Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1 | import builtins |
| 2 | import os |
| 3 | import select |
| 4 | import socket |
| 5 | import sys |
| 6 | import unittest |
| 7 | import errno |
| 8 | from errno import EEXIST |
| 9 | |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 10 | |
| 11 | class SubOSError(OSError): |
| 12 | pass |
| 13 | |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 14 | class SubOSErrorWithInit(OSError): |
| 15 | def __init__(self, message, bar): |
| 16 | self.bar = bar |
| 17 | super().__init__(message) |
| 18 | |
| 19 | class SubOSErrorWithNew(OSError): |
| 20 | def __new__(cls, message, baz): |
| 21 | self = super().__new__(cls, message) |
| 22 | self.baz = baz |
| 23 | return self |
| 24 | |
| 25 | class SubOSErrorCombinedInitFirst(SubOSErrorWithInit, SubOSErrorWithNew): |
| 26 | pass |
| 27 | |
| 28 | class SubOSErrorCombinedNewFirst(SubOSErrorWithNew, SubOSErrorWithInit): |
| 29 | pass |
| 30 | |
Antoine Pitrou | f87289b | 2012-06-30 23:37:47 +0200 | [diff] [blame] | 31 | class SubOSErrorWithStandaloneInit(OSError): |
| 32 | def __init__(self): |
| 33 | pass |
| 34 | |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 35 | |
| 36 | class HierarchyTest(unittest.TestCase): |
| 37 | |
| 38 | def test_builtin_errors(self): |
| 39 | self.assertEqual(OSError.__name__, 'OSError') |
| 40 | self.assertIs(IOError, OSError) |
| 41 | self.assertIs(EnvironmentError, OSError) |
| 42 | |
| 43 | def test_socket_errors(self): |
| 44 | self.assertIs(socket.error, IOError) |
| 45 | self.assertIs(socket.gaierror.__base__, OSError) |
| 46 | self.assertIs(socket.herror.__base__, OSError) |
| 47 | self.assertIs(socket.timeout.__base__, OSError) |
| 48 | |
| 49 | def test_select_error(self): |
| 50 | self.assertIs(select.error, OSError) |
| 51 | |
| 52 | # mmap.error is tested in test_mmap |
| 53 | |
| 54 | _pep_map = """ |
| 55 | +-- BlockingIOError EAGAIN, EALREADY, EWOULDBLOCK, EINPROGRESS |
| 56 | +-- ChildProcessError ECHILD |
| 57 | +-- ConnectionError |
| 58 | +-- BrokenPipeError EPIPE, ESHUTDOWN |
| 59 | +-- ConnectionAbortedError ECONNABORTED |
| 60 | +-- ConnectionRefusedError ECONNREFUSED |
| 61 | +-- ConnectionResetError ECONNRESET |
| 62 | +-- FileExistsError EEXIST |
| 63 | +-- FileNotFoundError ENOENT |
| 64 | +-- InterruptedError EINTR |
| 65 | +-- IsADirectoryError EISDIR |
| 66 | +-- NotADirectoryError ENOTDIR |
| 67 | +-- PermissionError EACCES, EPERM |
| 68 | +-- ProcessLookupError ESRCH |
| 69 | +-- TimeoutError ETIMEDOUT |
| 70 | """ |
| 71 | def _make_map(s): |
| 72 | _map = {} |
| 73 | for line in s.splitlines(): |
| 74 | line = line.strip('+- ') |
| 75 | if not line: |
| 76 | continue |
| 77 | excname, _, errnames = line.partition(' ') |
| 78 | for errname in filter(None, errnames.strip().split(', ')): |
| 79 | _map[getattr(errno, errname)] = getattr(builtins, excname) |
| 80 | return _map |
| 81 | _map = _make_map(_pep_map) |
| 82 | |
| 83 | def test_errno_mapping(self): |
| 84 | # The OSError constructor maps errnos to subclasses |
| 85 | # A sample test for the basic functionality |
| 86 | e = OSError(EEXIST, "Bad file descriptor") |
| 87 | self.assertIs(type(e), FileExistsError) |
| 88 | # Exhaustive testing |
| 89 | for errcode, exc in self._map.items(): |
| 90 | e = OSError(errcode, "Some message") |
| 91 | self.assertIs(type(e), exc) |
| 92 | othercodes = set(errno.errorcode) - set(self._map) |
| 93 | for errcode in othercodes: |
| 94 | e = OSError(errcode, "Some message") |
| 95 | self.assertIs(type(e), OSError) |
| 96 | |
Antoine Pitrou | 5d6fbe8 | 2011-10-12 19:39:57 +0200 | [diff] [blame] | 97 | def test_try_except(self): |
Victor Stinner | 9ea8e4c | 2011-10-17 20:18:58 +0200 | [diff] [blame] | 98 | filename = "some_hopefully_non_existing_file" |
| 99 | |
Antoine Pitrou | 5d6fbe8 | 2011-10-12 19:39:57 +0200 | [diff] [blame] | 100 | # This checks that try .. except checks the concrete exception |
| 101 | # (FileNotFoundError) and not the base type specified when |
| 102 | # PyErr_SetFromErrnoWithFilenameObject was called. |
| 103 | # (it is therefore deliberate that it doesn't use assertRaises) |
| 104 | try: |
Victor Stinner | 9ea8e4c | 2011-10-17 20:18:58 +0200 | [diff] [blame] | 105 | open(filename) |
| 106 | except FileNotFoundError: |
| 107 | pass |
| 108 | else: |
| 109 | self.fail("should have raised a FileNotFoundError") |
| 110 | |
| 111 | # Another test for PyErr_SetExcFromWindowsErrWithFilenameObject() |
| 112 | self.assertFalse(os.path.exists(filename)) |
| 113 | try: |
| 114 | os.unlink(filename) |
Antoine Pitrou | 5d6fbe8 | 2011-10-12 19:39:57 +0200 | [diff] [blame] | 115 | except FileNotFoundError: |
| 116 | pass |
| 117 | else: |
| 118 | self.fail("should have raised a FileNotFoundError") |
| 119 | |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 120 | |
| 121 | class AttributesTest(unittest.TestCase): |
| 122 | |
| 123 | def test_windows_error(self): |
| 124 | if os.name == "nt": |
| 125 | self.assertIn('winerror', dir(OSError)) |
| 126 | else: |
| 127 | self.assertNotIn('winerror', dir(OSError)) |
| 128 | |
| 129 | def test_posix_error(self): |
| 130 | e = OSError(EEXIST, "File already exists", "foo.txt") |
| 131 | self.assertEqual(e.errno, EEXIST) |
| 132 | self.assertEqual(e.args[0], EEXIST) |
| 133 | self.assertEqual(e.strerror, "File already exists") |
| 134 | self.assertEqual(e.filename, "foo.txt") |
| 135 | if os.name == "nt": |
| 136 | self.assertEqual(e.winerror, None) |
| 137 | |
| 138 | @unittest.skipUnless(os.name == "nt", "Windows-specific test") |
| 139 | def test_errno_translation(self): |
| 140 | # ERROR_ALREADY_EXISTS (183) -> EEXIST |
| 141 | e = OSError(0, "File already exists", "foo.txt", 183) |
| 142 | self.assertEqual(e.winerror, 183) |
| 143 | self.assertEqual(e.errno, EEXIST) |
| 144 | self.assertEqual(e.args[0], EEXIST) |
| 145 | self.assertEqual(e.strerror, "File already exists") |
| 146 | self.assertEqual(e.filename, "foo.txt") |
| 147 | |
| 148 | def test_blockingioerror(self): |
| 149 | args = ("a", "b", "c", "d", "e") |
| 150 | for n in range(6): |
| 151 | e = BlockingIOError(*args[:n]) |
| 152 | with self.assertRaises(AttributeError): |
| 153 | e.characters_written |
| 154 | e = BlockingIOError("a", "b", 3) |
| 155 | self.assertEqual(e.characters_written, 3) |
| 156 | e.characters_written = 5 |
| 157 | self.assertEqual(e.characters_written, 5) |
| 158 | |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 159 | |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 160 | class ExplicitSubclassingTest(unittest.TestCase): |
| 161 | |
| 162 | def test_errno_mapping(self): |
| 163 | # When constructing an OSError subclass, errno mapping isn't done |
| 164 | e = SubOSError(EEXIST, "Bad file descriptor") |
| 165 | self.assertIs(type(e), SubOSError) |
| 166 | |
| 167 | def test_init_overriden(self): |
| 168 | e = SubOSErrorWithInit("some message", "baz") |
| 169 | self.assertEqual(e.bar, "baz") |
| 170 | self.assertEqual(e.args, ("some message",)) |
| 171 | |
| 172 | def test_init_kwdargs(self): |
| 173 | e = SubOSErrorWithInit("some message", bar="baz") |
| 174 | self.assertEqual(e.bar, "baz") |
| 175 | self.assertEqual(e.args, ("some message",)) |
| 176 | |
| 177 | def test_new_overriden(self): |
| 178 | e = SubOSErrorWithNew("some message", "baz") |
| 179 | self.assertEqual(e.baz, "baz") |
| 180 | self.assertEqual(e.args, ("some message",)) |
| 181 | |
| 182 | def test_new_kwdargs(self): |
| 183 | e = SubOSErrorWithNew("some message", baz="baz") |
| 184 | self.assertEqual(e.baz, "baz") |
| 185 | self.assertEqual(e.args, ("some message",)) |
| 186 | |
| 187 | def test_init_new_overriden(self): |
| 188 | e = SubOSErrorCombinedInitFirst("some message", "baz") |
| 189 | self.assertEqual(e.bar, "baz") |
| 190 | self.assertEqual(e.baz, "baz") |
| 191 | self.assertEqual(e.args, ("some message",)) |
| 192 | e = SubOSErrorCombinedNewFirst("some message", "baz") |
| 193 | self.assertEqual(e.bar, "baz") |
| 194 | self.assertEqual(e.baz, "baz") |
| 195 | self.assertEqual(e.args, ("some message",)) |
| 196 | |
Antoine Pitrou | f87289b | 2012-06-30 23:37:47 +0200 | [diff] [blame] | 197 | def test_init_standalone(self): |
| 198 | # __init__ doesn't propagate to OSError.__init__ (see issue #15229) |
| 199 | e = SubOSErrorWithStandaloneInit() |
| 200 | self.assertEqual(e.args, ()) |
| 201 | self.assertEqual(str(e), '') |
| 202 | |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 203 | |
Zachary Ware | 38c707e | 2015-04-13 15:00:43 -0500 | [diff] [blame] | 204 | if __name__ == "__main__": |
| 205 | unittest.main() |