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# pylint: skip-file
from __future__ import absolute_import
from errno import EALREADY, EINPROGRESS, EISCONN, ECONNRESET
import time
import pytest
from kafka.conn import BrokerConnection, ConnectionStates
from kafka.protocol.api import RequestHeader
from kafka.protocol.metadata import MetadataRequest
import kafka.common as Errors
@pytest.fixture
def socket(mocker):
socket = mocker.MagicMock()
socket.connect_ex.return_value = 0
mocker.patch('socket.socket', return_value=socket)
return socket
@pytest.fixture
def conn(socket):
from socket import AF_INET
conn = BrokerConnection('localhost', 9092, socket.AF_INET)
return conn
@pytest.mark.parametrize("states", [
(([EINPROGRESS, EALREADY], ConnectionStates.CONNECTING),),
(([EALREADY, EALREADY], ConnectionStates.CONNECTING),),
(([0], ConnectionStates.CONNECTED),),
(([EINPROGRESS, EALREADY], ConnectionStates.CONNECTING),
([ECONNRESET], ConnectionStates.DISCONNECTED)),
(([EINPROGRESS, EALREADY], ConnectionStates.CONNECTING),
([EALREADY], ConnectionStates.CONNECTING),
([EISCONN], ConnectionStates.CONNECTED)),
])
def test_connect(socket, conn, states):
assert conn.state is ConnectionStates.DISCONNECTED
for errno, state in states:
socket.connect_ex.side_effect = errno
conn.connect()
assert conn.state is state
def test_connect_timeout(socket, conn):
assert conn.state is ConnectionStates.DISCONNECTED
# Initial connect returns EINPROGRESS
# immediate inline connect returns EALREADY
# second explicit connect returns EALREADY
# third explicit connect returns EALREADY and times out via last_attempt
socket.connect_ex.side_effect = [EINPROGRESS, EALREADY, EALREADY, EALREADY]
conn.connect()
assert conn.state is ConnectionStates.CONNECTING
conn.connect()
assert conn.state is ConnectionStates.CONNECTING
conn.last_attempt = 0
conn.connect()
assert conn.state is ConnectionStates.DISCONNECTED
def test_blacked_out(conn):
assert conn.blacked_out() is False
conn.last_attempt = time.time()
assert conn.blacked_out() is True
def test_connected(conn):
assert conn.connected() is False
conn.state = ConnectionStates.CONNECTED
assert conn.connected() is True
def test_connecting(conn):
assert conn.connecting() is False
conn.state = ConnectionStates.CONNECTING
assert conn.connecting() is True
conn.state = ConnectionStates.CONNECTED
assert conn.connecting() is False
def test_send_disconnected(conn):
conn.state = ConnectionStates.DISCONNECTED
f = conn.send('foobar')
assert f.failed() is True
assert isinstance(f.exception, Errors.ConnectionError)
def test_send_connecting(conn):
conn.state = ConnectionStates.CONNECTING
f = conn.send('foobar')
assert f.failed() is True
assert isinstance(f.exception, Errors.NodeNotReadyError)
def test_send_max_ifr(conn):
conn.state = ConnectionStates.CONNECTED
max_ifrs = conn.config['max_in_flight_requests_per_connection']
for _ in range(max_ifrs):
conn.in_flight_requests.append('foo')
f = conn.send('foobar')
assert f.failed() is True
assert isinstance(f.exception, Errors.TooManyInFlightRequests)
def test_send_no_response(socket, conn):
conn.connect()
assert conn.state is ConnectionStates.CONNECTED
req = MetadataRequest[0]([])
header = RequestHeader(req, client_id=conn.config['client_id'])
payload_bytes = len(header.encode()) + len(req.encode())
third = payload_bytes // 3
remainder = payload_bytes % 3
socket.send.side_effect = [4, third, third, third, remainder]
assert len(conn.in_flight_requests) == 0
f = conn.send(req, expect_response=False)
assert f.succeeded() is True
assert f.value is None
assert len(conn.in_flight_requests) == 0
def test_send_response(socket, conn):
conn.connect()
assert conn.state is ConnectionStates.CONNECTED
req = MetadataRequest[0]([])
header = RequestHeader(req, client_id=conn.config['client_id'])
payload_bytes = len(header.encode()) + len(req.encode())
third = payload_bytes // 3
remainder = payload_bytes % 3
socket.send.side_effect = [4, third, third, third, remainder]
assert len(conn.in_flight_requests) == 0
f = conn.send(req)
assert f.is_done is False
assert len(conn.in_flight_requests) == 1
def test_send_error(socket, conn):
conn.connect()
assert conn.state is ConnectionStates.CONNECTED
req = MetadataRequest[0]([])
header = RequestHeader(req, client_id=conn.config['client_id'])
try:
error = ConnectionError
except NameError:
from socket import error
socket.send.side_effect = error
f = conn.send(req)
assert f.failed() is True
assert isinstance(f.exception, Errors.ConnectionError)
assert socket.close.call_count == 1
assert conn.state is ConnectionStates.DISCONNECTED
def test_can_send_more(conn):
assert conn.can_send_more() is True
max_ifrs = conn.config['max_in_flight_requests_per_connection']
for _ in range(max_ifrs):
assert conn.can_send_more() is True
conn.in_flight_requests.append('foo')
assert conn.can_send_more() is False
def test_recv(socket, conn):
pass # TODO
def test_close(conn):
pass # TODO
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