1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
# pylint: skip-file
from __future__ import absolute_import
from errno import EALREADY, EINPROGRESS, EISCONN, ECONNRESET
import socket
import time
import pytest
from kafka.conn import BrokerConnection, ConnectionStates, collect_hosts
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):
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]([])
try:
_socket.send.side_effect = ConnectionError
except NameError:
_socket.send.side_effect = socket.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_disconnected():
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.bind(('127.0.0.1', 0))
port = sock.getsockname()[1]
sock.listen(5)
conn = BrokerConnection('127.0.0.1', port, socket.AF_INET)
timeout = time.time() + 1
while time.time() < timeout:
conn.connect()
if conn.connected():
break
else:
assert False, 'Connection attempt to local socket timed-out ?'
conn.send(MetadataRequest[0]([]))
# Disconnect server socket
sock.close()
# Attempt to receive should mark connection as disconnected
assert conn.connected()
conn.recv()
assert conn.disconnected()
def test_recv_disconnected_too(_socket, conn):
conn.connect()
assert conn.connected()
req = MetadataRequest[0]([])
header = RequestHeader(req, client_id=conn.config['client_id'])
payload_bytes = len(header.encode()) + len(req.encode())
_socket.send.side_effect = [4, payload_bytes]
conn.send(req)
# Empty data on recv means the socket is disconnected
_socket.recv.return_value = b''
# Attempt to receive should mark connection as disconnected
assert conn.connected()
conn.recv()
assert conn.disconnected()
def test_recv(_socket, conn):
pass # TODO
def test_close(conn):
pass # TODO
def test_collect_hosts__happy_path():
hosts = "127.0.0.1:1234,127.0.0.1"
results = collect_hosts(hosts)
assert set(results) == set([
('127.0.0.1', 1234, socket.AF_INET),
('127.0.0.1', 9092, socket.AF_INET),
])
def test_collect_hosts__ipv6():
hosts = "[localhost]:1234,[2001:1000:2000::1],[2001:1000:2000::1]:1234"
results = collect_hosts(hosts)
assert set(results) == set([
('localhost', 1234, socket.AF_INET6),
('2001:1000:2000::1', 9092, socket.AF_INET6),
('2001:1000:2000::1', 1234, socket.AF_INET6),
])
def test_collect_hosts__string_list():
hosts = [
'localhost:1234',
'localhost',
'[localhost]',
'2001::1',
'[2001::1]',
'[2001::1]:1234',
]
results = collect_hosts(hosts)
assert set(results) == set([
('localhost', 1234, socket.AF_UNSPEC),
('localhost', 9092, socket.AF_UNSPEC),
('localhost', 9092, socket.AF_INET6),
('2001::1', 9092, socket.AF_INET6),
('2001::1', 9092, socket.AF_INET6),
('2001::1', 1234, socket.AF_INET6),
])
def test_collect_hosts__with_spaces():
hosts = "localhost:1234, localhost"
results = collect_hosts(hosts)
assert set(results) == set([
('localhost', 1234, socket.AF_UNSPEC),
('localhost', 9092, socket.AF_UNSPEC),
])
|
