Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 1 | import builtins |
| 2 | import os |
| 3 | import select |
| 4 | import socket |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 5 | import unittest |
| 6 | import errno |
| 7 | from errno import EEXIST |
| 8 | |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 9 | |
| 10 | class SubOSError(OSError): |
| 11 | pass |
| 12 | |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 13 | class SubOSErrorWithInit(OSError): |
| 14 | def __init__(self, message, bar): |
| 15 | self.bar = bar |
| 16 | super().__init__(message) |
| 17 | |
| 18 | class SubOSErrorWithNew(OSError): |
| 19 | def __new__(cls, message, baz): |
| 20 | self = super().__new__(cls, message) |
| 21 | self.baz = baz |
| 22 | return self |
| 23 | |
| 24 | class SubOSErrorCombinedInitFirst(SubOSErrorWithInit, SubOSErrorWithNew): |
| 25 | pass |
| 26 | |
| 27 | class SubOSErrorCombinedNewFirst(SubOSErrorWithNew, SubOSErrorWithInit): |
| 28 | pass |
| 29 | |
Antoine Pitrou | f87289b | 2012-06-30 23:37:47 +0200 | [diff] [blame] | 30 | class SubOSErrorWithStandaloneInit(OSError): |
| 31 | def __init__(self): |
| 32 | pass |
| 33 | |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 34 | |
| 35 | class HierarchyTest(unittest.TestCase): |
| 36 | |
| 37 | def test_builtin_errors(self): |
| 38 | self.assertEqual(OSError.__name__, 'OSError') |
| 39 | self.assertIs(IOError, OSError) |
| 40 | self.assertIs(EnvironmentError, OSError) |
| 41 | |
| 42 | def test_socket_errors(self): |
| 43 | self.assertIs(socket.error, IOError) |
| 44 | self.assertIs(socket.gaierror.__base__, OSError) |
| 45 | self.assertIs(socket.herror.__base__, OSError) |
| 46 | self.assertIs(socket.timeout.__base__, OSError) |
| 47 | |
| 48 | def test_select_error(self): |
| 49 | self.assertIs(select.error, OSError) |
| 50 | |
| 51 | # mmap.error is tested in test_mmap |
| 52 | |
| 53 | _pep_map = """ |
| 54 | +-- BlockingIOError EAGAIN, EALREADY, EWOULDBLOCK, EINPROGRESS |
| 55 | +-- ChildProcessError ECHILD |
| 56 | +-- ConnectionError |
| 57 | +-- BrokenPipeError EPIPE, ESHUTDOWN |
| 58 | +-- ConnectionAbortedError ECONNABORTED |
| 59 | +-- ConnectionRefusedError ECONNREFUSED |
| 60 | +-- ConnectionResetError ECONNRESET |
| 61 | +-- FileExistsError EEXIST |
| 62 | +-- FileNotFoundError ENOENT |
| 63 | +-- InterruptedError EINTR |
| 64 | +-- IsADirectoryError EISDIR |
| 65 | +-- NotADirectoryError ENOTDIR |
| 66 | +-- PermissionError EACCES, EPERM |
| 67 | +-- ProcessLookupError ESRCH |
| 68 | +-- TimeoutError ETIMEDOUT |
| 69 | """ |
| 70 | def _make_map(s): |
| 71 | _map = {} |
| 72 | for line in s.splitlines(): |
| 73 | line = line.strip('+- ') |
| 74 | if not line: |
| 75 | continue |
| 76 | excname, _, errnames = line.partition(' ') |
| 77 | for errname in filter(None, errnames.strip().split(', ')): |
| 78 | _map[getattr(errno, errname)] = getattr(builtins, excname) |
| 79 | return _map |
| 80 | _map = _make_map(_pep_map) |
| 81 | |
| 82 | def test_errno_mapping(self): |
| 83 | # The OSError constructor maps errnos to subclasses |
| 84 | # A sample test for the basic functionality |
| 85 | e = OSError(EEXIST, "Bad file descriptor") |
| 86 | self.assertIs(type(e), FileExistsError) |
| 87 | # Exhaustive testing |
| 88 | for errcode, exc in self._map.items(): |
| 89 | e = OSError(errcode, "Some message") |
| 90 | self.assertIs(type(e), exc) |
| 91 | othercodes = set(errno.errorcode) - set(self._map) |
| 92 | for errcode in othercodes: |
| 93 | e = OSError(errcode, "Some message") |
| 94 | self.assertIs(type(e), OSError) |
| 95 | |
Antoine Pitrou | 5d6fbe8 | 2011-10-12 19:39:57 +0200 | [diff] [blame] | 96 | def test_try_except(self): |
Victor Stinner | 9ea8e4c | 2011-10-17 20:18:58 +0200 | [diff] [blame] | 97 | filename = "some_hopefully_non_existing_file" |
| 98 | |
Antoine Pitrou | 5d6fbe8 | 2011-10-12 19:39:57 +0200 | [diff] [blame] | 99 | # This checks that try .. except checks the concrete exception |
| 100 | # (FileNotFoundError) and not the base type specified when |
| 101 | # PyErr_SetFromErrnoWithFilenameObject was called. |
| 102 | # (it is therefore deliberate that it doesn't use assertRaises) |
| 103 | try: |
Victor Stinner | 9ea8e4c | 2011-10-17 20:18:58 +0200 | [diff] [blame] | 104 | open(filename) |
| 105 | except FileNotFoundError: |
| 106 | pass |
| 107 | else: |
| 108 | self.fail("should have raised a FileNotFoundError") |
| 109 | |
| 110 | # Another test for PyErr_SetExcFromWindowsErrWithFilenameObject() |
| 111 | self.assertFalse(os.path.exists(filename)) |
| 112 | try: |
| 113 | os.unlink(filename) |
Antoine Pitrou | 5d6fbe8 | 2011-10-12 19:39:57 +0200 | [diff] [blame] | 114 | except FileNotFoundError: |
| 115 | pass |
| 116 | else: |
| 117 | self.fail("should have raised a FileNotFoundError") |
| 118 | |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 119 | |
| 120 | class AttributesTest(unittest.TestCase): |
| 121 | |
| 122 | def test_windows_error(self): |
| 123 | if os.name == "nt": |
| 124 | self.assertIn('winerror', dir(OSError)) |
| 125 | else: |
| 126 | self.assertNotIn('winerror', dir(OSError)) |
| 127 | |
| 128 | def test_posix_error(self): |
| 129 | e = OSError(EEXIST, "File already exists", "foo.txt") |
| 130 | self.assertEqual(e.errno, EEXIST) |
| 131 | self.assertEqual(e.args[0], EEXIST) |
| 132 | self.assertEqual(e.strerror, "File already exists") |
| 133 | self.assertEqual(e.filename, "foo.txt") |
| 134 | if os.name == "nt": |
| 135 | self.assertEqual(e.winerror, None) |
| 136 | |
| 137 | @unittest.skipUnless(os.name == "nt", "Windows-specific test") |
| 138 | def test_errno_translation(self): |
| 139 | # ERROR_ALREADY_EXISTS (183) -> EEXIST |
| 140 | e = OSError(0, "File already exists", "foo.txt", 183) |
| 141 | self.assertEqual(e.winerror, 183) |
| 142 | self.assertEqual(e.errno, EEXIST) |
| 143 | self.assertEqual(e.args[0], EEXIST) |
| 144 | self.assertEqual(e.strerror, "File already exists") |
| 145 | self.assertEqual(e.filename, "foo.txt") |
| 146 | |
| 147 | def test_blockingioerror(self): |
| 148 | args = ("a", "b", "c", "d", "e") |
| 149 | for n in range(6): |
| 150 | e = BlockingIOError(*args[:n]) |
| 151 | with self.assertRaises(AttributeError): |
| 152 | e.characters_written |
| 153 | e = BlockingIOError("a", "b", 3) |
| 154 | self.assertEqual(e.characters_written, 3) |
| 155 | e.characters_written = 5 |
| 156 | self.assertEqual(e.characters_written, 5) |
| 157 | |
Antoine Pitrou | 6b4883d | 2011-10-12 02:54:14 +0200 | [diff] [blame] | 158 | |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 159 | class ExplicitSubclassingTest(unittest.TestCase): |
| 160 | |
| 161 | def test_errno_mapping(self): |
| 162 | # When constructing an OSError subclass, errno mapping isn't done |
| 163 | e = SubOSError(EEXIST, "Bad file descriptor") |
| 164 | self.assertIs(type(e), SubOSError) |
| 165 | |
Martin Panter | e26da7c | 2016-06-02 10:07:09 +0000 | [diff] [blame] | 166 | def test_init_overridden(self): |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 167 | e = SubOSErrorWithInit("some message", "baz") |
| 168 | self.assertEqual(e.bar, "baz") |
| 169 | self.assertEqual(e.args, ("some message",)) |
| 170 | |
| 171 | def test_init_kwdargs(self): |
| 172 | e = SubOSErrorWithInit("some message", bar="baz") |
| 173 | self.assertEqual(e.bar, "baz") |
| 174 | self.assertEqual(e.args, ("some message",)) |
| 175 | |
Martin Panter | e26da7c | 2016-06-02 10:07:09 +0000 | [diff] [blame] | 176 | def test_new_overridden(self): |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 177 | e = SubOSErrorWithNew("some message", "baz") |
| 178 | self.assertEqual(e.baz, "baz") |
| 179 | self.assertEqual(e.args, ("some message",)) |
| 180 | |
| 181 | def test_new_kwdargs(self): |
| 182 | e = SubOSErrorWithNew("some message", baz="baz") |
| 183 | self.assertEqual(e.baz, "baz") |
| 184 | self.assertEqual(e.args, ("some message",)) |
| 185 | |
Martin Panter | e26da7c | 2016-06-02 10:07:09 +0000 | [diff] [blame] | 186 | def test_init_new_overridden(self): |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 187 | e = SubOSErrorCombinedInitFirst("some message", "baz") |
| 188 | self.assertEqual(e.bar, "baz") |
| 189 | self.assertEqual(e.baz, "baz") |
| 190 | self.assertEqual(e.args, ("some message",)) |
| 191 | e = SubOSErrorCombinedNewFirst("some message", "baz") |
| 192 | self.assertEqual(e.bar, "baz") |
| 193 | self.assertEqual(e.baz, "baz") |
| 194 | self.assertEqual(e.args, ("some message",)) |
| 195 | |
Antoine Pitrou | f87289b | 2012-06-30 23:37:47 +0200 | [diff] [blame] | 196 | def test_init_standalone(self): |
| 197 | # __init__ doesn't propagate to OSError.__init__ (see issue #15229) |
| 198 | e = SubOSErrorWithStandaloneInit() |
| 199 | self.assertEqual(e.args, ()) |
| 200 | self.assertEqual(str(e), '') |
| 201 | |
Antoine Pitrou | e0e2735 | 2011-12-15 14:31:28 +0100 | [diff] [blame] | 202 | |
Zachary Ware | 38c707e | 2015-04-13 15:00:43 -0500 | [diff] [blame] | 203 | if __name__ == "__main__": |
| 204 | unittest.main() |