def test_remove_contact_with_cached_replacement(self):
"""
Ensures that the removed contact is replaced by the most up-to-date
contact in the affected k-bucket's cache.
"""
parent_node_id = 'abc'
r = RoutingTable(parent_node_id)
contact1 = Contact('a', '192.168.0.1', 9999, self.version, 0)
contact2 = Contact('b', '192.168.0.2', 9999, self.version, 0)
r.add_contact(contact1)
# Contact 2 will have the wrong number of failedRPCs
r.add_contact(contact2)
contact2.failed_RPCs = constants.ALLOWED_RPC_FAILS
# Add something into the cache.
contact3 = Contact('c', '192.168.0.3', 9999, self.version, 0)
r._replacement_cache[0] = [contact3, ]
# Sanity check
self.assertEqual(len(r._buckets[0]), 2)
self.assertEqual(len(r._replacement_cache[0]), 1)
r.remove_contact('b')
self.assertEqual(len(r._buckets[0]), 2)
self.assertEqual(contact1, r._buckets[0]._contacts[0])
self.assertEqual(contact3, r._buckets[0]._contacts[1])
self.assertEqual(len(r._replacement_cache[0]), 0)
def test_remove_contact(self):
"""
Ensures that a contact is removed, given that it's failedRPCs counter
exceeds or is equal to constants.ALLOWED_RPC_FAILS
"""
parent_node_id = 'abc'
r = RoutingTable(parent_node_id)
contact1 = Contact('a', '192.168.0.1', 9999, self.version, 0)
contact2 = Contact('b', '192.168.0.2', 9999, self.version, 0)
r.add_contact(contact1)
# Contact 2 will have the wrong number of failedRPCs
r.add_contact(contact2)
contact2.failed_RPCs = constants.ALLOWED_RPC_FAILS
# Sanity check
self.assertEqual(len(r._buckets[0]), 2)
r.remove_contact('b')
self.assertEqual(len(r._buckets[0]), 1)
self.assertEqual(contact1, r._buckets[0]._contacts[0])