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Revision 7076764992cd29e0e1f8b0ac2b92403e1a698aa6 authored by Miss Islington (bot) on 16 September 2019, 22:11:10 UTC, committed by GitHub on 16 September 2019, 22:11:10 UTC
This PR replaces the old note mentioning that `typing` is a provisional module with a new one mentioning types are not enforced at runtime. I am not sure if there was any official announcement about making `typing` non-provisional, but _de-facto_ no new features were added during Python 3.7, and no backwards incompatible changes were made except for few small things that were considered bugs. (cherry picked from commit 81528ba2e81c39f4d6bca5b785e818c7d08b8501) Co-authored-by: Ivan Levkivskyi <levkivskyi@gmail.com>
1 parent 1ecc75a
Tip revision: 7076764992cd29e0e1f8b0ac2b92403e1a698aa6 authored by Miss Islington (bot) on 16 September 2019, 22:11:10 UTC
bpo-28556: Update the opening note in typing docs (GH-16204)
bpo-28556: Update the opening note in typing docs (GH-16204)
Tip revision: 7076764
test_exception_hierarchy.py
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
with self.assertRaises(AttributeError):
del e.characters_written
e = BlockingIOError("a", "b", 3)
self.assertEqual(e.characters_written, 3)
e.characters_written = 5
self.assertEqual(e.characters_written, 5)
del e.characters_written
with self.assertRaises(AttributeError):
e.characters_written
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()
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