Python code coverage for Lib/test/test_exception_hierarchy.py

#	count	content
1	n/a	import builtins
2	n/a	import os
3	n/a	import select
4	n/a	import socket
5	n/a	import unittest
6	n/a	import errno
7	n/a	from errno import EEXIST
8	n/a
9	n/a
10	n/a	class SubOSError(OSError):
11	n/a	pass
12	n/a
13	n/a	class SubOSErrorWithInit(OSError):
14	n/a	def __init__(self, message, bar):
15	n/a	self.bar = bar
16	n/a	super().__init__(message)
17	n/a
18	n/a	class SubOSErrorWithNew(OSError):
19	n/a	def __new__(cls, message, baz):
20	n/a	self = super().__new__(cls, message)
21	n/a	self.baz = baz
22	n/a	return self
23	n/a
24	n/a	class SubOSErrorCombinedInitFirst(SubOSErrorWithInit, SubOSErrorWithNew):
25	n/a	pass
26	n/a
27	n/a	class SubOSErrorCombinedNewFirst(SubOSErrorWithNew, SubOSErrorWithInit):
28	n/a	pass
29	n/a
30	n/a	class SubOSErrorWithStandaloneInit(OSError):
31	n/a	def __init__(self):
32	n/a	pass
33	n/a
34	n/a
35	n/a	class HierarchyTest(unittest.TestCase):
36	n/a
37	n/a	def test_builtin_errors(self):
38	n/a	self.assertEqual(OSError.__name__, 'OSError')
39	n/a	self.assertIs(IOError, OSError)
40	n/a	self.assertIs(EnvironmentError, OSError)
41	n/a
42	n/a	def test_socket_errors(self):
43	n/a	self.assertIs(socket.error, IOError)
44	n/a	self.assertIs(socket.gaierror.__base__, OSError)
45	n/a	self.assertIs(socket.herror.__base__, OSError)
46	n/a	self.assertIs(socket.timeout.__base__, OSError)
47	n/a
48	n/a	def test_select_error(self):
49	n/a	self.assertIs(select.error, OSError)
50	n/a
51	n/a	# mmap.error is tested in test_mmap
52	n/a
53	n/a	_pep_map = """
54	n/a	+-- BlockingIOError EAGAIN, EALREADY, EWOULDBLOCK, EINPROGRESS
55	n/a	+-- ChildProcessError ECHILD
56	n/a	+-- ConnectionError
57	n/a	+-- BrokenPipeError EPIPE, ESHUTDOWN
58	n/a	+-- ConnectionAbortedError ECONNABORTED
59	n/a	+-- ConnectionRefusedError ECONNREFUSED
60	n/a	+-- ConnectionResetError ECONNRESET
61	n/a	+-- FileExistsError EEXIST
62	n/a	+-- FileNotFoundError ENOENT
63	n/a	+-- InterruptedError EINTR
64	n/a	+-- IsADirectoryError EISDIR
65	n/a	+-- NotADirectoryError ENOTDIR
66	n/a	+-- PermissionError EACCES, EPERM
67	n/a	+-- ProcessLookupError ESRCH
68	n/a	+-- TimeoutError ETIMEDOUT
69	n/a	"""
70	n/a	def _make_map(s):
71	n/a	_map = {}
72	n/a	for line in s.splitlines():
73	n/a	line = line.strip('+- ')
74	n/a	if not line:
75	n/a	continue
76	n/a	excname, _, errnames = line.partition(' ')
77	n/a	for errname in filter(None, errnames.strip().split(', ')):
78	n/a	_map[getattr(errno, errname)] = getattr(builtins, excname)
79	n/a	return _map
80	n/a	_map = _make_map(_pep_map)
81	n/a
82	n/a	def test_errno_mapping(self):
83	n/a	# The OSError constructor maps errnos to subclasses
84	n/a	# A sample test for the basic functionality
85	n/a	e = OSError(EEXIST, "Bad file descriptor")
86	n/a	self.assertIs(type(e), FileExistsError)
87	n/a	# Exhaustive testing
88	n/a	for errcode, exc in self._map.items():
89	n/a	e = OSError(errcode, "Some message")
90	n/a	self.assertIs(type(e), exc)
91	n/a	othercodes = set(errno.errorcode) - set(self._map)
92	n/a	for errcode in othercodes:
93	n/a	e = OSError(errcode, "Some message")
94	n/a	self.assertIs(type(e), OSError)
95	n/a
96	n/a	def test_try_except(self):
97	n/a	filename = "some_hopefully_non_existing_file"
98	n/a
99	n/a	# This checks that try .. except checks the concrete exception
100	n/a	# (FileNotFoundError) and not the base type specified when
101	n/a	# PyErr_SetFromErrnoWithFilenameObject was called.
102	n/a	# (it is therefore deliberate that it doesn't use assertRaises)
103	n/a	try:
104	n/a	open(filename)
105	n/a	except FileNotFoundError:
106	n/a	pass
107	n/a	else:
108	n/a	self.fail("should have raised a FileNotFoundError")
109	n/a
110	n/a	# Another test for PyErr_SetExcFromWindowsErrWithFilenameObject()
111	n/a	self.assertFalse(os.path.exists(filename))
112	n/a	try:
113	n/a	os.unlink(filename)
114	n/a	except FileNotFoundError:
115	n/a	pass
116	n/a	else:
117	n/a	self.fail("should have raised a FileNotFoundError")
118	n/a
119	n/a
120	n/a	class AttributesTest(unittest.TestCase):
121	n/a
122	n/a	def test_windows_error(self):
123	n/a	if os.name == "nt":
124	n/a	self.assertIn('winerror', dir(OSError))
125	n/a	else:
126	n/a	self.assertNotIn('winerror', dir(OSError))
127	n/a
128	n/a	def test_posix_error(self):
129	n/a	e = OSError(EEXIST, "File already exists", "foo.txt")
130	n/a	self.assertEqual(e.errno, EEXIST)
131	n/a	self.assertEqual(e.args[0], EEXIST)
132	n/a	self.assertEqual(e.strerror, "File already exists")
133	n/a	self.assertEqual(e.filename, "foo.txt")
134	n/a	if os.name == "nt":
135	n/a	self.assertEqual(e.winerror, None)
136	n/a
137	n/a	@unittest.skipUnless(os.name == "nt", "Windows-specific test")
138	n/a	def test_errno_translation(self):
139	n/a	# ERROR_ALREADY_EXISTS (183) -> EEXIST
140	n/a	e = OSError(0, "File already exists", "foo.txt", 183)
141	n/a	self.assertEqual(e.winerror, 183)
142	n/a	self.assertEqual(e.errno, EEXIST)
143	n/a	self.assertEqual(e.args[0], EEXIST)
144	n/a	self.assertEqual(e.strerror, "File already exists")
145	n/a	self.assertEqual(e.filename, "foo.txt")
146	n/a
147	n/a	def test_blockingioerror(self):
148	n/a	args = ("a", "b", "c", "d", "e")
149	n/a	for n in range(6):
150	n/a	e = BlockingIOError(*args[:n])
151	n/a	with self.assertRaises(AttributeError):
152	n/a	e.characters_written
153	n/a	e = BlockingIOError("a", "b", 3)
154	n/a	self.assertEqual(e.characters_written, 3)
155	n/a	e.characters_written = 5
156	n/a	self.assertEqual(e.characters_written, 5)
157	n/a
158	n/a
159	n/a	class ExplicitSubclassingTest(unittest.TestCase):
160	n/a
161	n/a	def test_errno_mapping(self):
162	n/a	# When constructing an OSError subclass, errno mapping isn't done
163	n/a	e = SubOSError(EEXIST, "Bad file descriptor")
164	n/a	self.assertIs(type(e), SubOSError)
165	n/a
166	n/a	def test_init_overridden(self):
167	n/a	e = SubOSErrorWithInit("some message", "baz")
168	n/a	self.assertEqual(e.bar, "baz")
169	n/a	self.assertEqual(e.args, ("some message",))
170	n/a
171	n/a	def test_init_kwdargs(self):
172	n/a	e = SubOSErrorWithInit("some message", bar="baz")
173	n/a	self.assertEqual(e.bar, "baz")
174	n/a	self.assertEqual(e.args, ("some message",))
175	n/a
176	n/a	def test_new_overridden(self):
177	n/a	e = SubOSErrorWithNew("some message", "baz")
178	n/a	self.assertEqual(e.baz, "baz")
179	n/a	self.assertEqual(e.args, ("some message",))
180	n/a
181	n/a	def test_new_kwdargs(self):
182	n/a	e = SubOSErrorWithNew("some message", baz="baz")
183	n/a	self.assertEqual(e.baz, "baz")
184	n/a	self.assertEqual(e.args, ("some message",))
185	n/a
186	n/a	def test_init_new_overridden(self):
187	n/a	e = SubOSErrorCombinedInitFirst("some message", "baz")
188	n/a	self.assertEqual(e.bar, "baz")
189	n/a	self.assertEqual(e.baz, "baz")
190	n/a	self.assertEqual(e.args, ("some message",))
191	n/a	e = SubOSErrorCombinedNewFirst("some message", "baz")
192	n/a	self.assertEqual(e.bar, "baz")
193	n/a	self.assertEqual(e.baz, "baz")
194	n/a	self.assertEqual(e.args, ("some message",))
195	n/a
196	n/a	def test_init_standalone(self):
197	n/a	# __init__ doesn't propagate to OSError.__init__ (see issue #15229)
198	n/a	e = SubOSErrorWithStandaloneInit()
199	n/a	self.assertEqual(e.args, ())
200	n/a	self.assertEqual(str(e), '')
201	n/a
202	n/a
203	n/a	if __name__ == "__main__":
204	n/a	unittest.main()