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https://github.com/psycopg/psycopg2.git
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101 lines
2.8 KiB
Python
Executable File
101 lines
2.8 KiB
Python
Executable File
#!/usr/bin/env python
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import unittest
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import psycopg2
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from psycopg2 import extensions
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import time
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import select
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import signal
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from subprocess import Popen
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import sys
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if sys.version_info < (3,):
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import tests
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else:
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import py3tests as tests
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class NotifiesTests(unittest.TestCase):
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def setUp(self):
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self.conn = psycopg2.connect(tests.dsn)
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def tearDown(self):
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self.conn.close()
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def autocommit(self, conn):
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"""Set a connection in autocommit mode."""
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conn.set_isolation_level(extensions.ISOLATION_LEVEL_AUTOCOMMIT)
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def listen(self, name):
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"""Start listening for a name on self.conn."""
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curs = self.conn.cursor()
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curs.execute("LISTEN " + name)
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curs.close()
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def notify(self, name, sec=0):
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"""Send a notification to the database, eventually after some time."""
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script = ("""\
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import time
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time.sleep(%(sec)s)
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import psycopg2
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import psycopg2.extensions
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conn = psycopg2.connect(%(dsn)r)
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conn.set_isolation_level(psycopg2.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
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curs = conn.cursor()
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curs.execute("NOTIFY " %(name)r)
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curs.close()
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conn.close()
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"""
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% { 'dsn': tests.dsn, 'sec': sec, 'name': name})
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return Popen([sys.executable, '-c', script])
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def test_notifies_received_on_poll(self):
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self.autocommit(self.conn)
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self.listen('foo')
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self.notify('foo', 1);
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t0 = time.time()
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ready = select.select([self.conn], [], [], 5)
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t1 = time.time()
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self.assert_(0.99 < t1 - t0 < 4, t1 - t0)
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self.assertEqual(0, len(self.conn.notifies))
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self.assertEqual(extensions.POLL_OK, self.conn.poll())
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self.assertEqual(1, len(self.conn.notifies))
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self.assertEqual('foo', self.conn.notifies[0][1])
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def test_many_notifies(self):
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self.autocommit(self.conn)
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for name in ['foo', 'bar', 'baz']:
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self.listen(name)
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for name in ['foo', 'bar', 'baz', 'qux']:
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self.notify(name).wait()
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self.assertEqual(0, len(self.conn.notifies))
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self.assertEqual(extensions.POLL_OK, self.conn.poll())
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self.assertEqual(3, len(self.conn.notifies))
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names = [n[1] for n in self.conn.notifies]
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for name in ['foo', 'bar', 'baz']:
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self.assert_(name in names, name)
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def test_notifies_received_on_execute(self):
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self.autocommit(self.conn)
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self.listen('foo')
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self.notify('foo').wait()
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self.assertEqual(0, len(self.conn.notifies))
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self.conn.cursor().execute('select 1;')
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self.assertEqual(1, len(self.conn.notifies))
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self.assertEqual('foo', self.conn.notifies[0][1])
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def test_suite():
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return unittest.TestLoader().loadTestsFromName(__name__)
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if __name__ == "__main__":
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unittest.main()
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