def testConnectionCounting(self):
# Make a basic factory
factory = policies.LimitTotalConnectionsFactory()
factory.protocol = protocol.Protocol
# connectionCount starts at zero
self.assertEqual(0, factory.connectionCount)
# connectionCount increments as connections are made
p1 = factory.buildProtocol(None)
self.assertEqual(1, factory.connectionCount)
p2 = factory.buildProtocol(None)
self.assertEqual(2, factory.connectionCount)
# and decrements as they are lost
p1.connectionLost(None)
self.assertEqual(1, factory.connectionCount)
p2.connectionLost(None)
self.assertEqual(0, factory.connectionCount)
def testConnectionLimiting(self):
# Make a basic factory with a connection limit of 1
factory = policies.LimitTotalConnectionsFactory()
factory.protocol = protocol.Protocol
factory.connectionLimit = 1
# Make a connection
p = factory.buildProtocol(None)
self.assertIsNotNone(p)
self.assertEqual(1, factory.connectionCount)
# Try to make a second connection, which will exceed the connection
# limit. This should return None, because overflowProtocol is None.
self.assertIsNone(factory.buildProtocol(None))
self.assertEqual(1, factory.connectionCount)
# Define an overflow protocol
class OverflowProtocol(protocol.Protocol):
def connectionMade(self):
factory.overflowed = True
factory.overflowProtocol = OverflowProtocol
factory.overflowed = False
# Try to make a second connection again, now that we have an overflow
# protocol. Note that overflow connections count towards the connection
# count.
op = factory.buildProtocol(None)
op.makeConnection(None) # to trigger connectionMade
self.assertTrue(factory.overflowed)
self.assertEqual(2, factory.connectionCount)
# Close the connections.
p.connectionLost(None)
self.assertEqual(1, factory.connectionCount)
op.connectionLost(None)
self.assertEqual(0, factory.connectionCount)
