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
|
import builtins
import os
import select
import socket
import unittest
import errno
from errno import EEXIST
class SubOSError(OSError):
pass
class SubOSErrorWithInit(OSError):
def __init__(self, message, bar):
self.bar = bar
super().__init__(message)
class SubOSErrorWithNew(OSError):
def __new__(cls, message, baz):
self = super().__new__(cls, message)
self.baz = baz
return self
class SubOSErrorCombinedInitFirst(SubOSErrorWithInit, SubOSErrorWithNew):
pass
class SubOSErrorCombinedNewFirst(SubOSErrorWithNew, SubOSErrorWithInit):
pass
class SubOSErrorWithStandaloneInit(OSError):
def __init__(self):
pass
class HierarchyTest(unittest.TestCase):
def test_builtin_errors(self):
self.assertEqual(OSError.__name__, 'OSError')
self.assertIs(IOError, OSError)
self.assertIs(EnvironmentError, OSError)
def test_socket_errors(self):
self.assertIs(socket.error, IOError)
self.assertIs(socket.gaierror.__base__, OSError)
self.assertIs(socket.herror.__base__, OSError)
self.assertIs(socket.timeout.__base__, OSError)
def test_select_error(self):
self.assertIs(select.error, OSError)
# mmap.error is tested in test_mmap
_pep_map = """
+-- BlockingIOError EAGAIN, EALREADY, EWOULDBLOCK, EINPROGRESS
+-- ChildProcessError ECHILD
+-- ConnectionError
+-- BrokenPipeError EPIPE, ESHUTDOWN
+-- ConnectionAbortedError ECONNABORTED
+-- ConnectionRefusedError ECONNREFUSED
+-- ConnectionResetError ECONNRESET
+-- FileExistsError EEXIST
+-- FileNotFoundError ENOENT
+-- InterruptedError EINTR
+-- IsADirectoryError EISDIR
+-- NotADirectoryError ENOTDIR
+-- PermissionError EACCES, EPERM
+-- ProcessLookupError ESRCH
+-- TimeoutError ETIMEDOUT
"""
def _make_map(s):
_map = {}
for line in s.splitlines():
line = line.strip('+- ')
if not line:
continue
excname, _, errnames = line.partition(' ')
for errname in filter(None, errnames.strip().split(', ')):
_map[getattr(errno, errname)] = getattr(builtins, excname)
return _map
_map = _make_map(_pep_map)
def test_errno_mapping(self):
# The OSError constructor maps errnos to subclasses
# A sample test for the basic functionality
e = OSError(EEXIST, "Bad file descriptor")
self.assertIs(type(e), FileExistsError)
# Exhaustive testing
for errcode, exc in self._map.items():
e = OSError(errcode, "Some message")
self.assertIs(type(e), exc)
othercodes = set(errno.errorcode) - set(self._map)
for errcode in othercodes:
e = OSError(errcode, "Some message")
self.assertIs(type(e), OSError)
def test_try_except(self):
filename = "some_hopefully_non_existing_file"
# This checks that try .. except checks the concrete exception
# (FileNotFoundError) and not the base type specified when
# PyErr_SetFromErrnoWithFilenameObject was called.
# (it is therefore deliberate that it doesn't use assertRaises)
try:
open(filename)
except FileNotFoundError:
pass
else:
self.fail("should have raised a FileNotFoundError")
# Another test for PyErr_SetExcFromWindowsErrWithFilenameObject()
self.assertFalse(os.path.exists(filename))
try:
os.unlink(filename)
except FileNotFoundError:
pass
else:
self.fail("should have raised a FileNotFoundError")
class AttributesTest(unittest.TestCase):
def test_windows_error(self):
if os.name == "nt":
self.assertIn('winerror', dir(OSError))
else:
self.assertNotIn('winerror', dir(OSError))
def test_posix_error(self):
e = OSError(EEXIST, "File already exists", "foo.txt")
self.assertEqual(e.errno, EEXIST)
self.assertEqual(e.args[0], EEXIST)
self.assertEqual(e.strerror, "File already exists")
self.assertEqual(e.filename, "foo.txt")
if os.name == "nt":
self.assertEqual(e.winerror, None)
@unittest.skipUnless(os.name == "nt", "Windows-specific test")
def test_errno_translation(self):
# ERROR_ALREADY_EXISTS (183) -> EEXIST
e = OSError(0, "File already exists", "foo.txt", 183)
self.assertEqual(e.winerror, 183)
self.assertEqual(e.errno, EEXIST)
self.assertEqual(e.args[0], EEXIST)
self.assertEqual(e.strerror, "File already exists")
self.assertEqual(e.filename, "foo.txt")
def test_blockingioerror(self):
args = ("a", "b", "c", "d", "e")
for n in range(6):
e = BlockingIOError(*args[:n])
with self.assertRaises(AttributeError):
e.characters_written
e = BlockingIOError("a", "b", 3)
self.assertEqual(e.characters_written, 3)
e.characters_written = 5
self.assertEqual(e.characters_written, 5)
class ExplicitSubclassingTest(unittest.TestCase):
def test_errno_mapping(self):
# When constructing an OSError subclass, errno mapping isn't done
e = SubOSError(EEXIST, "Bad file descriptor")
self.assertIs(type(e), SubOSError)
def test_init_overridden(self):
e = SubOSErrorWithInit("some message", "baz")
self.assertEqual(e.bar, "baz")
self.assertEqual(e.args, ("some message",))
def test_init_kwdargs(self):
e = SubOSErrorWithInit("some message", bar="baz")
self.assertEqual(e.bar, "baz")
self.assertEqual(e.args, ("some message",))
def test_new_overridden(self):
e = SubOSErrorWithNew("some message", "baz")
self.assertEqual(e.baz, "baz")
self.assertEqual(e.args, ("some message",))
def test_new_kwdargs(self):
e = SubOSErrorWithNew("some message", baz="baz")
self.assertEqual(e.baz, "baz")
self.assertEqual(e.args, ("some message",))
def test_init_new_overridden(self):
e = SubOSErrorCombinedInitFirst("some message", "baz")
self.assertEqual(e.bar, "baz")
self.assertEqual(e.baz, "baz")
self.assertEqual(e.args, ("some message",))
e = SubOSErrorCombinedNewFirst("some message", "baz")
self.assertEqual(e.bar, "baz")
self.assertEqual(e.baz, "baz")
self.assertEqual(e.args, ("some message",))
def test_init_standalone(self):
# __init__ doesn't propagate to OSError.__init__ (see issue #15229)
e = SubOSErrorWithStandaloneInit()
self.assertEqual(e.args, ())
self.assertEqual(str(e), '')
if __name__ == "__main__":
unittest.main()
|
