def test_publisher_failure():
messages = []
publisher = Publisher(messages.extend)
with pytest.raises(NotImplementedError):
with publisher.batch(batch_identifier, begin):
raise NotImplementedError
published_messages = map(reserialize, messages)
assert get_operation(get_operation(published_messages[0])) == begin
assert get_operation(get_operation(published_messages[1])) == rollback
# Ensure it actually generates valid data.
assert list(states.validate(published_messages))
assert list(sequences.validate(published_messages))
for i, message in enumerate(published_messages):
assert message.header.publisher == publisher.id
assert message.header.sequence == i
# Write another message to ensure that the publisher can continue to be used.
assert len(messages) == 2
publisher.publish()
assert len(messages) == 3
assert messages[2].header.sequence == 2
def test_incorrect_sequence_start():
messages = [
Message(header=build_header(1)),
]
stream = validate(messages)
with pytest.raises(InvalidSequenceStartError):
next(stream)
def test_missing_message():
messages = [Message(header=build_header(0)), Message(header=build_header(2))]
stream = validate(messages)
assert next(stream) is messages[0]
with pytest.raises(SequencingError):
next(stream)
def test_simple_sequence():
messages = [
Message(header=build_header(0)),
Message(header=build_header(1)),
Message(header=build_header(2)),
]
stream = validate(messages)
assert list(stream) == messages
def test_duplicate_message():
messages = [
Message(header=build_header(0)),
Message(header=build_header(1)),
Message(header=build_header(1)),
Message(header=build_header(2)),
]
stream = validate(messages)
assert list(stream) == [messages[0], messages[1], messages[3]]
def test_duplicate_message():
messages = [
Message(header=build_header(0)),
Message(header=build_header(1)),
Message(header=build_header(1)),
Message(header=build_header(2)),
]
stream = validate(messages)
assert list(stream) == [messages[0], messages[1], messages[3]]
def test_repeated_sequence():
messages = [
Message(header=build_header(0, timestamp=Timestamp(seconds=0, nanos=0))),
Message(header=build_header(0, timestamp=Timestamp(seconds=1, nanos=0))),
]
stream = validate(messages)
assert next(stream) is messages[0]
with pytest.raises(RepeatedSequenceError):
next(stream)
def test_missing_message():
messages = [
Message(header=build_header(0)),
Message(header=build_header(2)),
]
stream = validate(messages)
assert next(stream) is messages[0]
with pytest.raises(SequencingError):
next(stream)
def test_repeated_sequence():
messages = [
Message(header=build_header(0, timestamp=Timestamp(seconds=0, nanos=0))),
Message(header=build_header(0, timestamp=Timestamp(seconds=1, nanos=0))),
]
stream = validate(messages)
assert next(stream) is messages[0]
with pytest.raises(RepeatedSequenceError):
next(stream)
def test_invalid_multiplexed_sequence():
messages = [
Message(header=build_header(0, publisher="a")),
Message(header=build_header(1, publisher="a")),
Message(header=build_header(0, publisher="b")),
Message(header=build_header(2, publisher="a")),
]
stream = validate(messages)
assert next(stream) is messages[0]
assert next(stream) is messages[1]
assert next(stream) is messages[2]
with pytest.raises(InvalidPublisher):
next(stream)
def test_invalid_multiplexed_sequence():
messages = [
Message(header=build_header(0, publisher='a')),
Message(header=build_header(1, publisher='a')),
Message(header=build_header(0, publisher='b')),
Message(header=build_header(2, publisher='a')),
]
stream = validate(messages)
assert next(stream) is messages[0]
assert next(stream) is messages[1]
assert next(stream) is messages[2]
with pytest.raises(InvalidPublisher):
next(stream)
def test_out_of_order_message():
messages = [
Message(header=build_header(0)),
Message(header=build_header(1)),
Message(header=build_header(2)),
Message(header=build_header(1)),
]
stream = validate(messages)
assert next(stream) is messages[0]
assert next(stream) is messages[1]
assert next(stream) is messages[2]
with pytest.raises(SequencingError):
next(stream)
def test_out_of_order_message():
messages = [
Message(header=build_header(0)),
Message(header=build_header(1)),
Message(header=build_header(2)),
Message(header=build_header(1)),
]
stream = validate(messages)
assert next(stream) is messages[0]
assert next(stream) is messages[1]
assert next(stream) is messages[2]
with pytest.raises(SequencingError):
next(stream)
def test_publisher():
messages = []
publisher = Publisher(messages.extend)
with publisher.batch(batch_identifier, begin) as publish:
publish(mutation)
published_messages = map(reserialize, messages)
assert get_operation(get_operation(published_messages[0])) == begin
assert get_operation(get_operation(published_messages[1])) == mutation
assert get_operation(get_operation(published_messages[2])) == commit
for i, message in enumerate(published_messages):
assert message.header.publisher == publisher.id
assert message.header.sequence == i
# Ensure it actually generates valid data.
assert list(states.validate(published_messages))
assert list(sequences.validate(published_messages))
def test_incorrect_sequence_start():
messages = [Message(header=build_header(1))]
stream = validate(messages)
with pytest.raises(InvalidSequenceStartError):
next(stream)
def test_simple_sequence():
messages = [Message(header=build_header(0)), Message(header=build_header(1)), Message(header=build_header(2))]
stream = validate(messages)
assert list(stream) == messages
