context_client.printio()
self.assert_(False,
"expected a single valueChanged")
# not even after waiting one second
self.assertFalse(context_client.expect("test.fast =", wantdump = False, timeout=1),
"expected a single valueChanged")
context_client.wait()
provider_fast.wait()
def runTests():
suiteInstallation = unittest.TestLoader().loadTestsFromTestCase(RapidChanges)
result = unittest.TextTestRunner(verbosity=2).run(suiteInstallation)
return len(result.errors + result.failures)
if __name__ == "__main__":
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 1)
sys.exit(runTests())
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