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
|
import unittest
from urllib3.response import HTTPResponse
from urllib3.packages.six.moves import xrange
from urllib3.util.retry import Retry
from urllib3.exceptions import (
ConnectTimeoutError,
MaxRetryError,
ReadTimeoutError,
ResponseError,
)
class RetryTest(unittest.TestCase):
def test_string(self):
""" Retry string representation looks the way we expect """
retry = Retry()
self.assertEqual(str(retry), 'Retry(total=10, connect=None, read=None, redirect=None)')
for _ in range(3):
retry = retry.increment()
self.assertEqual(str(retry), 'Retry(total=7, connect=None, read=None, redirect=None)')
def test_retry_both_specified(self):
"""Total can win if it's lower than the connect value"""
error = ConnectTimeoutError()
retry = Retry(connect=3, total=2)
retry = retry.increment(error=error)
retry = retry.increment(error=error)
try:
retry.increment(error=error)
self.fail("Failed to raise error.")
except MaxRetryError as e:
self.assertEqual(e.reason, error)
def test_retry_higher_total_loses(self):
""" A lower connect timeout than the total is honored """
error = ConnectTimeoutError()
retry = Retry(connect=2, total=3)
retry = retry.increment(error=error)
retry = retry.increment(error=error)
self.assertRaises(MaxRetryError, retry.increment, error=error)
def test_retry_higher_total_loses_vs_read(self):
""" A lower read timeout than the total is honored """
error = ReadTimeoutError(None, "/", "read timed out")
retry = Retry(read=2, total=3)
retry = retry.increment(error=error)
retry = retry.increment(error=error)
self.assertRaises(MaxRetryError, retry.increment, error=error)
def test_retry_total_none(self):
""" if Total is none, connect error should take precedence """
error = ConnectTimeoutError()
retry = Retry(connect=2, total=None)
retry = retry.increment(error=error)
retry = retry.increment(error=error)
try:
retry.increment(error=error)
self.fail("Failed to raise error.")
except MaxRetryError as e:
self.assertEqual(e.reason, error)
error = ReadTimeoutError(None, "/", "read timed out")
retry = Retry(connect=2, total=None)
retry = retry.increment(error=error)
retry = retry.increment(error=error)
retry = retry.increment(error=error)
self.assertFalse(retry.is_exhausted())
def test_retry_default(self):
""" If no value is specified, should retry connects 3 times """
retry = Retry()
self.assertEqual(retry.total, 10)
self.assertEqual(retry.connect, None)
self.assertEqual(retry.read, None)
self.assertEqual(retry.redirect, None)
error = ConnectTimeoutError()
retry = Retry(connect=1)
retry = retry.increment(error=error)
self.assertRaises(MaxRetryError, retry.increment, error=error)
retry = Retry(connect=1)
retry = retry.increment(error=error)
self.assertFalse(retry.is_exhausted())
self.assertTrue(Retry(0).raise_on_redirect)
self.assertFalse(Retry(False).raise_on_redirect)
def test_retry_read_zero(self):
""" No second chances on read timeouts, by default """
error = ReadTimeoutError(None, "/", "read timed out")
retry = Retry(read=0)
try:
retry.increment(error=error)
self.fail("Failed to raise error.")
except MaxRetryError as e:
self.assertEqual(e.reason, error)
def test_backoff(self):
""" Backoff is computed correctly """
max_backoff = Retry.BACKOFF_MAX
retry = Retry(total=100, backoff_factor=0.2)
self.assertEqual(retry.get_backoff_time(), 0) # First request
retry = retry.increment()
self.assertEqual(retry.get_backoff_time(), 0) # First retry
retry = retry.increment()
self.assertEqual(retry.backoff_factor, 0.2)
self.assertEqual(retry.total, 98)
self.assertEqual(retry.get_backoff_time(), 0.4) # Start backoff
retry = retry.increment()
self.assertEqual(retry.get_backoff_time(), 0.8)
retry = retry.increment()
self.assertEqual(retry.get_backoff_time(), 1.6)
for i in xrange(10):
retry = retry.increment()
self.assertEqual(retry.get_backoff_time(), max_backoff)
def test_zero_backoff(self):
retry = Retry()
self.assertEqual(retry.get_backoff_time(), 0)
retry = retry.increment()
retry = retry.increment()
self.assertEqual(retry.get_backoff_time(), 0)
def test_sleep(self):
# sleep a very small amount of time so our code coverage is happy
retry = Retry(backoff_factor=0.0001)
retry = retry.increment()
retry = retry.increment()
retry.sleep()
def test_status_forcelist(self):
retry = Retry(status_forcelist=xrange(500,600))
self.assertFalse(retry.is_forced_retry('GET', status_code=200))
self.assertFalse(retry.is_forced_retry('GET', status_code=400))
self.assertTrue(retry.is_forced_retry('GET', status_code=500))
retry = Retry(total=1, status_forcelist=[418])
self.assertFalse(retry.is_forced_retry('GET', status_code=400))
self.assertTrue(retry.is_forced_retry('GET', status_code=418))
def test_exhausted(self):
self.assertFalse(Retry(0).is_exhausted())
self.assertTrue(Retry(-1).is_exhausted())
self.assertEqual(Retry(1).increment().total, 0)
def test_disabled(self):
self.assertRaises(MaxRetryError, Retry(-1).increment)
self.assertRaises(MaxRetryError, Retry(0).increment)
def test_error_message(self):
retry = Retry(total=0)
try:
retry = retry.increment(error=ReadTimeoutError(None, "/", "read timed out"))
raise AssertionError("Should have raised a MaxRetryError")
except MaxRetryError as e:
assert 'Caused by redirect' not in str(e)
self.assertEqual(str(e.reason), 'None: read timed out')
retry = Retry(total=1)
try:
retry = retry.increment('POST', '/')
retry = retry.increment('POST', '/')
raise AssertionError("Should have raised a MaxRetryError")
except MaxRetryError as e:
assert 'Caused by redirect' not in str(e)
self.assertTrue(isinstance(e.reason, ResponseError),
"%s should be a ResponseError" % e.reason)
self.assertEqual(str(e.reason), ResponseError.GENERIC_ERROR)
retry = Retry(total=1)
try:
response = HTTPResponse(status=500)
retry = retry.increment('POST', '/', response=response)
retry = retry.increment('POST', '/', response=response)
raise AssertionError("Should have raised a MaxRetryError")
except MaxRetryError as e:
assert 'Caused by redirect' not in str(e)
msg = ResponseError.SPECIFIC_ERROR.format(status_code=500)
self.assertEqual(str(e.reason), msg)
retry = Retry(connect=1)
try:
retry = retry.increment(error=ConnectTimeoutError('conntimeout'))
retry = retry.increment(error=ConnectTimeoutError('conntimeout'))
raise AssertionError("Should have raised a MaxRetryError")
except MaxRetryError as e:
assert 'Caused by redirect' not in str(e)
self.assertEqual(str(e.reason), 'conntimeout')
|