class StateTestCase(unittest.TestCase):
def setUp(self):
self.persistence = Mock(spec=[
"get_unresolved_state_tree",
"update_current_state",
"get_latest_pdus_in_context",
"get_current_state_pdu",
"get_pdu",
])
self.replication = Mock(spec=["get_pdu"])
hs = Mock(spec=["get_datastore", "get_replication_layer"])
hs.get_datastore.return_value = self.persistence
hs.get_replication_layer.return_value = self.replication
hs.hostname = "bob.com"
self.state = StateHandler(hs)
@defer.inlineCallbacks
def test_new_state_key(self):
# We've never seen anything for this state before
new_pdu = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu], [])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_direct_overwrite(self):
# We do a direct overwriting of the old state, i.e., the new state
# points to the old state.
old_pdu = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("B", "test", "mem", "x", "A", 5)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu], [old_pdu])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_fail(self):
# We try to update the state based on an outdated state, and have a
# too low power level.
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 5)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertFalse(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(0, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_succeed(self):
# We try to update the state based on an outdated state, but have
# sufficient power level to force the update.
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 15)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_equal_same_len(self):
# We try to update the state based on an outdated state, the power
# levels are the same and so are the branch lengths
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 10)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_equal_diff_len(self):
# We try to update the state based on an outdated state, the power
# levels are the same but the branch length of the new one is longer.
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
old_pdu_3 = new_fake_pdu_entry("C", "test", "mem", "x", "A", 10)
new_pdu = new_fake_pdu_entry("D", "test", "mem", "x", "C", 10)
self.persistence.get_unresolved_state_tree.return_value = (
ReturnType([new_pdu, old_pdu_3, old_pdu_1], [old_pdu_2, old_pdu_1])
)
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_missing_pdu(self):
# We try to update state against a PDU we haven't yet seen,
# triggering a get_pdu request
# The pdu we haven't seen
old_pdu_1 = new_fake_pdu_entry("A", "test", "mem", "x", None, 10)
old_pdu_2 = new_fake_pdu_entry("B", "test", "mem", "x", None, 10)
new_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 20)
# The return_value of `get_unresolved_state_tree`, which changes after
# the call to get_pdu
tree_to_return = [ReturnType([new_pdu], [old_pdu_2])]
def return_tree(p):
return tree_to_return[0]
def set_return_tree(*args, **kwargs):
tree_to_return[0] = ReturnType(
[new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1]
)
self.persistence.get_unresolved_state_tree.side_effect = return_tree
self.replication.get_pdu.side_effect = set_return_tree
self.persistence.get_pdu.return_value = None
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_with(
new_pdu
)
self.assertEquals(
2, self.persistence.get_unresolved_state_tree.call_count
)
self.assertEqual(1, self.persistence.update_current_state.call_count)
@defer.inlineCallbacks
def test_new_event(self):
event = Mock()
event.event_id = "12123123@test"
state_pdu = new_fake_pdu_entry("C", "test", "mem", "x", "A", 20)
snapshot = Mock()
snapshot.prev_state_pdu = state_pdu
event_id = "*****@*****.**"
def fill_out_prev_events(event):
event.prev_events = [event_id]
event.depth = 6
snapshot.fill_out_prev_events = fill_out_prev_events
yield self.state.handle_new_event(event, snapshot)
self.assertLess(5, event.depth)
self.assertEquals(1, len(event.prev_events))
prev_id = event.prev_events[0]
self.assertEqual(event_id, prev_id)
self.assertEqual(
encode_event_id(state_pdu.pdu_id, state_pdu.origin),
event.prev_state
)
class StateTestCase(unittest.TestCase):
def setUp(self):
self.persistence = Mock(spec=[
"get_unresolved_state_tree",
"update_current_state",
"get_latest_pdus_in_context",
"get_current_state_pdu",
"get_pdu",
"get_power_level",
])
self.replication = Mock(spec=["get_pdu"])
hs = Mock(spec=["get_datastore", "get_replication_layer"])
hs.get_datastore.return_value = self.persistence
hs.get_replication_layer.return_value = self.replication
hs.hostname = "bob.com"
self.state = StateHandler(hs)
@defer.inlineCallbacks
def test_new_state_key(self):
# We've never seen anything for this state before
new_pdu = new_fake_pdu("A", "test", "mem", "x", None, "u")
self.persistence.get_power_level.side_effect = _gen_get_power_level({})
self.persistence.get_unresolved_state_tree.return_value = ((ReturnType(
[new_pdu], []), None))
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_direct_overwrite(self):
# We do a direct overwriting of the old state, i.e., the new state
# points to the old state.
old_pdu = new_fake_pdu("A", "test", "mem", "x", None, "u1")
new_pdu = new_fake_pdu("B", "test", "mem", "x", "A", "u2")
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
5,
})
self.persistence.get_unresolved_state_tree.return_value = ((ReturnType(
[new_pdu, old_pdu], [old_pdu]), None))
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_overwrite(self):
old_pdu_1 = new_fake_pdu("A", "test", "mem", "x", None, "u1")
old_pdu_2 = new_fake_pdu("B", "test", "mem", "x", "A", "u2")
new_pdu = new_fake_pdu("C", "test", "mem", "x", "B", "u3")
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
5,
"u3":
0,
})
self.persistence.get_unresolved_state_tree.return_value = ((ReturnType(
[new_pdu, old_pdu_2, old_pdu_1], [old_pdu_1]), None))
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_fail(self):
# We try to update the state based on an outdated state, and have a
# too low power level.
old_pdu_1 = new_fake_pdu("A", "test", "mem", "x", None, "u1")
old_pdu_2 = new_fake_pdu("B", "test", "mem", "x", None, "u2")
new_pdu = new_fake_pdu("C", "test", "mem", "x", "A", "u3")
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
10,
"u3":
5,
})
self.persistence.get_unresolved_state_tree.return_value = ((ReturnType(
[new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1]), None))
is_new = yield self.state.handle_new_state(new_pdu)
self.assertFalse(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu)
self.assertEqual(0, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_succeed(self):
# We try to update the state based on an outdated state, but have
# sufficient power level to force the update.
old_pdu_1 = new_fake_pdu("A", "test", "mem", "x", None, "u1")
old_pdu_2 = new_fake_pdu("B", "test", "mem", "x", None, "u2")
new_pdu = new_fake_pdu("C", "test", "mem", "x", "A", "u3")
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
10,
"u3":
15,
})
self.persistence.get_unresolved_state_tree.return_value = ((ReturnType(
[new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1]), None))
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_equal_same_len(self):
# We try to update the state based on an outdated state, the power
# levels are the same and so are the branch lengths
old_pdu_1 = new_fake_pdu("A", "test", "mem", "x", None, "u1")
old_pdu_2 = new_fake_pdu("B", "test", "mem", "x", None, "u2")
new_pdu = new_fake_pdu("C", "test", "mem", "x", "A", "u3")
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
10,
"u3":
10,
})
self.persistence.get_unresolved_state_tree.return_value = ((ReturnType(
[new_pdu, old_pdu_1], [old_pdu_2, old_pdu_1]), None))
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_power_level_equal_diff_len(self):
# We try to update the state based on an outdated state, the power
# levels are the same but the branch length of the new one is longer.
old_pdu_1 = new_fake_pdu("A", "test", "mem", "x", None, "u1")
old_pdu_2 = new_fake_pdu("B", "test", "mem", "x", None, "u2")
old_pdu_3 = new_fake_pdu("C", "test", "mem", "x", "A", "u3")
new_pdu = new_fake_pdu("D", "test", "mem", "x", "C", "u4")
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
10,
"u3":
10,
"u4":
10,
})
self.persistence.get_unresolved_state_tree.return_value = ((ReturnType(
[new_pdu, old_pdu_3, old_pdu_1], [old_pdu_2, old_pdu_1]), None))
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_missing_pdu(self):
# We try to update state against a PDU we haven't yet seen,
# triggering a get_pdu request
# The pdu we haven't seen
old_pdu_1 = new_fake_pdu("A", "test", "mem", "x", None, "u1", depth=0)
old_pdu_2 = new_fake_pdu("B", "test", "mem", "x", "A", "u2", depth=1)
new_pdu = new_fake_pdu("C", "test", "mem", "x", "A", "u3", depth=2)
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
10,
"u3":
20,
})
# The return_value of `get_unresolved_state_tree`, which changes after
# the call to get_pdu
tree_to_return = [(ReturnType([new_pdu], [old_pdu_2]), 0)]
def return_tree(p):
return tree_to_return[0]
def set_return_tree(destination, pdu_origin, pdu_id, outlier=False):
tree_to_return[0] = (ReturnType([new_pdu, old_pdu_1],
[old_pdu_2, old_pdu_1]), None)
return defer.succeed(None)
self.persistence.get_unresolved_state_tree.side_effect = return_tree
self.replication.get_pdu.side_effect = set_return_tree
self.persistence.get_pdu.return_value = None
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.replication.get_pdu.assert_called_with(
destination=new_pdu.origin,
pdu_origin=old_pdu_1.origin,
pdu_id=old_pdu_1.pdu_id,
outlier=True)
self.persistence.get_unresolved_state_tree.assert_called_with(new_pdu)
self.assertEquals(
2, self.persistence.get_unresolved_state_tree.call_count)
self.assertEqual(1, self.persistence.update_current_state.call_count)
@defer.inlineCallbacks
def test_missing_pdu_depth_1(self):
# We try to update state against a PDU we haven't yet seen,
# triggering a get_pdu request
# The pdu we haven't seen
old_pdu_1 = new_fake_pdu("A", "test", "mem", "x", None, "u1", depth=0)
old_pdu_2 = new_fake_pdu("B", "test", "mem", "x", "A", "u2", depth=2)
old_pdu_3 = new_fake_pdu("C", "test", "mem", "x", "B", "u3", depth=3)
new_pdu = new_fake_pdu("D", "test", "mem", "x", "A", "u4", depth=4)
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
10,
"u3":
10,
"u4":
20,
})
# The return_value of `get_unresolved_state_tree`, which changes after
# the call to get_pdu
tree_to_return = [
(ReturnType([new_pdu], [old_pdu_3]), 0),
(ReturnType([new_pdu, old_pdu_1], [old_pdu_3]), 1),
(ReturnType([new_pdu, old_pdu_1],
[old_pdu_3, old_pdu_2, old_pdu_1]), None),
]
to_return = [0]
def return_tree(p):
return tree_to_return[to_return[0]]
def set_return_tree(destination, pdu_origin, pdu_id, outlier=False):
to_return[0] += 1
return defer.succeed(None)
self.persistence.get_unresolved_state_tree.side_effect = return_tree
self.replication.get_pdu.side_effect = set_return_tree
self.persistence.get_pdu.return_value = None
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.assertEqual(2, self.replication.get_pdu.call_count)
self.replication.get_pdu.assert_has_calls([
mock.call(destination=new_pdu.origin,
pdu_origin=old_pdu_1.origin,
pdu_id=old_pdu_1.pdu_id,
outlier=True),
mock.call(destination=old_pdu_3.origin,
pdu_origin=old_pdu_2.origin,
pdu_id=old_pdu_2.pdu_id,
outlier=True),
])
self.persistence.get_unresolved_state_tree.assert_called_with(new_pdu)
self.assertEquals(
3, self.persistence.get_unresolved_state_tree.call_count)
self.assertEqual(1, self.persistence.update_current_state.call_count)
@defer.inlineCallbacks
def test_missing_pdu_depth_2(self):
# We try to update state against a PDU we haven't yet seen,
# triggering a get_pdu request
# The pdu we haven't seen
old_pdu_1 = new_fake_pdu("A", "test", "mem", "x", None, "u1", depth=0)
old_pdu_2 = new_fake_pdu("B", "test", "mem", "x", "A", "u2", depth=2)
old_pdu_3 = new_fake_pdu("C", "test", "mem", "x", "B", "u3", depth=3)
new_pdu = new_fake_pdu("D", "test", "mem", "x", "A", "u4", depth=1)
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
10,
"u2":
10,
"u3":
10,
"u4":
20,
})
# The return_value of `get_unresolved_state_tree`, which changes after
# the call to get_pdu
tree_to_return = [
(
ReturnType([new_pdu], [old_pdu_3]),
1,
),
(
ReturnType([new_pdu], [old_pdu_3, old_pdu_2]),
0,
),
(ReturnType([new_pdu, old_pdu_1],
[old_pdu_3, old_pdu_2, old_pdu_1]), None),
]
to_return = [0]
def return_tree(p):
return tree_to_return[to_return[0]]
def set_return_tree(destination, pdu_origin, pdu_id, outlier=False):
to_return[0] += 1
return defer.succeed(None)
self.persistence.get_unresolved_state_tree.side_effect = return_tree
self.replication.get_pdu.side_effect = set_return_tree
self.persistence.get_pdu.return_value = None
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.assertEqual(2, self.replication.get_pdu.call_count)
self.replication.get_pdu.assert_has_calls([
mock.call(destination=old_pdu_3.origin,
pdu_origin=old_pdu_2.origin,
pdu_id=old_pdu_2.pdu_id,
outlier=True),
mock.call(destination=new_pdu.origin,
pdu_origin=old_pdu_1.origin,
pdu_id=old_pdu_1.pdu_id,
outlier=True),
])
self.persistence.get_unresolved_state_tree.assert_called_with(new_pdu)
self.assertEquals(
3, self.persistence.get_unresolved_state_tree.call_count)
self.assertEqual(1, self.persistence.update_current_state.call_count)
@defer.inlineCallbacks
def test_no_common_ancestor(self):
# We do a direct overwriting of the old state, i.e., the new state
# points to the old state.
old_pdu = new_fake_pdu("A", "test", "mem", "x", None, "u1")
new_pdu = new_fake_pdu("B", "test", "mem", "x", None, "u2")
self.persistence.get_power_level.side_effect = _gen_get_power_level({
"u1":
5,
"u2":
10,
})
self.persistence.get_unresolved_state_tree.return_value = ((ReturnType(
[new_pdu], [old_pdu]), None))
is_new = yield self.state.handle_new_state(new_pdu)
self.assertTrue(is_new)
self.persistence.get_unresolved_state_tree.assert_called_once_with(
new_pdu)
self.assertEqual(1, self.persistence.update_current_state.call_count)
self.assertFalse(self.replication.get_pdu.called)
@defer.inlineCallbacks
def test_new_event(self):
event = Mock()
event.event_id = "12123123@test"
state_pdu = new_fake_pdu("C", "test", "mem", "x", "A", 20)
snapshot = Mock()
snapshot.prev_state_pdu = state_pdu
event_id = "*****@*****.**"
def fill_out_prev_events(event):
event.prev_events = [event_id]
event.depth = 6
snapshot.fill_out_prev_events = fill_out_prev_events
yield self.state.handle_new_event(event, snapshot)
self.assertLess(5, event.depth)
self.assertEquals(1, len(event.prev_events))
prev_id = event.prev_events[0]
self.assertEqual(event_id, prev_id)
self.assertEqual(encode_event_id(state_pdu.pdu_id, state_pdu.origin),
event.prev_state)
