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import os
import random
import socket
import struct
import mock
import unittest2
from kafka.common import *
from kafka.conn import *
class ConnTest(unittest2.TestCase):
def setUp(self):
self.config = {
'host': 'localhost',
'port': 9090,
'request_id': 0,
'payload': 'test data'
}
# Mocking socket.create_connection will cause _sock to always be a
# MagicMock()
patcher = mock.patch('socket.create_connection', spec=True)
self.MockCreateConn = patcher.start()
# Also mock socket.sendall() to appear successful
self.MockCreateConn().sendall.return_value = None
self.addCleanup(patcher.stop)
self.conn = KafkaConnection(self.config['host'], self.config['port'])
socket.create_connection.reset_mock()
def test_collect_hosts__happy_path(self):
hosts = "localhost:1234,localhost"
results = collect_hosts(hosts)
self.assertEqual(set(results), set([
('localhost', 1234),
('localhost', 9092),
]))
def test_collect_hosts__string_list(self):
hosts = [
'localhost:1234',
'localhost',
]
results = collect_hosts(hosts)
self.assertEqual(set(results), set([
('localhost', 1234),
('localhost', 9092),
]))
def test_collect_hosts__with_spaces(self):
hosts = "localhost:1234, localhost"
results = collect_hosts(hosts)
self.assertEqual(set(results), set([
('localhost', 1234),
('localhost', 9092),
]))
def test_send(self):
self.conn.send(self.config['request_id'], self.config['payload'])
self.conn._sock.sendall.assert_called_with(self.config['payload'])
def test_init_creates_socket_connection(self):
KafkaConnection(self.config['host'], self.config['port'])
socket.create_connection.assert_called_with((self.config['host'], self.config['port']), DEFAULT_SOCKET_TIMEOUT_SECONDS)
def test_init_failure_raises_connection_error(self):
def raise_error(*args):
raise socket.error
assert socket.create_connection is self.MockCreateConn
socket.create_connection.side_effect=raise_error
with self.assertRaises(ConnectionError):
KafkaConnection(self.config['host'], self.config['port'])
def test_send__reconnects_on_dirty_conn(self):
# Dirty the connection
assert self.conn._dirty is False
try:
self.conn._raise_connection_error()
except ConnectionError:
pass
assert self.conn._dirty is True
# Now test that sending attempts to reconnect
self.assertEqual(socket.create_connection.call_count, 0)
self.conn.send(self.config['request_id'], self.config['payload'])
self.assertEqual(socket.create_connection.call_count, 1)
# A second way to dirty it...
self.conn.close()
# Reset the socket call counts
socket.create_connection.reset_mock()
self.assertEqual(socket.create_connection.call_count, 0)
# Now test that sending attempts to reconnect
self.conn.send(self.config['request_id'], self.config['payload'])
self.assertEqual(socket.create_connection.call_count, 1)
def test_send__failure_sets_dirty_connection(self):
def raise_error(*args):
raise socket.error
assert self.conn._dirty is False
assert isinstance(self.conn._sock, mock.Mock)
self.conn._sock.sendall.side_effect=raise_error
try:
self.conn.send(self.config['request_id'], self.config['payload'])
except ConnectionError:
self.assertEquals(self.conn._dirty, True)
def test_recv(self):
# A function to mock _read_bytes
self.conn._mock_sent_size = False
self.conn._mock_data_sent = 0
def mock_socket_recv(num_bytes):
if not self.conn._mock_sent_size:
assert num_bytes == 4
self.conn._mock_sent_size = True
return struct.pack('>i', len(self.config['payload']))
recv_data = struct.pack('>%ds' % num_bytes, self.config['payload'][self.conn._mock_data_sent:self.conn._mock_data_sent+num_bytes])
self.conn._mock_data_sent += num_bytes
return recv_data
with mock.patch.object(self.conn, '_read_bytes', new=mock_socket_recv):
self.assertEquals(self.conn.recv(self.config['request_id']), self.config['payload'])
def test_recv__reconnects_on_dirty_conn(self):
# Dirty the connection
try:
self.conn._raise_connection_error()
except ConnectionError:
pass
assert self.conn._dirty is True
# Now test that recv'ing attempts to reconnect
self.assertEqual(socket.create_connection.call_count, 0)
self.conn._sock.recv.return_value = self.config['payload']
self.conn._read_bytes(len(self.config['payload']))
self.assertEqual(socket.create_connection.call_count, 1)
# A second way to dirty it...
self.conn.close()
# Reset the socket call counts
socket.create_connection.reset_mock()
self.assertEqual(socket.create_connection.call_count, 0)
# Now test that recv'ing attempts to reconnect
self.conn._read_bytes(len(self.config['payload']))
self.assertEqual(socket.create_connection.call_count, 1)
@unittest2.skip("Not Implemented")
def test_recv__failure_sets_dirty_connection(self):
pass
@unittest2.skip("Not Implemented")
def test_recv__doesnt_consume_extra_data_in_stream(self):
pass
@unittest2.skip("Not Implemented")
def test_close__object_is_reusable(self):
pass
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