mirror of
https://github.com/python/cpython.git
synced 2024-12-14 04:17:19 +08:00
3137 lines
113 KiB
Python
3137 lines
113 KiB
Python
"""Unit tests for the io module."""
|
|
|
|
# Tests of io are scattered over the test suite:
|
|
# * test_bufio - tests file buffering
|
|
# * test_memoryio - tests BytesIO and StringIO
|
|
# * test_fileio - tests FileIO
|
|
# * test_file - tests the file interface
|
|
# * test_io - tests everything else in the io module
|
|
# * test_univnewlines - tests universal newline support
|
|
# * test_largefile - tests operations on a file greater than 2**32 bytes
|
|
# (only enabled with -ulargefile)
|
|
|
|
################################################################################
|
|
# ATTENTION TEST WRITERS!!!
|
|
################################################################################
|
|
# When writing tests for io, it's important to test both the C and Python
|
|
# implementations. This is usually done by writing a base test that refers to
|
|
# the type it is testing as a attribute. Then it provides custom subclasses to
|
|
# test both implementations. This file has lots of examples.
|
|
################################################################################
|
|
|
|
import abc
|
|
import array
|
|
import errno
|
|
import locale
|
|
import os
|
|
import pickle
|
|
import random
|
|
import signal
|
|
import sys
|
|
import time
|
|
import unittest
|
|
import warnings
|
|
import weakref
|
|
from collections import deque
|
|
from itertools import cycle, count
|
|
from test import support
|
|
|
|
import codecs
|
|
import io # C implementation of io
|
|
import _pyio as pyio # Python implementation of io
|
|
try:
|
|
import threading
|
|
except ImportError:
|
|
threading = None
|
|
try:
|
|
import fcntl
|
|
except ImportError:
|
|
fcntl = None
|
|
|
|
def _default_chunk_size():
|
|
"""Get the default TextIOWrapper chunk size"""
|
|
with open(__file__, "r", encoding="latin-1") as f:
|
|
return f._CHUNK_SIZE
|
|
|
|
|
|
class MockRawIOWithoutRead:
|
|
"""A RawIO implementation without read(), so as to exercise the default
|
|
RawIO.read() which calls readinto()."""
|
|
|
|
def __init__(self, read_stack=()):
|
|
self._read_stack = list(read_stack)
|
|
self._write_stack = []
|
|
self._reads = 0
|
|
self._extraneous_reads = 0
|
|
|
|
def write(self, b):
|
|
self._write_stack.append(bytes(b))
|
|
return len(b)
|
|
|
|
def writable(self):
|
|
return True
|
|
|
|
def fileno(self):
|
|
return 42
|
|
|
|
def readable(self):
|
|
return True
|
|
|
|
def seekable(self):
|
|
return True
|
|
|
|
def seek(self, pos, whence):
|
|
return 0 # wrong but we gotta return something
|
|
|
|
def tell(self):
|
|
return 0 # same comment as above
|
|
|
|
def readinto(self, buf):
|
|
self._reads += 1
|
|
max_len = len(buf)
|
|
try:
|
|
data = self._read_stack[0]
|
|
except IndexError:
|
|
self._extraneous_reads += 1
|
|
return 0
|
|
if data is None:
|
|
del self._read_stack[0]
|
|
return None
|
|
n = len(data)
|
|
if len(data) <= max_len:
|
|
del self._read_stack[0]
|
|
buf[:n] = data
|
|
return n
|
|
else:
|
|
buf[:] = data[:max_len]
|
|
self._read_stack[0] = data[max_len:]
|
|
return max_len
|
|
|
|
def truncate(self, pos=None):
|
|
return pos
|
|
|
|
class CMockRawIOWithoutRead(MockRawIOWithoutRead, io.RawIOBase):
|
|
pass
|
|
|
|
class PyMockRawIOWithoutRead(MockRawIOWithoutRead, pyio.RawIOBase):
|
|
pass
|
|
|
|
|
|
class MockRawIO(MockRawIOWithoutRead):
|
|
|
|
def read(self, n=None):
|
|
self._reads += 1
|
|
try:
|
|
return self._read_stack.pop(0)
|
|
except:
|
|
self._extraneous_reads += 1
|
|
return b""
|
|
|
|
class CMockRawIO(MockRawIO, io.RawIOBase):
|
|
pass
|
|
|
|
class PyMockRawIO(MockRawIO, pyio.RawIOBase):
|
|
pass
|
|
|
|
|
|
class MisbehavedRawIO(MockRawIO):
|
|
def write(self, b):
|
|
return super().write(b) * 2
|
|
|
|
def read(self, n=None):
|
|
return super().read(n) * 2
|
|
|
|
def seek(self, pos, whence):
|
|
return -123
|
|
|
|
def tell(self):
|
|
return -456
|
|
|
|
def readinto(self, buf):
|
|
super().readinto(buf)
|
|
return len(buf) * 5
|
|
|
|
class CMisbehavedRawIO(MisbehavedRawIO, io.RawIOBase):
|
|
pass
|
|
|
|
class PyMisbehavedRawIO(MisbehavedRawIO, pyio.RawIOBase):
|
|
pass
|
|
|
|
|
|
class CloseFailureIO(MockRawIO):
|
|
closed = 0
|
|
|
|
def close(self):
|
|
if not self.closed:
|
|
self.closed = 1
|
|
raise IOError
|
|
|
|
class CCloseFailureIO(CloseFailureIO, io.RawIOBase):
|
|
pass
|
|
|
|
class PyCloseFailureIO(CloseFailureIO, pyio.RawIOBase):
|
|
pass
|
|
|
|
|
|
class MockFileIO:
|
|
|
|
def __init__(self, data):
|
|
self.read_history = []
|
|
super().__init__(data)
|
|
|
|
def read(self, n=None):
|
|
res = super().read(n)
|
|
self.read_history.append(None if res is None else len(res))
|
|
return res
|
|
|
|
def readinto(self, b):
|
|
res = super().readinto(b)
|
|
self.read_history.append(res)
|
|
return res
|
|
|
|
class CMockFileIO(MockFileIO, io.BytesIO):
|
|
pass
|
|
|
|
class PyMockFileIO(MockFileIO, pyio.BytesIO):
|
|
pass
|
|
|
|
|
|
class MockUnseekableIO:
|
|
def seekable(self):
|
|
return False
|
|
|
|
def seek(self, *args):
|
|
raise self.UnsupportedOperation("not seekable")
|
|
|
|
def tell(self, *args):
|
|
raise self.UnsupportedOperation("not seekable")
|
|
|
|
class CMockUnseekableIO(MockUnseekableIO, io.BytesIO):
|
|
UnsupportedOperation = io.UnsupportedOperation
|
|
|
|
class PyMockUnseekableIO(MockUnseekableIO, pyio.BytesIO):
|
|
UnsupportedOperation = pyio.UnsupportedOperation
|
|
|
|
|
|
class MockNonBlockWriterIO:
|
|
|
|
def __init__(self):
|
|
self._write_stack = []
|
|
self._blocker_char = None
|
|
|
|
def pop_written(self):
|
|
s = b"".join(self._write_stack)
|
|
self._write_stack[:] = []
|
|
return s
|
|
|
|
def block_on(self, char):
|
|
"""Block when a given char is encountered."""
|
|
self._blocker_char = char
|
|
|
|
def readable(self):
|
|
return True
|
|
|
|
def seekable(self):
|
|
return True
|
|
|
|
def writable(self):
|
|
return True
|
|
|
|
def write(self, b):
|
|
b = bytes(b)
|
|
n = -1
|
|
if self._blocker_char:
|
|
try:
|
|
n = b.index(self._blocker_char)
|
|
except ValueError:
|
|
pass
|
|
else:
|
|
if n > 0:
|
|
# write data up to the first blocker
|
|
self._write_stack.append(b[:n])
|
|
return n
|
|
else:
|
|
# cancel blocker and indicate would block
|
|
self._blocker_char = None
|
|
return None
|
|
self._write_stack.append(b)
|
|
return len(b)
|
|
|
|
class CMockNonBlockWriterIO(MockNonBlockWriterIO, io.RawIOBase):
|
|
BlockingIOError = io.BlockingIOError
|
|
|
|
class PyMockNonBlockWriterIO(MockNonBlockWriterIO, pyio.RawIOBase):
|
|
BlockingIOError = pyio.BlockingIOError
|
|
|
|
|
|
class IOTest(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
support.unlink(support.TESTFN)
|
|
|
|
def tearDown(self):
|
|
support.unlink(support.TESTFN)
|
|
|
|
def write_ops(self, f):
|
|
self.assertEqual(f.write(b"blah."), 5)
|
|
f.truncate(0)
|
|
self.assertEqual(f.tell(), 5)
|
|
f.seek(0)
|
|
|
|
self.assertEqual(f.write(b"blah."), 5)
|
|
self.assertEqual(f.seek(0), 0)
|
|
self.assertEqual(f.write(b"Hello."), 6)
|
|
self.assertEqual(f.tell(), 6)
|
|
self.assertEqual(f.seek(-1, 1), 5)
|
|
self.assertEqual(f.tell(), 5)
|
|
self.assertEqual(f.write(bytearray(b" world\n\n\n")), 9)
|
|
self.assertEqual(f.seek(0), 0)
|
|
self.assertEqual(f.write(b"h"), 1)
|
|
self.assertEqual(f.seek(-1, 2), 13)
|
|
self.assertEqual(f.tell(), 13)
|
|
|
|
self.assertEqual(f.truncate(12), 12)
|
|
self.assertEqual(f.tell(), 13)
|
|
self.assertRaises(TypeError, f.seek, 0.0)
|
|
|
|
def read_ops(self, f, buffered=False):
|
|
data = f.read(5)
|
|
self.assertEqual(data, b"hello")
|
|
data = bytearray(data)
|
|
self.assertEqual(f.readinto(data), 5)
|
|
self.assertEqual(data, b" worl")
|
|
self.assertEqual(f.readinto(data), 2)
|
|
self.assertEqual(len(data), 5)
|
|
self.assertEqual(data[:2], b"d\n")
|
|
self.assertEqual(f.seek(0), 0)
|
|
self.assertEqual(f.read(20), b"hello world\n")
|
|
self.assertEqual(f.read(1), b"")
|
|
self.assertEqual(f.readinto(bytearray(b"x")), 0)
|
|
self.assertEqual(f.seek(-6, 2), 6)
|
|
self.assertEqual(f.read(5), b"world")
|
|
self.assertEqual(f.read(0), b"")
|
|
self.assertEqual(f.readinto(bytearray()), 0)
|
|
self.assertEqual(f.seek(-6, 1), 5)
|
|
self.assertEqual(f.read(5), b" worl")
|
|
self.assertEqual(f.tell(), 10)
|
|
self.assertRaises(TypeError, f.seek, 0.0)
|
|
if buffered:
|
|
f.seek(0)
|
|
self.assertEqual(f.read(), b"hello world\n")
|
|
f.seek(6)
|
|
self.assertEqual(f.read(), b"world\n")
|
|
self.assertEqual(f.read(), b"")
|
|
|
|
LARGE = 2**31
|
|
|
|
def large_file_ops(self, f):
|
|
assert f.readable()
|
|
assert f.writable()
|
|
self.assertEqual(f.seek(self.LARGE), self.LARGE)
|
|
self.assertEqual(f.tell(), self.LARGE)
|
|
self.assertEqual(f.write(b"xxx"), 3)
|
|
self.assertEqual(f.tell(), self.LARGE + 3)
|
|
self.assertEqual(f.seek(-1, 1), self.LARGE + 2)
|
|
self.assertEqual(f.truncate(), self.LARGE + 2)
|
|
self.assertEqual(f.tell(), self.LARGE + 2)
|
|
self.assertEqual(f.seek(0, 2), self.LARGE + 2)
|
|
self.assertEqual(f.truncate(self.LARGE + 1), self.LARGE + 1)
|
|
self.assertEqual(f.tell(), self.LARGE + 2)
|
|
self.assertEqual(f.seek(0, 2), self.LARGE + 1)
|
|
self.assertEqual(f.seek(-1, 2), self.LARGE)
|
|
self.assertEqual(f.read(2), b"x")
|
|
|
|
def test_invalid_operations(self):
|
|
# Try writing on a file opened in read mode and vice-versa.
|
|
exc = self.UnsupportedOperation
|
|
for mode in ("w", "wb"):
|
|
with self.open(support.TESTFN, mode) as fp:
|
|
self.assertRaises(exc, fp.read)
|
|
self.assertRaises(exc, fp.readline)
|
|
with self.open(support.TESTFN, "wb", buffering=0) as fp:
|
|
self.assertRaises(exc, fp.read)
|
|
self.assertRaises(exc, fp.readline)
|
|
with self.open(support.TESTFN, "rb", buffering=0) as fp:
|
|
self.assertRaises(exc, fp.write, b"blah")
|
|
self.assertRaises(exc, fp.writelines, [b"blah\n"])
|
|
with self.open(support.TESTFN, "rb") as fp:
|
|
self.assertRaises(exc, fp.write, b"blah")
|
|
self.assertRaises(exc, fp.writelines, [b"blah\n"])
|
|
with self.open(support.TESTFN, "r") as fp:
|
|
self.assertRaises(exc, fp.write, "blah")
|
|
self.assertRaises(exc, fp.writelines, ["blah\n"])
|
|
# Non-zero seeking from current or end pos
|
|
self.assertRaises(exc, fp.seek, 1, self.SEEK_CUR)
|
|
self.assertRaises(exc, fp.seek, -1, self.SEEK_END)
|
|
|
|
def test_open_handles_NUL_chars(self):
|
|
fn_with_NUL = 'foo\0bar'
|
|
self.assertRaises(TypeError, self.open, fn_with_NUL, 'w')
|
|
self.assertRaises(TypeError, self.open, bytes(fn_with_NUL, 'ascii'), 'w')
|
|
|
|
def test_raw_file_io(self):
|
|
with self.open(support.TESTFN, "wb", buffering=0) as f:
|
|
self.assertEqual(f.readable(), False)
|
|
self.assertEqual(f.writable(), True)
|
|
self.assertEqual(f.seekable(), True)
|
|
self.write_ops(f)
|
|
with self.open(support.TESTFN, "rb", buffering=0) as f:
|
|
self.assertEqual(f.readable(), True)
|
|
self.assertEqual(f.writable(), False)
|
|
self.assertEqual(f.seekable(), True)
|
|
self.read_ops(f)
|
|
|
|
def test_buffered_file_io(self):
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
self.assertEqual(f.readable(), False)
|
|
self.assertEqual(f.writable(), True)
|
|
self.assertEqual(f.seekable(), True)
|
|
self.write_ops(f)
|
|
with self.open(support.TESTFN, "rb") as f:
|
|
self.assertEqual(f.readable(), True)
|
|
self.assertEqual(f.writable(), False)
|
|
self.assertEqual(f.seekable(), True)
|
|
self.read_ops(f, True)
|
|
|
|
def test_readline(self):
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
f.write(b"abc\ndef\nxyzzy\nfoo\x00bar\nanother line")
|
|
with self.open(support.TESTFN, "rb") as f:
|
|
self.assertEqual(f.readline(), b"abc\n")
|
|
self.assertEqual(f.readline(10), b"def\n")
|
|
self.assertEqual(f.readline(2), b"xy")
|
|
self.assertEqual(f.readline(4), b"zzy\n")
|
|
self.assertEqual(f.readline(), b"foo\x00bar\n")
|
|
self.assertEqual(f.readline(None), b"another line")
|
|
self.assertRaises(TypeError, f.readline, 5.3)
|
|
with self.open(support.TESTFN, "r") as f:
|
|
self.assertRaises(TypeError, f.readline, 5.3)
|
|
|
|
def test_raw_bytes_io(self):
|
|
f = self.BytesIO()
|
|
self.write_ops(f)
|
|
data = f.getvalue()
|
|
self.assertEqual(data, b"hello world\n")
|
|
f = self.BytesIO(data)
|
|
self.read_ops(f, True)
|
|
|
|
def test_large_file_ops(self):
|
|
# On Windows and Mac OSX this test comsumes large resources; It takes
|
|
# a long time to build the >2GB file and takes >2GB of disk space
|
|
# therefore the resource must be enabled to run this test.
|
|
if sys.platform[:3] == 'win' or sys.platform == 'darwin':
|
|
if not support.is_resource_enabled("largefile"):
|
|
print("\nTesting large file ops skipped on %s." % sys.platform,
|
|
file=sys.stderr)
|
|
print("It requires %d bytes and a long time." % self.LARGE,
|
|
file=sys.stderr)
|
|
print("Use 'regrtest.py -u largefile test_io' to run it.",
|
|
file=sys.stderr)
|
|
return
|
|
with self.open(support.TESTFN, "w+b", 0) as f:
|
|
self.large_file_ops(f)
|
|
with self.open(support.TESTFN, "w+b") as f:
|
|
self.large_file_ops(f)
|
|
|
|
def test_with_open(self):
|
|
for bufsize in (0, 1, 100):
|
|
f = None
|
|
with self.open(support.TESTFN, "wb", bufsize) as f:
|
|
f.write(b"xxx")
|
|
self.assertEqual(f.closed, True)
|
|
f = None
|
|
try:
|
|
with self.open(support.TESTFN, "wb", bufsize) as f:
|
|
1/0
|
|
except ZeroDivisionError:
|
|
self.assertEqual(f.closed, True)
|
|
else:
|
|
self.fail("1/0 didn't raise an exception")
|
|
|
|
# issue 5008
|
|
def test_append_mode_tell(self):
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
f.write(b"xxx")
|
|
with self.open(support.TESTFN, "ab", buffering=0) as f:
|
|
self.assertEqual(f.tell(), 3)
|
|
with self.open(support.TESTFN, "ab") as f:
|
|
self.assertEqual(f.tell(), 3)
|
|
with self.open(support.TESTFN, "a") as f:
|
|
self.assertTrue(f.tell() > 0)
|
|
|
|
def test_destructor(self):
|
|
record = []
|
|
class MyFileIO(self.FileIO):
|
|
def __del__(self):
|
|
record.append(1)
|
|
try:
|
|
f = super().__del__
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
f()
|
|
def close(self):
|
|
record.append(2)
|
|
super().close()
|
|
def flush(self):
|
|
record.append(3)
|
|
super().flush()
|
|
with support.check_warnings(('', ResourceWarning)):
|
|
f = MyFileIO(support.TESTFN, "wb")
|
|
f.write(b"xxx")
|
|
del f
|
|
support.gc_collect()
|
|
self.assertEqual(record, [1, 2, 3])
|
|
with self.open(support.TESTFN, "rb") as f:
|
|
self.assertEqual(f.read(), b"xxx")
|
|
|
|
def _check_base_destructor(self, base):
|
|
record = []
|
|
class MyIO(base):
|
|
def __init__(self):
|
|
# This exercises the availability of attributes on object
|
|
# destruction.
|
|
# (in the C version, close() is called by the tp_dealloc
|
|
# function, not by __del__)
|
|
self.on_del = 1
|
|
self.on_close = 2
|
|
self.on_flush = 3
|
|
def __del__(self):
|
|
record.append(self.on_del)
|
|
try:
|
|
f = super().__del__
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
f()
|
|
def close(self):
|
|
record.append(self.on_close)
|
|
super().close()
|
|
def flush(self):
|
|
record.append(self.on_flush)
|
|
super().flush()
|
|
f = MyIO()
|
|
del f
|
|
support.gc_collect()
|
|
self.assertEqual(record, [1, 2, 3])
|
|
|
|
def test_IOBase_destructor(self):
|
|
self._check_base_destructor(self.IOBase)
|
|
|
|
def test_RawIOBase_destructor(self):
|
|
self._check_base_destructor(self.RawIOBase)
|
|
|
|
def test_BufferedIOBase_destructor(self):
|
|
self._check_base_destructor(self.BufferedIOBase)
|
|
|
|
def test_TextIOBase_destructor(self):
|
|
self._check_base_destructor(self.TextIOBase)
|
|
|
|
def test_close_flushes(self):
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
f.write(b"xxx")
|
|
with self.open(support.TESTFN, "rb") as f:
|
|
self.assertEqual(f.read(), b"xxx")
|
|
|
|
def test_array_writes(self):
|
|
a = array.array('i', range(10))
|
|
n = len(a.tobytes())
|
|
with self.open(support.TESTFN, "wb", 0) as f:
|
|
self.assertEqual(f.write(a), n)
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
self.assertEqual(f.write(a), n)
|
|
|
|
def test_closefd(self):
|
|
self.assertRaises(ValueError, self.open, support.TESTFN, 'w',
|
|
closefd=False)
|
|
|
|
def test_read_closed(self):
|
|
with self.open(support.TESTFN, "w") as f:
|
|
f.write("egg\n")
|
|
with self.open(support.TESTFN, "r") as f:
|
|
file = self.open(f.fileno(), "r", closefd=False)
|
|
self.assertEqual(file.read(), "egg\n")
|
|
file.seek(0)
|
|
file.close()
|
|
self.assertRaises(ValueError, file.read)
|
|
|
|
def test_no_closefd_with_filename(self):
|
|
# can't use closefd in combination with a file name
|
|
self.assertRaises(ValueError, self.open, support.TESTFN, "r", closefd=False)
|
|
|
|
def test_closefd_attr(self):
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
f.write(b"egg\n")
|
|
with self.open(support.TESTFN, "r") as f:
|
|
self.assertEqual(f.buffer.raw.closefd, True)
|
|
file = self.open(f.fileno(), "r", closefd=False)
|
|
self.assertEqual(file.buffer.raw.closefd, False)
|
|
|
|
def test_garbage_collection(self):
|
|
# FileIO objects are collected, and collecting them flushes
|
|
# all data to disk.
|
|
with support.check_warnings(('', ResourceWarning)):
|
|
f = self.FileIO(support.TESTFN, "wb")
|
|
f.write(b"abcxxx")
|
|
f.f = f
|
|
wr = weakref.ref(f)
|
|
del f
|
|
support.gc_collect()
|
|
self.assertTrue(wr() is None, wr)
|
|
with self.open(support.TESTFN, "rb") as f:
|
|
self.assertEqual(f.read(), b"abcxxx")
|
|
|
|
def test_unbounded_file(self):
|
|
# Issue #1174606: reading from an unbounded stream such as /dev/zero.
|
|
zero = "/dev/zero"
|
|
if not os.path.exists(zero):
|
|
self.skipTest("{0} does not exist".format(zero))
|
|
if sys.maxsize > 0x7FFFFFFF:
|
|
self.skipTest("test can only run in a 32-bit address space")
|
|
if support.real_max_memuse < support._2G:
|
|
self.skipTest("test requires at least 2GB of memory")
|
|
with self.open(zero, "rb", buffering=0) as f:
|
|
self.assertRaises(OverflowError, f.read)
|
|
with self.open(zero, "rb") as f:
|
|
self.assertRaises(OverflowError, f.read)
|
|
with self.open(zero, "r") as f:
|
|
self.assertRaises(OverflowError, f.read)
|
|
|
|
def test_flush_error_on_close(self):
|
|
f = self.open(support.TESTFN, "wb", buffering=0)
|
|
def bad_flush():
|
|
raise IOError()
|
|
f.flush = bad_flush
|
|
self.assertRaises(IOError, f.close) # exception not swallowed
|
|
|
|
def test_multi_close(self):
|
|
f = self.open(support.TESTFN, "wb", buffering=0)
|
|
f.close()
|
|
f.close()
|
|
f.close()
|
|
self.assertRaises(ValueError, f.flush)
|
|
|
|
def test_RawIOBase_read(self):
|
|
# Exercise the default RawIOBase.read() implementation (which calls
|
|
# readinto() internally).
|
|
rawio = self.MockRawIOWithoutRead((b"abc", b"d", None, b"efg", None))
|
|
self.assertEqual(rawio.read(2), b"ab")
|
|
self.assertEqual(rawio.read(2), b"c")
|
|
self.assertEqual(rawio.read(2), b"d")
|
|
self.assertEqual(rawio.read(2), None)
|
|
self.assertEqual(rawio.read(2), b"ef")
|
|
self.assertEqual(rawio.read(2), b"g")
|
|
self.assertEqual(rawio.read(2), None)
|
|
self.assertEqual(rawio.read(2), b"")
|
|
|
|
def test_types_have_dict(self):
|
|
test = (
|
|
self.IOBase(),
|
|
self.RawIOBase(),
|
|
self.TextIOBase(),
|
|
self.StringIO(),
|
|
self.BytesIO()
|
|
)
|
|
for obj in test:
|
|
self.assertTrue(hasattr(obj, "__dict__"))
|
|
|
|
def test_opener(self):
|
|
with self.open(support.TESTFN, "w") as f:
|
|
f.write("egg\n")
|
|
fd = os.open(support.TESTFN, os.O_RDONLY)
|
|
def opener(path, flags):
|
|
return fd
|
|
with self.open("non-existent", "r", opener=opener) as f:
|
|
self.assertEqual(f.read(), "egg\n")
|
|
|
|
def test_fileio_closefd(self):
|
|
# Issue #4841
|
|
with self.open(__file__, 'rb') as f1, \
|
|
self.open(__file__, 'rb') as f2:
|
|
fileio = self.FileIO(f1.fileno(), closefd=False)
|
|
# .__init__() must not close f1
|
|
fileio.__init__(f2.fileno(), closefd=False)
|
|
f1.readline()
|
|
# .close() must not close f2
|
|
fileio.close()
|
|
f2.readline()
|
|
|
|
|
|
class CIOTest(IOTest):
|
|
|
|
def test_IOBase_finalize(self):
|
|
# Issue #12149: segmentation fault on _PyIOBase_finalize when both a
|
|
# class which inherits IOBase and an object of this class are caught
|
|
# in a reference cycle and close() is already in the method cache.
|
|
class MyIO(self.IOBase):
|
|
def close(self):
|
|
pass
|
|
|
|
# create an instance to populate the method cache
|
|
MyIO()
|
|
obj = MyIO()
|
|
obj.obj = obj
|
|
wr = weakref.ref(obj)
|
|
del MyIO
|
|
del obj
|
|
support.gc_collect()
|
|
self.assertTrue(wr() is None, wr)
|
|
|
|
class PyIOTest(IOTest):
|
|
pass
|
|
|
|
|
|
class CommonBufferedTests:
|
|
# Tests common to BufferedReader, BufferedWriter and BufferedRandom
|
|
|
|
def test_detach(self):
|
|
raw = self.MockRawIO()
|
|
buf = self.tp(raw)
|
|
self.assertIs(buf.detach(), raw)
|
|
self.assertRaises(ValueError, buf.detach)
|
|
|
|
def test_fileno(self):
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio)
|
|
|
|
self.assertEqual(42, bufio.fileno())
|
|
|
|
def test_no_fileno(self):
|
|
# XXX will we always have fileno() function? If so, kill
|
|
# this test. Else, write it.
|
|
pass
|
|
|
|
def test_invalid_args(self):
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio)
|
|
# Invalid whence
|
|
self.assertRaises(ValueError, bufio.seek, 0, -1)
|
|
self.assertRaises(ValueError, bufio.seek, 0, 9)
|
|
|
|
def test_override_destructor(self):
|
|
tp = self.tp
|
|
record = []
|
|
class MyBufferedIO(tp):
|
|
def __del__(self):
|
|
record.append(1)
|
|
try:
|
|
f = super().__del__
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
f()
|
|
def close(self):
|
|
record.append(2)
|
|
super().close()
|
|
def flush(self):
|
|
record.append(3)
|
|
super().flush()
|
|
rawio = self.MockRawIO()
|
|
bufio = MyBufferedIO(rawio)
|
|
writable = bufio.writable()
|
|
del bufio
|
|
support.gc_collect()
|
|
if writable:
|
|
self.assertEqual(record, [1, 2, 3])
|
|
else:
|
|
self.assertEqual(record, [1, 2])
|
|
|
|
def test_context_manager(self):
|
|
# Test usability as a context manager
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio)
|
|
def _with():
|
|
with bufio:
|
|
pass
|
|
_with()
|
|
# bufio should now be closed, and using it a second time should raise
|
|
# a ValueError.
|
|
self.assertRaises(ValueError, _with)
|
|
|
|
def test_error_through_destructor(self):
|
|
# Test that the exception state is not modified by a destructor,
|
|
# even if close() fails.
|
|
rawio = self.CloseFailureIO()
|
|
def f():
|
|
self.tp(rawio).xyzzy
|
|
with support.captured_output("stderr") as s:
|
|
self.assertRaises(AttributeError, f)
|
|
s = s.getvalue().strip()
|
|
if s:
|
|
# The destructor *may* have printed an unraisable error, check it
|
|
self.assertEqual(len(s.splitlines()), 1)
|
|
self.assertTrue(s.startswith("Exception IOError: "), s)
|
|
self.assertTrue(s.endswith(" ignored"), s)
|
|
|
|
def test_repr(self):
|
|
raw = self.MockRawIO()
|
|
b = self.tp(raw)
|
|
clsname = "%s.%s" % (self.tp.__module__, self.tp.__name__)
|
|
self.assertEqual(repr(b), "<%s>" % clsname)
|
|
raw.name = "dummy"
|
|
self.assertEqual(repr(b), "<%s name='dummy'>" % clsname)
|
|
raw.name = b"dummy"
|
|
self.assertEqual(repr(b), "<%s name=b'dummy'>" % clsname)
|
|
|
|
def test_flush_error_on_close(self):
|
|
raw = self.MockRawIO()
|
|
def bad_flush():
|
|
raise IOError()
|
|
raw.flush = bad_flush
|
|
b = self.tp(raw)
|
|
self.assertRaises(IOError, b.close) # exception not swallowed
|
|
|
|
def test_multi_close(self):
|
|
raw = self.MockRawIO()
|
|
b = self.tp(raw)
|
|
b.close()
|
|
b.close()
|
|
b.close()
|
|
self.assertRaises(ValueError, b.flush)
|
|
|
|
def test_unseekable(self):
|
|
bufio = self.tp(self.MockUnseekableIO(b"A" * 10))
|
|
self.assertRaises(self.UnsupportedOperation, bufio.tell)
|
|
self.assertRaises(self.UnsupportedOperation, bufio.seek, 0)
|
|
|
|
def test_readonly_attributes(self):
|
|
raw = self.MockRawIO()
|
|
buf = self.tp(raw)
|
|
x = self.MockRawIO()
|
|
with self.assertRaises(AttributeError):
|
|
buf.raw = x
|
|
|
|
|
|
class SizeofTest:
|
|
|
|
@support.cpython_only
|
|
def test_sizeof(self):
|
|
bufsize1 = 4096
|
|
bufsize2 = 8192
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio, buffer_size=bufsize1)
|
|
size = sys.getsizeof(bufio) - bufsize1
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio, buffer_size=bufsize2)
|
|
self.assertEqual(sys.getsizeof(bufio), size + bufsize2)
|
|
|
|
|
|
class BufferedReaderTest(unittest.TestCase, CommonBufferedTests):
|
|
read_mode = "rb"
|
|
|
|
def test_constructor(self):
|
|
rawio = self.MockRawIO([b"abc"])
|
|
bufio = self.tp(rawio)
|
|
bufio.__init__(rawio)
|
|
bufio.__init__(rawio, buffer_size=1024)
|
|
bufio.__init__(rawio, buffer_size=16)
|
|
self.assertEqual(b"abc", bufio.read())
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=0)
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=-16)
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=-1)
|
|
rawio = self.MockRawIO([b"abc"])
|
|
bufio.__init__(rawio)
|
|
self.assertEqual(b"abc", bufio.read())
|
|
|
|
def test_read(self):
|
|
for arg in (None, 7):
|
|
rawio = self.MockRawIO((b"abc", b"d", b"efg"))
|
|
bufio = self.tp(rawio)
|
|
self.assertEqual(b"abcdefg", bufio.read(arg))
|
|
# Invalid args
|
|
self.assertRaises(ValueError, bufio.read, -2)
|
|
|
|
def test_read1(self):
|
|
rawio = self.MockRawIO((b"abc", b"d", b"efg"))
|
|
bufio = self.tp(rawio)
|
|
self.assertEqual(b"a", bufio.read(1))
|
|
self.assertEqual(b"b", bufio.read1(1))
|
|
self.assertEqual(rawio._reads, 1)
|
|
self.assertEqual(b"c", bufio.read1(100))
|
|
self.assertEqual(rawio._reads, 1)
|
|
self.assertEqual(b"d", bufio.read1(100))
|
|
self.assertEqual(rawio._reads, 2)
|
|
self.assertEqual(b"efg", bufio.read1(100))
|
|
self.assertEqual(rawio._reads, 3)
|
|
self.assertEqual(b"", bufio.read1(100))
|
|
self.assertEqual(rawio._reads, 4)
|
|
# Invalid args
|
|
self.assertRaises(ValueError, bufio.read1, -1)
|
|
|
|
def test_readinto(self):
|
|
rawio = self.MockRawIO((b"abc", b"d", b"efg"))
|
|
bufio = self.tp(rawio)
|
|
b = bytearray(2)
|
|
self.assertEqual(bufio.readinto(b), 2)
|
|
self.assertEqual(b, b"ab")
|
|
self.assertEqual(bufio.readinto(b), 2)
|
|
self.assertEqual(b, b"cd")
|
|
self.assertEqual(bufio.readinto(b), 2)
|
|
self.assertEqual(b, b"ef")
|
|
self.assertEqual(bufio.readinto(b), 1)
|
|
self.assertEqual(b, b"gf")
|
|
self.assertEqual(bufio.readinto(b), 0)
|
|
self.assertEqual(b, b"gf")
|
|
rawio = self.MockRawIO((b"abc", None))
|
|
bufio = self.tp(rawio)
|
|
self.assertEqual(bufio.readinto(b), 2)
|
|
self.assertEqual(b, b"ab")
|
|
self.assertEqual(bufio.readinto(b), 1)
|
|
self.assertEqual(b, b"cb")
|
|
|
|
def test_readlines(self):
|
|
def bufio():
|
|
rawio = self.MockRawIO((b"abc\n", b"d\n", b"ef"))
|
|
return self.tp(rawio)
|
|
self.assertEqual(bufio().readlines(), [b"abc\n", b"d\n", b"ef"])
|
|
self.assertEqual(bufio().readlines(5), [b"abc\n", b"d\n"])
|
|
self.assertEqual(bufio().readlines(None), [b"abc\n", b"d\n", b"ef"])
|
|
|
|
def test_buffering(self):
|
|
data = b"abcdefghi"
|
|
dlen = len(data)
|
|
|
|
tests = [
|
|
[ 100, [ 3, 1, 4, 8 ], [ dlen, 0 ] ],
|
|
[ 100, [ 3, 3, 3], [ dlen ] ],
|
|
[ 4, [ 1, 2, 4, 2 ], [ 4, 4, 1 ] ],
|
|
]
|
|
|
|
for bufsize, buf_read_sizes, raw_read_sizes in tests:
|
|
rawio = self.MockFileIO(data)
|
|
bufio = self.tp(rawio, buffer_size=bufsize)
|
|
pos = 0
|
|
for nbytes in buf_read_sizes:
|
|
self.assertEqual(bufio.read(nbytes), data[pos:pos+nbytes])
|
|
pos += nbytes
|
|
# this is mildly implementation-dependent
|
|
self.assertEqual(rawio.read_history, raw_read_sizes)
|
|
|
|
def test_read_non_blocking(self):
|
|
# Inject some None's in there to simulate EWOULDBLOCK
|
|
rawio = self.MockRawIO((b"abc", b"d", None, b"efg", None, None, None))
|
|
bufio = self.tp(rawio)
|
|
self.assertEqual(b"abcd", bufio.read(6))
|
|
self.assertEqual(b"e", bufio.read(1))
|
|
self.assertEqual(b"fg", bufio.read())
|
|
self.assertEqual(b"", bufio.peek(1))
|
|
self.assertIsNone(bufio.read())
|
|
self.assertEqual(b"", bufio.read())
|
|
|
|
rawio = self.MockRawIO((b"a", None, None))
|
|
self.assertEqual(b"a", rawio.readall())
|
|
self.assertIsNone(rawio.readall())
|
|
|
|
def test_read_past_eof(self):
|
|
rawio = self.MockRawIO((b"abc", b"d", b"efg"))
|
|
bufio = self.tp(rawio)
|
|
|
|
self.assertEqual(b"abcdefg", bufio.read(9000))
|
|
|
|
def test_read_all(self):
|
|
rawio = self.MockRawIO((b"abc", b"d", b"efg"))
|
|
bufio = self.tp(rawio)
|
|
|
|
self.assertEqual(b"abcdefg", bufio.read())
|
|
|
|
@unittest.skipUnless(threading, 'Threading required for this test.')
|
|
@support.requires_resource('cpu')
|
|
def test_threads(self):
|
|
try:
|
|
# Write out many bytes with exactly the same number of 0's,
|
|
# 1's... 255's. This will help us check that concurrent reading
|
|
# doesn't duplicate or forget contents.
|
|
N = 1000
|
|
l = list(range(256)) * N
|
|
random.shuffle(l)
|
|
s = bytes(bytearray(l))
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
f.write(s)
|
|
with self.open(support.TESTFN, self.read_mode, buffering=0) as raw:
|
|
bufio = self.tp(raw, 8)
|
|
errors = []
|
|
results = []
|
|
def f():
|
|
try:
|
|
# Intra-buffer read then buffer-flushing read
|
|
for n in cycle([1, 19]):
|
|
s = bufio.read(n)
|
|
if not s:
|
|
break
|
|
# list.append() is atomic
|
|
results.append(s)
|
|
except Exception as e:
|
|
errors.append(e)
|
|
raise
|
|
threads = [threading.Thread(target=f) for x in range(20)]
|
|
for t in threads:
|
|
t.start()
|
|
time.sleep(0.02) # yield
|
|
for t in threads:
|
|
t.join()
|
|
self.assertFalse(errors,
|
|
"the following exceptions were caught: %r" % errors)
|
|
s = b''.join(results)
|
|
for i in range(256):
|
|
c = bytes(bytearray([i]))
|
|
self.assertEqual(s.count(c), N)
|
|
finally:
|
|
support.unlink(support.TESTFN)
|
|
|
|
def test_unseekable(self):
|
|
bufio = self.tp(self.MockUnseekableIO(b"A" * 10))
|
|
self.assertRaises(self.UnsupportedOperation, bufio.tell)
|
|
self.assertRaises(self.UnsupportedOperation, bufio.seek, 0)
|
|
bufio.read(1)
|
|
self.assertRaises(self.UnsupportedOperation, bufio.seek, 0)
|
|
self.assertRaises(self.UnsupportedOperation, bufio.tell)
|
|
|
|
def test_misbehaved_io(self):
|
|
rawio = self.MisbehavedRawIO((b"abc", b"d", b"efg"))
|
|
bufio = self.tp(rawio)
|
|
self.assertRaises(IOError, bufio.seek, 0)
|
|
self.assertRaises(IOError, bufio.tell)
|
|
|
|
def test_no_extraneous_read(self):
|
|
# Issue #9550; when the raw IO object has satisfied the read request,
|
|
# we should not issue any additional reads, otherwise it may block
|
|
# (e.g. socket).
|
|
bufsize = 16
|
|
for n in (2, bufsize - 1, bufsize, bufsize + 1, bufsize * 2):
|
|
rawio = self.MockRawIO([b"x" * n])
|
|
bufio = self.tp(rawio, bufsize)
|
|
self.assertEqual(bufio.read(n), b"x" * n)
|
|
# Simple case: one raw read is enough to satisfy the request.
|
|
self.assertEqual(rawio._extraneous_reads, 0,
|
|
"failed for {}: {} != 0".format(n, rawio._extraneous_reads))
|
|
# A more complex case where two raw reads are needed to satisfy
|
|
# the request.
|
|
rawio = self.MockRawIO([b"x" * (n - 1), b"x"])
|
|
bufio = self.tp(rawio, bufsize)
|
|
self.assertEqual(bufio.read(n), b"x" * n)
|
|
self.assertEqual(rawio._extraneous_reads, 0,
|
|
"failed for {}: {} != 0".format(n, rawio._extraneous_reads))
|
|
|
|
|
|
class CBufferedReaderTest(BufferedReaderTest, SizeofTest):
|
|
tp = io.BufferedReader
|
|
|
|
def test_constructor(self):
|
|
BufferedReaderTest.test_constructor(self)
|
|
# The allocation can succeed on 32-bit builds, e.g. with more
|
|
# than 2GB RAM and a 64-bit kernel.
|
|
if sys.maxsize > 0x7FFFFFFF:
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio)
|
|
self.assertRaises((OverflowError, MemoryError, ValueError),
|
|
bufio.__init__, rawio, sys.maxsize)
|
|
|
|
def test_initialization(self):
|
|
rawio = self.MockRawIO([b"abc"])
|
|
bufio = self.tp(rawio)
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=0)
|
|
self.assertRaises(ValueError, bufio.read)
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=-16)
|
|
self.assertRaises(ValueError, bufio.read)
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=-1)
|
|
self.assertRaises(ValueError, bufio.read)
|
|
|
|
def test_misbehaved_io_read(self):
|
|
rawio = self.MisbehavedRawIO((b"abc", b"d", b"efg"))
|
|
bufio = self.tp(rawio)
|
|
# _pyio.BufferedReader seems to implement reading different, so that
|
|
# checking this is not so easy.
|
|
self.assertRaises(IOError, bufio.read, 10)
|
|
|
|
def test_garbage_collection(self):
|
|
# C BufferedReader objects are collected.
|
|
# The Python version has __del__, so it ends into gc.garbage instead
|
|
rawio = self.FileIO(support.TESTFN, "w+b")
|
|
f = self.tp(rawio)
|
|
f.f = f
|
|
wr = weakref.ref(f)
|
|
del f
|
|
support.gc_collect()
|
|
self.assertTrue(wr() is None, wr)
|
|
|
|
class PyBufferedReaderTest(BufferedReaderTest):
|
|
tp = pyio.BufferedReader
|
|
|
|
|
|
class BufferedWriterTest(unittest.TestCase, CommonBufferedTests):
|
|
write_mode = "wb"
|
|
|
|
def test_constructor(self):
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio)
|
|
bufio.__init__(rawio)
|
|
bufio.__init__(rawio, buffer_size=1024)
|
|
bufio.__init__(rawio, buffer_size=16)
|
|
self.assertEqual(3, bufio.write(b"abc"))
|
|
bufio.flush()
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=0)
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=-16)
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=-1)
|
|
bufio.__init__(rawio)
|
|
self.assertEqual(3, bufio.write(b"ghi"))
|
|
bufio.flush()
|
|
self.assertEqual(b"".join(rawio._write_stack), b"abcghi")
|
|
|
|
def test_detach_flush(self):
|
|
raw = self.MockRawIO()
|
|
buf = self.tp(raw)
|
|
buf.write(b"howdy!")
|
|
self.assertFalse(raw._write_stack)
|
|
buf.detach()
|
|
self.assertEqual(raw._write_stack, [b"howdy!"])
|
|
|
|
def test_write(self):
|
|
# Write to the buffered IO but don't overflow the buffer.
|
|
writer = self.MockRawIO()
|
|
bufio = self.tp(writer, 8)
|
|
bufio.write(b"abc")
|
|
self.assertFalse(writer._write_stack)
|
|
|
|
def test_write_overflow(self):
|
|
writer = self.MockRawIO()
|
|
bufio = self.tp(writer, 8)
|
|
contents = b"abcdefghijklmnop"
|
|
for n in range(0, len(contents), 3):
|
|
bufio.write(contents[n:n+3])
|
|
flushed = b"".join(writer._write_stack)
|
|
# At least (total - 8) bytes were implicitly flushed, perhaps more
|
|
# depending on the implementation.
|
|
self.assertTrue(flushed.startswith(contents[:-8]), flushed)
|
|
|
|
def check_writes(self, intermediate_func):
|
|
# Lots of writes, test the flushed output is as expected.
|
|
contents = bytes(range(256)) * 1000
|
|
n = 0
|
|
writer = self.MockRawIO()
|
|
bufio = self.tp(writer, 13)
|
|
# Generator of write sizes: repeat each N 15 times then proceed to N+1
|
|
def gen_sizes():
|
|
for size in count(1):
|
|
for i in range(15):
|
|
yield size
|
|
sizes = gen_sizes()
|
|
while n < len(contents):
|
|
size = min(next(sizes), len(contents) - n)
|
|
self.assertEqual(bufio.write(contents[n:n+size]), size)
|
|
intermediate_func(bufio)
|
|
n += size
|
|
bufio.flush()
|
|
self.assertEqual(contents, b"".join(writer._write_stack))
|
|
|
|
def test_writes(self):
|
|
self.check_writes(lambda bufio: None)
|
|
|
|
def test_writes_and_flushes(self):
|
|
self.check_writes(lambda bufio: bufio.flush())
|
|
|
|
def test_writes_and_seeks(self):
|
|
def _seekabs(bufio):
|
|
pos = bufio.tell()
|
|
bufio.seek(pos + 1, 0)
|
|
bufio.seek(pos - 1, 0)
|
|
bufio.seek(pos, 0)
|
|
self.check_writes(_seekabs)
|
|
def _seekrel(bufio):
|
|
pos = bufio.seek(0, 1)
|
|
bufio.seek(+1, 1)
|
|
bufio.seek(-1, 1)
|
|
bufio.seek(pos, 0)
|
|
self.check_writes(_seekrel)
|
|
|
|
def test_writes_and_truncates(self):
|
|
self.check_writes(lambda bufio: bufio.truncate(bufio.tell()))
|
|
|
|
def test_write_non_blocking(self):
|
|
raw = self.MockNonBlockWriterIO()
|
|
bufio = self.tp(raw, 8)
|
|
|
|
self.assertEqual(bufio.write(b"abcd"), 4)
|
|
self.assertEqual(bufio.write(b"efghi"), 5)
|
|
# 1 byte will be written, the rest will be buffered
|
|
raw.block_on(b"k")
|
|
self.assertEqual(bufio.write(b"jklmn"), 5)
|
|
|
|
# 8 bytes will be written, 8 will be buffered and the rest will be lost
|
|
raw.block_on(b"0")
|
|
try:
|
|
bufio.write(b"opqrwxyz0123456789")
|
|
except self.BlockingIOError as e:
|
|
written = e.characters_written
|
|
else:
|
|
self.fail("BlockingIOError should have been raised")
|
|
self.assertEqual(written, 16)
|
|
self.assertEqual(raw.pop_written(),
|
|
b"abcdefghijklmnopqrwxyz")
|
|
|
|
self.assertEqual(bufio.write(b"ABCDEFGHI"), 9)
|
|
s = raw.pop_written()
|
|
# Previously buffered bytes were flushed
|
|
self.assertTrue(s.startswith(b"01234567A"), s)
|
|
|
|
def test_write_and_rewind(self):
|
|
raw = io.BytesIO()
|
|
bufio = self.tp(raw, 4)
|
|
self.assertEqual(bufio.write(b"abcdef"), 6)
|
|
self.assertEqual(bufio.tell(), 6)
|
|
bufio.seek(0, 0)
|
|
self.assertEqual(bufio.write(b"XY"), 2)
|
|
bufio.seek(6, 0)
|
|
self.assertEqual(raw.getvalue(), b"XYcdef")
|
|
self.assertEqual(bufio.write(b"123456"), 6)
|
|
bufio.flush()
|
|
self.assertEqual(raw.getvalue(), b"XYcdef123456")
|
|
|
|
def test_flush(self):
|
|
writer = self.MockRawIO()
|
|
bufio = self.tp(writer, 8)
|
|
bufio.write(b"abc")
|
|
bufio.flush()
|
|
self.assertEqual(b"abc", writer._write_stack[0])
|
|
|
|
def test_destructor(self):
|
|
writer = self.MockRawIO()
|
|
bufio = self.tp(writer, 8)
|
|
bufio.write(b"abc")
|
|
del bufio
|
|
support.gc_collect()
|
|
self.assertEqual(b"abc", writer._write_stack[0])
|
|
|
|
def test_truncate(self):
|
|
# Truncate implicitly flushes the buffer.
|
|
with self.open(support.TESTFN, self.write_mode, buffering=0) as raw:
|
|
bufio = self.tp(raw, 8)
|
|
bufio.write(b"abcdef")
|
|
self.assertEqual(bufio.truncate(3), 3)
|
|
self.assertEqual(bufio.tell(), 6)
|
|
with self.open(support.TESTFN, "rb", buffering=0) as f:
|
|
self.assertEqual(f.read(), b"abc")
|
|
|
|
@unittest.skipUnless(threading, 'Threading required for this test.')
|
|
@support.requires_resource('cpu')
|
|
def test_threads(self):
|
|
try:
|
|
# Write out many bytes from many threads and test they were
|
|
# all flushed.
|
|
N = 1000
|
|
contents = bytes(range(256)) * N
|
|
sizes = cycle([1, 19])
|
|
n = 0
|
|
queue = deque()
|
|
while n < len(contents):
|
|
size = next(sizes)
|
|
queue.append(contents[n:n+size])
|
|
n += size
|
|
del contents
|
|
# We use a real file object because it allows us to
|
|
# exercise situations where the GIL is released before
|
|
# writing the buffer to the raw streams. This is in addition
|
|
# to concurrency issues due to switching threads in the middle
|
|
# of Python code.
|
|
with self.open(support.TESTFN, self.write_mode, buffering=0) as raw:
|
|
bufio = self.tp(raw, 8)
|
|
errors = []
|
|
def f():
|
|
try:
|
|
while True:
|
|
try:
|
|
s = queue.popleft()
|
|
except IndexError:
|
|
return
|
|
bufio.write(s)
|
|
except Exception as e:
|
|
errors.append(e)
|
|
raise
|
|
threads = [threading.Thread(target=f) for x in range(20)]
|
|
for t in threads:
|
|
t.start()
|
|
time.sleep(0.02) # yield
|
|
for t in threads:
|
|
t.join()
|
|
self.assertFalse(errors,
|
|
"the following exceptions were caught: %r" % errors)
|
|
bufio.close()
|
|
with self.open(support.TESTFN, "rb") as f:
|
|
s = f.read()
|
|
for i in range(256):
|
|
self.assertEqual(s.count(bytes([i])), N)
|
|
finally:
|
|
support.unlink(support.TESTFN)
|
|
|
|
def test_misbehaved_io(self):
|
|
rawio = self.MisbehavedRawIO()
|
|
bufio = self.tp(rawio, 5)
|
|
self.assertRaises(IOError, bufio.seek, 0)
|
|
self.assertRaises(IOError, bufio.tell)
|
|
self.assertRaises(IOError, bufio.write, b"abcdef")
|
|
|
|
def test_max_buffer_size_removal(self):
|
|
with self.assertRaises(TypeError):
|
|
self.tp(self.MockRawIO(), 8, 12)
|
|
|
|
|
|
class CBufferedWriterTest(BufferedWriterTest, SizeofTest):
|
|
tp = io.BufferedWriter
|
|
|
|
def test_constructor(self):
|
|
BufferedWriterTest.test_constructor(self)
|
|
# The allocation can succeed on 32-bit builds, e.g. with more
|
|
# than 2GB RAM and a 64-bit kernel.
|
|
if sys.maxsize > 0x7FFFFFFF:
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio)
|
|
self.assertRaises((OverflowError, MemoryError, ValueError),
|
|
bufio.__init__, rawio, sys.maxsize)
|
|
|
|
def test_initialization(self):
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio)
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=0)
|
|
self.assertRaises(ValueError, bufio.write, b"def")
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=-16)
|
|
self.assertRaises(ValueError, bufio.write, b"def")
|
|
self.assertRaises(ValueError, bufio.__init__, rawio, buffer_size=-1)
|
|
self.assertRaises(ValueError, bufio.write, b"def")
|
|
|
|
def test_garbage_collection(self):
|
|
# C BufferedWriter objects are collected, and collecting them flushes
|
|
# all data to disk.
|
|
# The Python version has __del__, so it ends into gc.garbage instead
|
|
rawio = self.FileIO(support.TESTFN, "w+b")
|
|
f = self.tp(rawio)
|
|
f.write(b"123xxx")
|
|
f.x = f
|
|
wr = weakref.ref(f)
|
|
del f
|
|
support.gc_collect()
|
|
self.assertTrue(wr() is None, wr)
|
|
with self.open(support.TESTFN, "rb") as f:
|
|
self.assertEqual(f.read(), b"123xxx")
|
|
|
|
|
|
class PyBufferedWriterTest(BufferedWriterTest):
|
|
tp = pyio.BufferedWriter
|
|
|
|
class BufferedRWPairTest(unittest.TestCase):
|
|
|
|
def test_constructor(self):
|
|
pair = self.tp(self.MockRawIO(), self.MockRawIO())
|
|
self.assertFalse(pair.closed)
|
|
|
|
def test_detach(self):
|
|
pair = self.tp(self.MockRawIO(), self.MockRawIO())
|
|
self.assertRaises(self.UnsupportedOperation, pair.detach)
|
|
|
|
def test_constructor_max_buffer_size_removal(self):
|
|
with self.assertRaises(TypeError):
|
|
self.tp(self.MockRawIO(), self.MockRawIO(), 8, 12)
|
|
|
|
def test_constructor_with_not_readable(self):
|
|
class NotReadable(MockRawIO):
|
|
def readable(self):
|
|
return False
|
|
|
|
self.assertRaises(IOError, self.tp, NotReadable(), self.MockRawIO())
|
|
|
|
def test_constructor_with_not_writeable(self):
|
|
class NotWriteable(MockRawIO):
|
|
def writable(self):
|
|
return False
|
|
|
|
self.assertRaises(IOError, self.tp, self.MockRawIO(), NotWriteable())
|
|
|
|
def test_read(self):
|
|
pair = self.tp(self.BytesIO(b"abcdef"), self.MockRawIO())
|
|
|
|
self.assertEqual(pair.read(3), b"abc")
|
|
self.assertEqual(pair.read(1), b"d")
|
|
self.assertEqual(pair.read(), b"ef")
|
|
pair = self.tp(self.BytesIO(b"abc"), self.MockRawIO())
|
|
self.assertEqual(pair.read(None), b"abc")
|
|
|
|
def test_readlines(self):
|
|
pair = lambda: self.tp(self.BytesIO(b"abc\ndef\nh"), self.MockRawIO())
|
|
self.assertEqual(pair().readlines(), [b"abc\n", b"def\n", b"h"])
|
|
self.assertEqual(pair().readlines(), [b"abc\n", b"def\n", b"h"])
|
|
self.assertEqual(pair().readlines(5), [b"abc\n", b"def\n"])
|
|
|
|
def test_read1(self):
|
|
# .read1() is delegated to the underlying reader object, so this test
|
|
# can be shallow.
|
|
pair = self.tp(self.BytesIO(b"abcdef"), self.MockRawIO())
|
|
|
|
self.assertEqual(pair.read1(3), b"abc")
|
|
|
|
def test_readinto(self):
|
|
pair = self.tp(self.BytesIO(b"abcdef"), self.MockRawIO())
|
|
|
|
data = bytearray(5)
|
|
self.assertEqual(pair.readinto(data), 5)
|
|
self.assertEqual(data, b"abcde")
|
|
|
|
def test_write(self):
|
|
w = self.MockRawIO()
|
|
pair = self.tp(self.MockRawIO(), w)
|
|
|
|
pair.write(b"abc")
|
|
pair.flush()
|
|
pair.write(b"def")
|
|
pair.flush()
|
|
self.assertEqual(w._write_stack, [b"abc", b"def"])
|
|
|
|
def test_peek(self):
|
|
pair = self.tp(self.BytesIO(b"abcdef"), self.MockRawIO())
|
|
|
|
self.assertTrue(pair.peek(3).startswith(b"abc"))
|
|
self.assertEqual(pair.read(3), b"abc")
|
|
|
|
def test_readable(self):
|
|
pair = self.tp(self.MockRawIO(), self.MockRawIO())
|
|
self.assertTrue(pair.readable())
|
|
|
|
def test_writeable(self):
|
|
pair = self.tp(self.MockRawIO(), self.MockRawIO())
|
|
self.assertTrue(pair.writable())
|
|
|
|
def test_seekable(self):
|
|
# BufferedRWPairs are never seekable, even if their readers and writers
|
|
# are.
|
|
pair = self.tp(self.MockRawIO(), self.MockRawIO())
|
|
self.assertFalse(pair.seekable())
|
|
|
|
# .flush() is delegated to the underlying writer object and has been
|
|
# tested in the test_write method.
|
|
|
|
def test_close_and_closed(self):
|
|
pair = self.tp(self.MockRawIO(), self.MockRawIO())
|
|
self.assertFalse(pair.closed)
|
|
pair.close()
|
|
self.assertTrue(pair.closed)
|
|
|
|
def test_isatty(self):
|
|
class SelectableIsAtty(MockRawIO):
|
|
def __init__(self, isatty):
|
|
MockRawIO.__init__(self)
|
|
self._isatty = isatty
|
|
|
|
def isatty(self):
|
|
return self._isatty
|
|
|
|
pair = self.tp(SelectableIsAtty(False), SelectableIsAtty(False))
|
|
self.assertFalse(pair.isatty())
|
|
|
|
pair = self.tp(SelectableIsAtty(True), SelectableIsAtty(False))
|
|
self.assertTrue(pair.isatty())
|
|
|
|
pair = self.tp(SelectableIsAtty(False), SelectableIsAtty(True))
|
|
self.assertTrue(pair.isatty())
|
|
|
|
pair = self.tp(SelectableIsAtty(True), SelectableIsAtty(True))
|
|
self.assertTrue(pair.isatty())
|
|
|
|
class CBufferedRWPairTest(BufferedRWPairTest):
|
|
tp = io.BufferedRWPair
|
|
|
|
class PyBufferedRWPairTest(BufferedRWPairTest):
|
|
tp = pyio.BufferedRWPair
|
|
|
|
|
|
class BufferedRandomTest(BufferedReaderTest, BufferedWriterTest):
|
|
read_mode = "rb+"
|
|
write_mode = "wb+"
|
|
|
|
def test_constructor(self):
|
|
BufferedReaderTest.test_constructor(self)
|
|
BufferedWriterTest.test_constructor(self)
|
|
|
|
def test_read_and_write(self):
|
|
raw = self.MockRawIO((b"asdf", b"ghjk"))
|
|
rw = self.tp(raw, 8)
|
|
|
|
self.assertEqual(b"as", rw.read(2))
|
|
rw.write(b"ddd")
|
|
rw.write(b"eee")
|
|
self.assertFalse(raw._write_stack) # Buffer writes
|
|
self.assertEqual(b"ghjk", rw.read())
|
|
self.assertEqual(b"dddeee", raw._write_stack[0])
|
|
|
|
def test_seek_and_tell(self):
|
|
raw = self.BytesIO(b"asdfghjkl")
|
|
rw = self.tp(raw)
|
|
|
|
self.assertEqual(b"as", rw.read(2))
|
|
self.assertEqual(2, rw.tell())
|
|
rw.seek(0, 0)
|
|
self.assertEqual(b"asdf", rw.read(4))
|
|
|
|
rw.write(b"123f")
|
|
rw.seek(0, 0)
|
|
self.assertEqual(b"asdf123fl", rw.read())
|
|
self.assertEqual(9, rw.tell())
|
|
rw.seek(-4, 2)
|
|
self.assertEqual(5, rw.tell())
|
|
rw.seek(2, 1)
|
|
self.assertEqual(7, rw.tell())
|
|
self.assertEqual(b"fl", rw.read(11))
|
|
rw.flush()
|
|
self.assertEqual(b"asdf123fl", raw.getvalue())
|
|
|
|
self.assertRaises(TypeError, rw.seek, 0.0)
|
|
|
|
def check_flush_and_read(self, read_func):
|
|
raw = self.BytesIO(b"abcdefghi")
|
|
bufio = self.tp(raw)
|
|
|
|
self.assertEqual(b"ab", read_func(bufio, 2))
|
|
bufio.write(b"12")
|
|
self.assertEqual(b"ef", read_func(bufio, 2))
|
|
self.assertEqual(6, bufio.tell())
|
|
bufio.flush()
|
|
self.assertEqual(6, bufio.tell())
|
|
self.assertEqual(b"ghi", read_func(bufio))
|
|
raw.seek(0, 0)
|
|
raw.write(b"XYZ")
|
|
# flush() resets the read buffer
|
|
bufio.flush()
|
|
bufio.seek(0, 0)
|
|
self.assertEqual(b"XYZ", read_func(bufio, 3))
|
|
|
|
def test_flush_and_read(self):
|
|
self.check_flush_and_read(lambda bufio, *args: bufio.read(*args))
|
|
|
|
def test_flush_and_readinto(self):
|
|
def _readinto(bufio, n=-1):
|
|
b = bytearray(n if n >= 0 else 9999)
|
|
n = bufio.readinto(b)
|
|
return bytes(b[:n])
|
|
self.check_flush_and_read(_readinto)
|
|
|
|
def test_flush_and_peek(self):
|
|
def _peek(bufio, n=-1):
|
|
# This relies on the fact that the buffer can contain the whole
|
|
# raw stream, otherwise peek() can return less.
|
|
b = bufio.peek(n)
|
|
if n != -1:
|
|
b = b[:n]
|
|
bufio.seek(len(b), 1)
|
|
return b
|
|
self.check_flush_and_read(_peek)
|
|
|
|
def test_flush_and_write(self):
|
|
raw = self.BytesIO(b"abcdefghi")
|
|
bufio = self.tp(raw)
|
|
|
|
bufio.write(b"123")
|
|
bufio.flush()
|
|
bufio.write(b"45")
|
|
bufio.flush()
|
|
bufio.seek(0, 0)
|
|
self.assertEqual(b"12345fghi", raw.getvalue())
|
|
self.assertEqual(b"12345fghi", bufio.read())
|
|
|
|
def test_threads(self):
|
|
BufferedReaderTest.test_threads(self)
|
|
BufferedWriterTest.test_threads(self)
|
|
|
|
def test_writes_and_peek(self):
|
|
def _peek(bufio):
|
|
bufio.peek(1)
|
|
self.check_writes(_peek)
|
|
def _peek(bufio):
|
|
pos = bufio.tell()
|
|
bufio.seek(-1, 1)
|
|
bufio.peek(1)
|
|
bufio.seek(pos, 0)
|
|
self.check_writes(_peek)
|
|
|
|
def test_writes_and_reads(self):
|
|
def _read(bufio):
|
|
bufio.seek(-1, 1)
|
|
bufio.read(1)
|
|
self.check_writes(_read)
|
|
|
|
def test_writes_and_read1s(self):
|
|
def _read1(bufio):
|
|
bufio.seek(-1, 1)
|
|
bufio.read1(1)
|
|
self.check_writes(_read1)
|
|
|
|
def test_writes_and_readintos(self):
|
|
def _read(bufio):
|
|
bufio.seek(-1, 1)
|
|
bufio.readinto(bytearray(1))
|
|
self.check_writes(_read)
|
|
|
|
def test_write_after_readahead(self):
|
|
# Issue #6629: writing after the buffer was filled by readahead should
|
|
# first rewind the raw stream.
|
|
for overwrite_size in [1, 5]:
|
|
raw = self.BytesIO(b"A" * 10)
|
|
bufio = self.tp(raw, 4)
|
|
# Trigger readahead
|
|
self.assertEqual(bufio.read(1), b"A")
|
|
self.assertEqual(bufio.tell(), 1)
|
|
# Overwriting should rewind the raw stream if it needs so
|
|
bufio.write(b"B" * overwrite_size)
|
|
self.assertEqual(bufio.tell(), overwrite_size + 1)
|
|
# If the write size was smaller than the buffer size, flush() and
|
|
# check that rewind happens.
|
|
bufio.flush()
|
|
self.assertEqual(bufio.tell(), overwrite_size + 1)
|
|
s = raw.getvalue()
|
|
self.assertEqual(s,
|
|
b"A" + b"B" * overwrite_size + b"A" * (9 - overwrite_size))
|
|
|
|
def test_write_rewind_write(self):
|
|
# Various combinations of reading / writing / seeking backwards / writing again
|
|
def mutate(bufio, pos1, pos2):
|
|
assert pos2 >= pos1
|
|
# Fill the buffer
|
|
bufio.seek(pos1)
|
|
bufio.read(pos2 - pos1)
|
|
bufio.write(b'\x02')
|
|
# This writes earlier than the previous write, but still inside
|
|
# the buffer.
|
|
bufio.seek(pos1)
|
|
bufio.write(b'\x01')
|
|
|
|
b = b"\x80\x81\x82\x83\x84"
|
|
for i in range(0, len(b)):
|
|
for j in range(i, len(b)):
|
|
raw = self.BytesIO(b)
|
|
bufio = self.tp(raw, 100)
|
|
mutate(bufio, i, j)
|
|
bufio.flush()
|
|
expected = bytearray(b)
|
|
expected[j] = 2
|
|
expected[i] = 1
|
|
self.assertEqual(raw.getvalue(), expected,
|
|
"failed result for i=%d, j=%d" % (i, j))
|
|
|
|
def test_truncate_after_read_or_write(self):
|
|
raw = self.BytesIO(b"A" * 10)
|
|
bufio = self.tp(raw, 100)
|
|
self.assertEqual(bufio.read(2), b"AA") # the read buffer gets filled
|
|
self.assertEqual(bufio.truncate(), 2)
|
|
self.assertEqual(bufio.write(b"BB"), 2) # the write buffer increases
|
|
self.assertEqual(bufio.truncate(), 4)
|
|
|
|
def test_misbehaved_io(self):
|
|
BufferedReaderTest.test_misbehaved_io(self)
|
|
BufferedWriterTest.test_misbehaved_io(self)
|
|
|
|
def test_interleaved_read_write(self):
|
|
# Test for issue #12213
|
|
with self.BytesIO(b'abcdefgh') as raw:
|
|
with self.tp(raw, 100) as f:
|
|
f.write(b"1")
|
|
self.assertEqual(f.read(1), b'b')
|
|
f.write(b'2')
|
|
self.assertEqual(f.read1(1), b'd')
|
|
f.write(b'3')
|
|
buf = bytearray(1)
|
|
f.readinto(buf)
|
|
self.assertEqual(buf, b'f')
|
|
f.write(b'4')
|
|
self.assertEqual(f.peek(1), b'h')
|
|
f.flush()
|
|
self.assertEqual(raw.getvalue(), b'1b2d3f4h')
|
|
|
|
with self.BytesIO(b'abc') as raw:
|
|
with self.tp(raw, 100) as f:
|
|
self.assertEqual(f.read(1), b'a')
|
|
f.write(b"2")
|
|
self.assertEqual(f.read(1), b'c')
|
|
f.flush()
|
|
self.assertEqual(raw.getvalue(), b'a2c')
|
|
|
|
def test_interleaved_readline_write(self):
|
|
with self.BytesIO(b'ab\ncdef\ng\n') as raw:
|
|
with self.tp(raw) as f:
|
|
f.write(b'1')
|
|
self.assertEqual(f.readline(), b'b\n')
|
|
f.write(b'2')
|
|
self.assertEqual(f.readline(), b'def\n')
|
|
f.write(b'3')
|
|
self.assertEqual(f.readline(), b'\n')
|
|
f.flush()
|
|
self.assertEqual(raw.getvalue(), b'1b\n2def\n3\n')
|
|
|
|
# You can't construct a BufferedRandom over a non-seekable stream.
|
|
test_unseekable = None
|
|
|
|
class CBufferedRandomTest(BufferedRandomTest, SizeofTest):
|
|
tp = io.BufferedRandom
|
|
|
|
def test_constructor(self):
|
|
BufferedRandomTest.test_constructor(self)
|
|
# The allocation can succeed on 32-bit builds, e.g. with more
|
|
# than 2GB RAM and a 64-bit kernel.
|
|
if sys.maxsize > 0x7FFFFFFF:
|
|
rawio = self.MockRawIO()
|
|
bufio = self.tp(rawio)
|
|
self.assertRaises((OverflowError, MemoryError, ValueError),
|
|
bufio.__init__, rawio, sys.maxsize)
|
|
|
|
def test_garbage_collection(self):
|
|
CBufferedReaderTest.test_garbage_collection(self)
|
|
CBufferedWriterTest.test_garbage_collection(self)
|
|
|
|
class PyBufferedRandomTest(BufferedRandomTest):
|
|
tp = pyio.BufferedRandom
|
|
|
|
|
|
# To fully exercise seek/tell, the StatefulIncrementalDecoder has these
|
|
# properties:
|
|
# - A single output character can correspond to many bytes of input.
|
|
# - The number of input bytes to complete the character can be
|
|
# undetermined until the last input byte is received.
|
|
# - The number of input bytes can vary depending on previous input.
|
|
# - A single input byte can correspond to many characters of output.
|
|
# - The number of output characters can be undetermined until the
|
|
# last input byte is received.
|
|
# - The number of output characters can vary depending on previous input.
|
|
|
|
class StatefulIncrementalDecoder(codecs.IncrementalDecoder):
|
|
"""
|
|
For testing seek/tell behavior with a stateful, buffering decoder.
|
|
|
|
Input is a sequence of words. Words may be fixed-length (length set
|
|
by input) or variable-length (period-terminated). In variable-length
|
|
mode, extra periods are ignored. Possible words are:
|
|
- 'i' followed by a number sets the input length, I (maximum 99).
|
|
When I is set to 0, words are space-terminated.
|
|
- 'o' followed by a number sets the output length, O (maximum 99).
|
|
- Any other word is converted into a word followed by a period on
|
|
the output. The output word consists of the input word truncated
|
|
or padded out with hyphens to make its length equal to O. If O
|
|
is 0, the word is output verbatim without truncating or padding.
|
|
I and O are initially set to 1. When I changes, any buffered input is
|
|
re-scanned according to the new I. EOF also terminates the last word.
|
|
"""
|
|
|
|
def __init__(self, errors='strict'):
|
|
codecs.IncrementalDecoder.__init__(self, errors)
|
|
self.reset()
|
|
|
|
def __repr__(self):
|
|
return '<SID %x>' % id(self)
|
|
|
|
def reset(self):
|
|
self.i = 1
|
|
self.o = 1
|
|
self.buffer = bytearray()
|
|
|
|
def getstate(self):
|
|
i, o = self.i ^ 1, self.o ^ 1 # so that flags = 0 after reset()
|
|
return bytes(self.buffer), i*100 + o
|
|
|
|
def setstate(self, state):
|
|
buffer, io = state
|
|
self.buffer = bytearray(buffer)
|
|
i, o = divmod(io, 100)
|
|
self.i, self.o = i ^ 1, o ^ 1
|
|
|
|
def decode(self, input, final=False):
|
|
output = ''
|
|
for b in input:
|
|
if self.i == 0: # variable-length, terminated with period
|
|
if b == ord('.'):
|
|
if self.buffer:
|
|
output += self.process_word()
|
|
else:
|
|
self.buffer.append(b)
|
|
else: # fixed-length, terminate after self.i bytes
|
|
self.buffer.append(b)
|
|
if len(self.buffer) == self.i:
|
|
output += self.process_word()
|
|
if final and self.buffer: # EOF terminates the last word
|
|
output += self.process_word()
|
|
return output
|
|
|
|
def process_word(self):
|
|
output = ''
|
|
if self.buffer[0] == ord('i'):
|
|
self.i = min(99, int(self.buffer[1:] or 0)) # set input length
|
|
elif self.buffer[0] == ord('o'):
|
|
self.o = min(99, int(self.buffer[1:] or 0)) # set output length
|
|
else:
|
|
output = self.buffer.decode('ascii')
|
|
if len(output) < self.o:
|
|
output += '-'*self.o # pad out with hyphens
|
|
if self.o:
|
|
output = output[:self.o] # truncate to output length
|
|
output += '.'
|
|
self.buffer = bytearray()
|
|
return output
|
|
|
|
codecEnabled = False
|
|
|
|
@classmethod
|
|
def lookupTestDecoder(cls, name):
|
|
if cls.codecEnabled and name == 'test_decoder':
|
|
latin1 = codecs.lookup('latin-1')
|
|
return codecs.CodecInfo(
|
|
name='test_decoder', encode=latin1.encode, decode=None,
|
|
incrementalencoder=None,
|
|
streamreader=None, streamwriter=None,
|
|
incrementaldecoder=cls)
|
|
|
|
# Register the previous decoder for testing.
|
|
# Disabled by default, tests will enable it.
|
|
codecs.register(StatefulIncrementalDecoder.lookupTestDecoder)
|
|
|
|
|
|
class StatefulIncrementalDecoderTest(unittest.TestCase):
|
|
"""
|
|
Make sure the StatefulIncrementalDecoder actually works.
|
|
"""
|
|
|
|
test_cases = [
|
|
# I=1, O=1 (fixed-length input == fixed-length output)
|
|
(b'abcd', False, 'a.b.c.d.'),
|
|
# I=0, O=0 (variable-length input, variable-length output)
|
|
(b'oiabcd', True, 'abcd.'),
|
|
# I=0, O=0 (should ignore extra periods)
|
|
(b'oi...abcd...', True, 'abcd.'),
|
|
# I=0, O=6 (variable-length input, fixed-length output)
|
|
(b'i.o6.x.xyz.toolongtofit.', False, 'x-----.xyz---.toolon.'),
|
|
# I=2, O=6 (fixed-length input < fixed-length output)
|
|
(b'i.i2.o6xyz', True, 'xy----.z-----.'),
|
|
# I=6, O=3 (fixed-length input > fixed-length output)
|
|
(b'i.o3.i6.abcdefghijklmnop', True, 'abc.ghi.mno.'),
|
|
# I=0, then 3; O=29, then 15 (with longer output)
|
|
(b'i.o29.a.b.cde.o15.abcdefghijabcdefghij.i3.a.b.c.d.ei00k.l.m', True,
|
|
'a----------------------------.' +
|
|
'b----------------------------.' +
|
|
'cde--------------------------.' +
|
|
'abcdefghijabcde.' +
|
|
'a.b------------.' +
|
|
'.c.------------.' +
|
|
'd.e------------.' +
|
|
'k--------------.' +
|
|
'l--------------.' +
|
|
'm--------------.')
|
|
]
|
|
|
|
def test_decoder(self):
|
|
# Try a few one-shot test cases.
|
|
for input, eof, output in self.test_cases:
|
|
d = StatefulIncrementalDecoder()
|
|
self.assertEqual(d.decode(input, eof), output)
|
|
|
|
# Also test an unfinished decode, followed by forcing EOF.
|
|
d = StatefulIncrementalDecoder()
|
|
self.assertEqual(d.decode(b'oiabcd'), '')
|
|
self.assertEqual(d.decode(b'', 1), 'abcd.')
|
|
|
|
class TextIOWrapperTest(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.testdata = b"AAA\r\nBBB\rCCC\r\nDDD\nEEE\r\n"
|
|
self.normalized = b"AAA\nBBB\nCCC\nDDD\nEEE\n".decode("ascii")
|
|
support.unlink(support.TESTFN)
|
|
|
|
def tearDown(self):
|
|
support.unlink(support.TESTFN)
|
|
|
|
def test_constructor(self):
|
|
r = self.BytesIO(b"\xc3\xa9\n\n")
|
|
b = self.BufferedReader(r, 1000)
|
|
t = self.TextIOWrapper(b)
|
|
t.__init__(b, encoding="latin-1", newline="\r\n")
|
|
self.assertEqual(t.encoding, "latin-1")
|
|
self.assertEqual(t.line_buffering, False)
|
|
t.__init__(b, encoding="utf-8", line_buffering=True)
|
|
self.assertEqual(t.encoding, "utf-8")
|
|
self.assertEqual(t.line_buffering, True)
|
|
self.assertEqual("\xe9\n", t.readline())
|
|
self.assertRaises(TypeError, t.__init__, b, newline=42)
|
|
self.assertRaises(ValueError, t.__init__, b, newline='xyzzy')
|
|
|
|
def test_detach(self):
|
|
r = self.BytesIO()
|
|
b = self.BufferedWriter(r)
|
|
t = self.TextIOWrapper(b)
|
|
self.assertIs(t.detach(), b)
|
|
|
|
t = self.TextIOWrapper(b, encoding="ascii")
|
|
t.write("howdy")
|
|
self.assertFalse(r.getvalue())
|
|
t.detach()
|
|
self.assertEqual(r.getvalue(), b"howdy")
|
|
self.assertRaises(ValueError, t.detach)
|
|
|
|
def test_repr(self):
|
|
raw = self.BytesIO("hello".encode("utf-8"))
|
|
b = self.BufferedReader(raw)
|
|
t = self.TextIOWrapper(b, encoding="utf-8")
|
|
modname = self.TextIOWrapper.__module__
|
|
self.assertEqual(repr(t),
|
|
"<%s.TextIOWrapper encoding='utf-8'>" % modname)
|
|
raw.name = "dummy"
|
|
self.assertEqual(repr(t),
|
|
"<%s.TextIOWrapper name='dummy' encoding='utf-8'>" % modname)
|
|
t.mode = "r"
|
|
self.assertEqual(repr(t),
|
|
"<%s.TextIOWrapper name='dummy' mode='r' encoding='utf-8'>" % modname)
|
|
raw.name = b"dummy"
|
|
self.assertEqual(repr(t),
|
|
"<%s.TextIOWrapper name=b'dummy' mode='r' encoding='utf-8'>" % modname)
|
|
|
|
def test_line_buffering(self):
|
|
r = self.BytesIO()
|
|
b = self.BufferedWriter(r, 1000)
|
|
t = self.TextIOWrapper(b, newline="\n", line_buffering=True)
|
|
t.write("X")
|
|
self.assertEqual(r.getvalue(), b"") # No flush happened
|
|
t.write("Y\nZ")
|
|
self.assertEqual(r.getvalue(), b"XY\nZ") # All got flushed
|
|
t.write("A\rB")
|
|
self.assertEqual(r.getvalue(), b"XY\nZA\rB")
|
|
|
|
def test_default_encoding(self):
|
|
old_environ = dict(os.environ)
|
|
try:
|
|
# try to get a user preferred encoding different than the current
|
|
# locale encoding to check that TextIOWrapper() uses the current
|
|
# locale encoding and not the user preferred encoding
|
|
for key in ('LC_ALL', 'LANG', 'LC_CTYPE'):
|
|
if key in os.environ:
|
|
del os.environ[key]
|
|
|
|
current_locale_encoding = locale.getpreferredencoding(False)
|
|
b = self.BytesIO()
|
|
t = self.TextIOWrapper(b)
|
|
self.assertEqual(t.encoding, current_locale_encoding)
|
|
finally:
|
|
os.environ.clear()
|
|
os.environ.update(old_environ)
|
|
|
|
def test_encoding(self):
|
|
# Check the encoding attribute is always set, and valid
|
|
b = self.BytesIO()
|
|
t = self.TextIOWrapper(b, encoding="utf-8")
|
|
self.assertEqual(t.encoding, "utf-8")
|
|
t = self.TextIOWrapper(b)
|
|
self.assertTrue(t.encoding is not None)
|
|
codecs.lookup(t.encoding)
|
|
|
|
def test_encoding_errors_reading(self):
|
|
# (1) default
|
|
b = self.BytesIO(b"abc\n\xff\n")
|
|
t = self.TextIOWrapper(b, encoding="ascii")
|
|
self.assertRaises(UnicodeError, t.read)
|
|
# (2) explicit strict
|
|
b = self.BytesIO(b"abc\n\xff\n")
|
|
t = self.TextIOWrapper(b, encoding="ascii", errors="strict")
|
|
self.assertRaises(UnicodeError, t.read)
|
|
# (3) ignore
|
|
b = self.BytesIO(b"abc\n\xff\n")
|
|
t = self.TextIOWrapper(b, encoding="ascii", errors="ignore")
|
|
self.assertEqual(t.read(), "abc\n\n")
|
|
# (4) replace
|
|
b = self.BytesIO(b"abc\n\xff\n")
|
|
t = self.TextIOWrapper(b, encoding="ascii", errors="replace")
|
|
self.assertEqual(t.read(), "abc\n\ufffd\n")
|
|
|
|
def test_encoding_errors_writing(self):
|
|
# (1) default
|
|
b = self.BytesIO()
|
|
t = self.TextIOWrapper(b, encoding="ascii")
|
|
self.assertRaises(UnicodeError, t.write, "\xff")
|
|
# (2) explicit strict
|
|
b = self.BytesIO()
|
|
t = self.TextIOWrapper(b, encoding="ascii", errors="strict")
|
|
self.assertRaises(UnicodeError, t.write, "\xff")
|
|
# (3) ignore
|
|
b = self.BytesIO()
|
|
t = self.TextIOWrapper(b, encoding="ascii", errors="ignore",
|
|
newline="\n")
|
|
t.write("abc\xffdef\n")
|
|
t.flush()
|
|
self.assertEqual(b.getvalue(), b"abcdef\n")
|
|
# (4) replace
|
|
b = self.BytesIO()
|
|
t = self.TextIOWrapper(b, encoding="ascii", errors="replace",
|
|
newline="\n")
|
|
t.write("abc\xffdef\n")
|
|
t.flush()
|
|
self.assertEqual(b.getvalue(), b"abc?def\n")
|
|
|
|
def test_newlines(self):
|
|
input_lines = [ "unix\n", "windows\r\n", "os9\r", "last\n", "nonl" ]
|
|
|
|
tests = [
|
|
[ None, [ 'unix\n', 'windows\n', 'os9\n', 'last\n', 'nonl' ] ],
|
|
[ '', input_lines ],
|
|
[ '\n', [ "unix\n", "windows\r\n", "os9\rlast\n", "nonl" ] ],
|
|
[ '\r\n', [ "unix\nwindows\r\n", "os9\rlast\nnonl" ] ],
|
|
[ '\r', [ "unix\nwindows\r", "\nos9\r", "last\nnonl" ] ],
|
|
]
|
|
encodings = (
|
|
'utf-8', 'latin-1',
|
|
'utf-16', 'utf-16-le', 'utf-16-be',
|
|
'utf-32', 'utf-32-le', 'utf-32-be',
|
|
)
|
|
|
|
# Try a range of buffer sizes to test the case where \r is the last
|
|
# character in TextIOWrapper._pending_line.
|
|
for encoding in encodings:
|
|
# XXX: str.encode() should return bytes
|
|
data = bytes(''.join(input_lines).encode(encoding))
|
|
for do_reads in (False, True):
|
|
for bufsize in range(1, 10):
|
|
for newline, exp_lines in tests:
|
|
bufio = self.BufferedReader(self.BytesIO(data), bufsize)
|
|
textio = self.TextIOWrapper(bufio, newline=newline,
|
|
encoding=encoding)
|
|
if do_reads:
|
|
got_lines = []
|
|
while True:
|
|
c2 = textio.read(2)
|
|
if c2 == '':
|
|
break
|
|
self.assertEqual(len(c2), 2)
|
|
got_lines.append(c2 + textio.readline())
|
|
else:
|
|
got_lines = list(textio)
|
|
|
|
for got_line, exp_line in zip(got_lines, exp_lines):
|
|
self.assertEqual(got_line, exp_line)
|
|
self.assertEqual(len(got_lines), len(exp_lines))
|
|
|
|
def test_newlines_input(self):
|
|
testdata = b"AAA\nBB\x00B\nCCC\rDDD\rEEE\r\nFFF\r\nGGG"
|
|
normalized = testdata.replace(b"\r\n", b"\n").replace(b"\r", b"\n")
|
|
for newline, expected in [
|
|
(None, normalized.decode("ascii").splitlines(keepends=True)),
|
|
("", testdata.decode("ascii").splitlines(keepends=True)),
|
|
("\n", ["AAA\n", "BB\x00B\n", "CCC\rDDD\rEEE\r\n", "FFF\r\n", "GGG"]),
|
|
("\r\n", ["AAA\nBB\x00B\nCCC\rDDD\rEEE\r\n", "FFF\r\n", "GGG"]),
|
|
("\r", ["AAA\nBB\x00B\nCCC\r", "DDD\r", "EEE\r", "\nFFF\r", "\nGGG"]),
|
|
]:
|
|
buf = self.BytesIO(testdata)
|
|
txt = self.TextIOWrapper(buf, encoding="ascii", newline=newline)
|
|
self.assertEqual(txt.readlines(), expected)
|
|
txt.seek(0)
|
|
self.assertEqual(txt.read(), "".join(expected))
|
|
|
|
def test_newlines_output(self):
|
|
testdict = {
|
|
"": b"AAA\nBBB\nCCC\nX\rY\r\nZ",
|
|
"\n": b"AAA\nBBB\nCCC\nX\rY\r\nZ",
|
|
"\r": b"AAA\rBBB\rCCC\rX\rY\r\rZ",
|
|
"\r\n": b"AAA\r\nBBB\r\nCCC\r\nX\rY\r\r\nZ",
|
|
}
|
|
tests = [(None, testdict[os.linesep])] + sorted(testdict.items())
|
|
for newline, expected in tests:
|
|
buf = self.BytesIO()
|
|
txt = self.TextIOWrapper(buf, encoding="ascii", newline=newline)
|
|
txt.write("AAA\nB")
|
|
txt.write("BB\nCCC\n")
|
|
txt.write("X\rY\r\nZ")
|
|
txt.flush()
|
|
self.assertEqual(buf.closed, False)
|
|
self.assertEqual(buf.getvalue(), expected)
|
|
|
|
def test_destructor(self):
|
|
l = []
|
|
base = self.BytesIO
|
|
class MyBytesIO(base):
|
|
def close(self):
|
|
l.append(self.getvalue())
|
|
base.close(self)
|
|
b = MyBytesIO()
|
|
t = self.TextIOWrapper(b, encoding="ascii")
|
|
t.write("abc")
|
|
del t
|
|
support.gc_collect()
|
|
self.assertEqual([b"abc"], l)
|
|
|
|
def test_override_destructor(self):
|
|
record = []
|
|
class MyTextIO(self.TextIOWrapper):
|
|
def __del__(self):
|
|
record.append(1)
|
|
try:
|
|
f = super().__del__
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
f()
|
|
def close(self):
|
|
record.append(2)
|
|
super().close()
|
|
def flush(self):
|
|
record.append(3)
|
|
super().flush()
|
|
b = self.BytesIO()
|
|
t = MyTextIO(b, encoding="ascii")
|
|
del t
|
|
support.gc_collect()
|
|
self.assertEqual(record, [1, 2, 3])
|
|
|
|
def test_error_through_destructor(self):
|
|
# Test that the exception state is not modified by a destructor,
|
|
# even if close() fails.
|
|
rawio = self.CloseFailureIO()
|
|
def f():
|
|
self.TextIOWrapper(rawio).xyzzy
|
|
with support.captured_output("stderr") as s:
|
|
self.assertRaises(AttributeError, f)
|
|
s = s.getvalue().strip()
|
|
if s:
|
|
# The destructor *may* have printed an unraisable error, check it
|
|
self.assertEqual(len(s.splitlines()), 1)
|
|
self.assertTrue(s.startswith("Exception IOError: "), s)
|
|
self.assertTrue(s.endswith(" ignored"), s)
|
|
|
|
# Systematic tests of the text I/O API
|
|
|
|
def test_basic_io(self):
|
|
for chunksize in (1, 2, 3, 4, 5, 15, 16, 17, 31, 32, 33, 63, 64, 65):
|
|
for enc in "ascii", "latin-1", "utf-8" :# , "utf-16-be", "utf-16-le":
|
|
f = self.open(support.TESTFN, "w+", encoding=enc)
|
|
f._CHUNK_SIZE = chunksize
|
|
self.assertEqual(f.write("abc"), 3)
|
|
f.close()
|
|
f = self.open(support.TESTFN, "r+", encoding=enc)
|
|
f._CHUNK_SIZE = chunksize
|
|
self.assertEqual(f.tell(), 0)
|
|
self.assertEqual(f.read(), "abc")
|
|
cookie = f.tell()
|
|
self.assertEqual(f.seek(0), 0)
|
|
self.assertEqual(f.read(None), "abc")
|
|
f.seek(0)
|
|
self.assertEqual(f.read(2), "ab")
|
|
self.assertEqual(f.read(1), "c")
|
|
self.assertEqual(f.read(1), "")
|
|
self.assertEqual(f.read(), "")
|
|
self.assertEqual(f.tell(), cookie)
|
|
self.assertEqual(f.seek(0), 0)
|
|
self.assertEqual(f.seek(0, 2), cookie)
|
|
self.assertEqual(f.write("def"), 3)
|
|
self.assertEqual(f.seek(cookie), cookie)
|
|
self.assertEqual(f.read(), "def")
|
|
if enc.startswith("utf"):
|
|
self.multi_line_test(f, enc)
|
|
f.close()
|
|
|
|
def multi_line_test(self, f, enc):
|
|
f.seek(0)
|
|
f.truncate()
|
|
sample = "s\xff\u0fff\uffff"
|
|
wlines = []
|
|
for size in (0, 1, 2, 3, 4, 5, 30, 31, 32, 33, 62, 63, 64, 65, 1000):
|
|
chars = []
|
|
for i in range(size):
|
|
chars.append(sample[i % len(sample)])
|
|
line = "".join(chars) + "\n"
|
|
wlines.append((f.tell(), line))
|
|
f.write(line)
|
|
f.seek(0)
|
|
rlines = []
|
|
while True:
|
|
pos = f.tell()
|
|
line = f.readline()
|
|
if not line:
|
|
break
|
|
rlines.append((pos, line))
|
|
self.assertEqual(rlines, wlines)
|
|
|
|
def test_telling(self):
|
|
f = self.open(support.TESTFN, "w+", encoding="utf-8")
|
|
p0 = f.tell()
|
|
f.write("\xff\n")
|
|
p1 = f.tell()
|
|
f.write("\xff\n")
|
|
p2 = f.tell()
|
|
f.seek(0)
|
|
self.assertEqual(f.tell(), p0)
|
|
self.assertEqual(f.readline(), "\xff\n")
|
|
self.assertEqual(f.tell(), p1)
|
|
self.assertEqual(f.readline(), "\xff\n")
|
|
self.assertEqual(f.tell(), p2)
|
|
f.seek(0)
|
|
for line in f:
|
|
self.assertEqual(line, "\xff\n")
|
|
self.assertRaises(IOError, f.tell)
|
|
self.assertEqual(f.tell(), p2)
|
|
f.close()
|
|
|
|
def test_seeking(self):
|
|
chunk_size = _default_chunk_size()
|
|
prefix_size = chunk_size - 2
|
|
u_prefix = "a" * prefix_size
|
|
prefix = bytes(u_prefix.encode("utf-8"))
|
|
self.assertEqual(len(u_prefix), len(prefix))
|
|
u_suffix = "\u8888\n"
|
|
suffix = bytes(u_suffix.encode("utf-8"))
|
|
line = prefix + suffix
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
f.write(line*2)
|
|
with self.open(support.TESTFN, "r", encoding="utf-8") as f:
|
|
s = f.read(prefix_size)
|
|
self.assertEqual(s, str(prefix, "ascii"))
|
|
self.assertEqual(f.tell(), prefix_size)
|
|
self.assertEqual(f.readline(), u_suffix)
|
|
|
|
def test_seeking_too(self):
|
|
# Regression test for a specific bug
|
|
data = b'\xe0\xbf\xbf\n'
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
f.write(data)
|
|
with self.open(support.TESTFN, "r", encoding="utf-8") as f:
|
|
f._CHUNK_SIZE # Just test that it exists
|
|
f._CHUNK_SIZE = 2
|
|
f.readline()
|
|
f.tell()
|
|
|
|
def test_seek_and_tell(self):
|
|
#Test seek/tell using the StatefulIncrementalDecoder.
|
|
# Make test faster by doing smaller seeks
|
|
CHUNK_SIZE = 128
|
|
|
|
def test_seek_and_tell_with_data(data, min_pos=0):
|
|
"""Tell/seek to various points within a data stream and ensure
|
|
that the decoded data returned by read() is consistent."""
|
|
f = self.open(support.TESTFN, 'wb')
|
|
f.write(data)
|
|
f.close()
|
|
f = self.open(support.TESTFN, encoding='test_decoder')
|
|
f._CHUNK_SIZE = CHUNK_SIZE
|
|
decoded = f.read()
|
|
f.close()
|
|
|
|
for i in range(min_pos, len(decoded) + 1): # seek positions
|
|
for j in [1, 5, len(decoded) - i]: # read lengths
|
|
f = self.open(support.TESTFN, encoding='test_decoder')
|
|
self.assertEqual(f.read(i), decoded[:i])
|
|
cookie = f.tell()
|
|
self.assertEqual(f.read(j), decoded[i:i + j])
|
|
f.seek(cookie)
|
|
self.assertEqual(f.read(), decoded[i:])
|
|
f.close()
|
|
|
|
# Enable the test decoder.
|
|
StatefulIncrementalDecoder.codecEnabled = 1
|
|
|
|
# Run the tests.
|
|
try:
|
|
# Try each test case.
|
|
for input, _, _ in StatefulIncrementalDecoderTest.test_cases:
|
|
test_seek_and_tell_with_data(input)
|
|
|
|
# Position each test case so that it crosses a chunk boundary.
|
|
for input, _, _ in StatefulIncrementalDecoderTest.test_cases:
|
|
offset = CHUNK_SIZE - len(input)//2
|
|
prefix = b'.'*offset
|
|
# Don't bother seeking into the prefix (takes too long).
|
|
min_pos = offset*2
|
|
test_seek_and_tell_with_data(prefix + input, min_pos)
|
|
|
|
# Ensure our test decoder won't interfere with subsequent tests.
|
|
finally:
|
|
StatefulIncrementalDecoder.codecEnabled = 0
|
|
|
|
def test_encoded_writes(self):
|
|
data = "1234567890"
|
|
tests = ("utf-16",
|
|
"utf-16-le",
|
|
"utf-16-be",
|
|
"utf-32",
|
|
"utf-32-le",
|
|
"utf-32-be")
|
|
for encoding in tests:
|
|
buf = self.BytesIO()
|
|
f = self.TextIOWrapper(buf, encoding=encoding)
|
|
# Check if the BOM is written only once (see issue1753).
|
|
f.write(data)
|
|
f.write(data)
|
|
f.seek(0)
|
|
self.assertEqual(f.read(), data * 2)
|
|
f.seek(0)
|
|
self.assertEqual(f.read(), data * 2)
|
|
self.assertEqual(buf.getvalue(), (data * 2).encode(encoding))
|
|
|
|
def test_unreadable(self):
|
|
class UnReadable(self.BytesIO):
|
|
def readable(self):
|
|
return False
|
|
txt = self.TextIOWrapper(UnReadable())
|
|
self.assertRaises(IOError, txt.read)
|
|
|
|
def test_read_one_by_one(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(b"AA\r\nBB"))
|
|
reads = ""
|
|
while True:
|
|
c = txt.read(1)
|
|
if not c:
|
|
break
|
|
reads += c
|
|
self.assertEqual(reads, "AA\nBB")
|
|
|
|
def test_readlines(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(b"AA\nBB\nCC"))
|
|
self.assertEqual(txt.readlines(), ["AA\n", "BB\n", "CC"])
|
|
txt.seek(0)
|
|
self.assertEqual(txt.readlines(None), ["AA\n", "BB\n", "CC"])
|
|
txt.seek(0)
|
|
self.assertEqual(txt.readlines(5), ["AA\n", "BB\n"])
|
|
|
|
# read in amounts equal to TextIOWrapper._CHUNK_SIZE which is 128.
|
|
def test_read_by_chunk(self):
|
|
# make sure "\r\n" straddles 128 char boundary.
|
|
txt = self.TextIOWrapper(self.BytesIO(b"A" * 127 + b"\r\nB"))
|
|
reads = ""
|
|
while True:
|
|
c = txt.read(128)
|
|
if not c:
|
|
break
|
|
reads += c
|
|
self.assertEqual(reads, "A"*127+"\nB")
|
|
|
|
def test_issue1395_1(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(self.testdata), encoding="ascii")
|
|
|
|
# read one char at a time
|
|
reads = ""
|
|
while True:
|
|
c = txt.read(1)
|
|
if not c:
|
|
break
|
|
reads += c
|
|
self.assertEqual(reads, self.normalized)
|
|
|
|
def test_issue1395_2(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(self.testdata), encoding="ascii")
|
|
txt._CHUNK_SIZE = 4
|
|
|
|
reads = ""
|
|
while True:
|
|
c = txt.read(4)
|
|
if not c:
|
|
break
|
|
reads += c
|
|
self.assertEqual(reads, self.normalized)
|
|
|
|
def test_issue1395_3(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(self.testdata), encoding="ascii")
|
|
txt._CHUNK_SIZE = 4
|
|
|
|
reads = txt.read(4)
|
|
reads += txt.read(4)
|
|
reads += txt.readline()
|
|
reads += txt.readline()
|
|
reads += txt.readline()
|
|
self.assertEqual(reads, self.normalized)
|
|
|
|
def test_issue1395_4(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(self.testdata), encoding="ascii")
|
|
txt._CHUNK_SIZE = 4
|
|
|
|
reads = txt.read(4)
|
|
reads += txt.read()
|
|
self.assertEqual(reads, self.normalized)
|
|
|
|
def test_issue1395_5(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(self.testdata), encoding="ascii")
|
|
txt._CHUNK_SIZE = 4
|
|
|
|
reads = txt.read(4)
|
|
pos = txt.tell()
|
|
txt.seek(0)
|
|
txt.seek(pos)
|
|
self.assertEqual(txt.read(4), "BBB\n")
|
|
|
|
def test_issue2282(self):
|
|
buffer = self.BytesIO(self.testdata)
|
|
txt = self.TextIOWrapper(buffer, encoding="ascii")
|
|
|
|
self.assertEqual(buffer.seekable(), txt.seekable())
|
|
|
|
def test_append_bom(self):
|
|
# The BOM is not written again when appending to a non-empty file
|
|
filename = support.TESTFN
|
|
for charset in ('utf-8-sig', 'utf-16', 'utf-32'):
|
|
with self.open(filename, 'w', encoding=charset) as f:
|
|
f.write('aaa')
|
|
pos = f.tell()
|
|
with self.open(filename, 'rb') as f:
|
|
self.assertEqual(f.read(), 'aaa'.encode(charset))
|
|
|
|
with self.open(filename, 'a', encoding=charset) as f:
|
|
f.write('xxx')
|
|
with self.open(filename, 'rb') as f:
|
|
self.assertEqual(f.read(), 'aaaxxx'.encode(charset))
|
|
|
|
def test_seek_bom(self):
|
|
# Same test, but when seeking manually
|
|
filename = support.TESTFN
|
|
for charset in ('utf-8-sig', 'utf-16', 'utf-32'):
|
|
with self.open(filename, 'w', encoding=charset) as f:
|
|
f.write('aaa')
|
|
pos = f.tell()
|
|
with self.open(filename, 'r+', encoding=charset) as f:
|
|
f.seek(pos)
|
|
f.write('zzz')
|
|
f.seek(0)
|
|
f.write('bbb')
|
|
with self.open(filename, 'rb') as f:
|
|
self.assertEqual(f.read(), 'bbbzzz'.encode(charset))
|
|
|
|
def test_errors_property(self):
|
|
with self.open(support.TESTFN, "w") as f:
|
|
self.assertEqual(f.errors, "strict")
|
|
with self.open(support.TESTFN, "w", errors="replace") as f:
|
|
self.assertEqual(f.errors, "replace")
|
|
|
|
@support.no_tracing
|
|
@unittest.skipUnless(threading, 'Threading required for this test.')
|
|
def test_threads_write(self):
|
|
# Issue6750: concurrent writes could duplicate data
|
|
event = threading.Event()
|
|
with self.open(support.TESTFN, "w", buffering=1) as f:
|
|
def run(n):
|
|
text = "Thread%03d\n" % n
|
|
event.wait()
|
|
f.write(text)
|
|
threads = [threading.Thread(target=lambda n=x: run(n))
|
|
for x in range(20)]
|
|
for t in threads:
|
|
t.start()
|
|
time.sleep(0.02)
|
|
event.set()
|
|
for t in threads:
|
|
t.join()
|
|
with self.open(support.TESTFN) as f:
|
|
content = f.read()
|
|
for n in range(20):
|
|
self.assertEqual(content.count("Thread%03d\n" % n), 1)
|
|
|
|
def test_flush_error_on_close(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(self.testdata), encoding="ascii")
|
|
def bad_flush():
|
|
raise IOError()
|
|
txt.flush = bad_flush
|
|
self.assertRaises(IOError, txt.close) # exception not swallowed
|
|
|
|
def test_multi_close(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(self.testdata), encoding="ascii")
|
|
txt.close()
|
|
txt.close()
|
|
txt.close()
|
|
self.assertRaises(ValueError, txt.flush)
|
|
|
|
def test_unseekable(self):
|
|
txt = self.TextIOWrapper(self.MockUnseekableIO(self.testdata))
|
|
self.assertRaises(self.UnsupportedOperation, txt.tell)
|
|
self.assertRaises(self.UnsupportedOperation, txt.seek, 0)
|
|
|
|
def test_readonly_attributes(self):
|
|
txt = self.TextIOWrapper(self.BytesIO(self.testdata), encoding="ascii")
|
|
buf = self.BytesIO(self.testdata)
|
|
with self.assertRaises(AttributeError):
|
|
txt.buffer = buf
|
|
|
|
def test_rawio(self):
|
|
# Issue #12591: TextIOWrapper must work with raw I/O objects, so
|
|
# that subprocess.Popen() can have the required unbuffered
|
|
# semantics with universal_newlines=True.
|
|
raw = self.MockRawIO([b'abc', b'def', b'ghi\njkl\nopq\n'])
|
|
txt = self.TextIOWrapper(raw, encoding='ascii', newline='\n')
|
|
# Reads
|
|
self.assertEqual(txt.read(4), 'abcd')
|
|
self.assertEqual(txt.readline(), 'efghi\n')
|
|
self.assertEqual(list(txt), ['jkl\n', 'opq\n'])
|
|
|
|
def test_rawio_write_through(self):
|
|
# Issue #12591: with write_through=True, writes don't need a flush
|
|
raw = self.MockRawIO([b'abc', b'def', b'ghi\njkl\nopq\n'])
|
|
txt = self.TextIOWrapper(raw, encoding='ascii', newline='\n',
|
|
write_through=True)
|
|
txt.write('1')
|
|
txt.write('23\n4')
|
|
txt.write('5')
|
|
self.assertEqual(b''.join(raw._write_stack), b'123\n45')
|
|
|
|
class CTextIOWrapperTest(TextIOWrapperTest):
|
|
|
|
def test_initialization(self):
|
|
r = self.BytesIO(b"\xc3\xa9\n\n")
|
|
b = self.BufferedReader(r, 1000)
|
|
t = self.TextIOWrapper(b)
|
|
self.assertRaises(TypeError, t.__init__, b, newline=42)
|
|
self.assertRaises(ValueError, t.read)
|
|
self.assertRaises(ValueError, t.__init__, b, newline='xyzzy')
|
|
self.assertRaises(ValueError, t.read)
|
|
|
|
def test_garbage_collection(self):
|
|
# C TextIOWrapper objects are collected, and collecting them flushes
|
|
# all data to disk.
|
|
# The Python version has __del__, so it ends in gc.garbage instead.
|
|
rawio = io.FileIO(support.TESTFN, "wb")
|
|
b = self.BufferedWriter(rawio)
|
|
t = self.TextIOWrapper(b, encoding="ascii")
|
|
t.write("456def")
|
|
t.x = t
|
|
wr = weakref.ref(t)
|
|
del t
|
|
support.gc_collect()
|
|
self.assertTrue(wr() is None, wr)
|
|
with self.open(support.TESTFN, "rb") as f:
|
|
self.assertEqual(f.read(), b"456def")
|
|
|
|
def test_rwpair_cleared_before_textio(self):
|
|
# Issue 13070: TextIOWrapper's finalization would crash when called
|
|
# after the reference to the underlying BufferedRWPair's writer got
|
|
# cleared by the GC.
|
|
for i in range(1000):
|
|
b1 = self.BufferedRWPair(self.MockRawIO(), self.MockRawIO())
|
|
t1 = self.TextIOWrapper(b1, encoding="ascii")
|
|
b2 = self.BufferedRWPair(self.MockRawIO(), self.MockRawIO())
|
|
t2 = self.TextIOWrapper(b2, encoding="ascii")
|
|
# circular references
|
|
t1.buddy = t2
|
|
t2.buddy = t1
|
|
support.gc_collect()
|
|
|
|
|
|
class PyTextIOWrapperTest(TextIOWrapperTest):
|
|
pass
|
|
|
|
|
|
class IncrementalNewlineDecoderTest(unittest.TestCase):
|
|
|
|
def check_newline_decoding_utf8(self, decoder):
|
|
# UTF-8 specific tests for a newline decoder
|
|
def _check_decode(b, s, **kwargs):
|
|
# We exercise getstate() / setstate() as well as decode()
|
|
state = decoder.getstate()
|
|
self.assertEqual(decoder.decode(b, **kwargs), s)
|
|
decoder.setstate(state)
|
|
self.assertEqual(decoder.decode(b, **kwargs), s)
|
|
|
|
_check_decode(b'\xe8\xa2\x88', "\u8888")
|
|
|
|
_check_decode(b'\xe8', "")
|
|
_check_decode(b'\xa2', "")
|
|
_check_decode(b'\x88', "\u8888")
|
|
|
|
_check_decode(b'\xe8', "")
|
|
_check_decode(b'\xa2', "")
|
|
_check_decode(b'\x88', "\u8888")
|
|
|
|
_check_decode(b'\xe8', "")
|
|
self.assertRaises(UnicodeDecodeError, decoder.decode, b'', final=True)
|
|
|
|
decoder.reset()
|
|
_check_decode(b'\n', "\n")
|
|
_check_decode(b'\r', "")
|
|
_check_decode(b'', "\n", final=True)
|
|
_check_decode(b'\r', "\n", final=True)
|
|
|
|
_check_decode(b'\r', "")
|
|
_check_decode(b'a', "\na")
|
|
|
|
_check_decode(b'\r\r\n', "\n\n")
|
|
_check_decode(b'\r', "")
|
|
_check_decode(b'\r', "\n")
|
|
_check_decode(b'\na', "\na")
|
|
|
|
_check_decode(b'\xe8\xa2\x88\r\n', "\u8888\n")
|
|
_check_decode(b'\xe8\xa2\x88', "\u8888")
|
|
_check_decode(b'\n', "\n")
|
|
_check_decode(b'\xe8\xa2\x88\r', "\u8888")
|
|
_check_decode(b'\n', "\n")
|
|
|
|
def check_newline_decoding(self, decoder, encoding):
|
|
result = []
|
|
if encoding is not None:
|
|
encoder = codecs.getincrementalencoder(encoding)()
|
|
def _decode_bytewise(s):
|
|
# Decode one byte at a time
|
|
for b in encoder.encode(s):
|
|
result.append(decoder.decode(bytes([b])))
|
|
else:
|
|
encoder = None
|
|
def _decode_bytewise(s):
|
|
# Decode one char at a time
|
|
for c in s:
|
|
result.append(decoder.decode(c))
|
|
self.assertEqual(decoder.newlines, None)
|
|
_decode_bytewise("abc\n\r")
|
|
self.assertEqual(decoder.newlines, '\n')
|
|
_decode_bytewise("\nabc")
|
|
self.assertEqual(decoder.newlines, ('\n', '\r\n'))
|
|
_decode_bytewise("abc\r")
|
|
self.assertEqual(decoder.newlines, ('\n', '\r\n'))
|
|
_decode_bytewise("abc")
|
|
self.assertEqual(decoder.newlines, ('\r', '\n', '\r\n'))
|
|
_decode_bytewise("abc\r")
|
|
self.assertEqual("".join(result), "abc\n\nabcabc\nabcabc")
|
|
decoder.reset()
|
|
input = "abc"
|
|
if encoder is not None:
|
|
encoder.reset()
|
|
input = encoder.encode(input)
|
|
self.assertEqual(decoder.decode(input), "abc")
|
|
self.assertEqual(decoder.newlines, None)
|
|
|
|
def test_newline_decoder(self):
|
|
encodings = (
|
|
# None meaning the IncrementalNewlineDecoder takes unicode input
|
|
# rather than bytes input
|
|
None, 'utf-8', 'latin-1',
|
|
'utf-16', 'utf-16-le', 'utf-16-be',
|
|
'utf-32', 'utf-32-le', 'utf-32-be',
|
|
)
|
|
for enc in encodings:
|
|
decoder = enc and codecs.getincrementaldecoder(enc)()
|
|
decoder = self.IncrementalNewlineDecoder(decoder, translate=True)
|
|
self.check_newline_decoding(decoder, enc)
|
|
decoder = codecs.getincrementaldecoder("utf-8")()
|
|
decoder = self.IncrementalNewlineDecoder(decoder, translate=True)
|
|
self.check_newline_decoding_utf8(decoder)
|
|
|
|
def test_newline_bytes(self):
|
|
# Issue 5433: Excessive optimization in IncrementalNewlineDecoder
|
|
def _check(dec):
|
|
self.assertEqual(dec.newlines, None)
|
|
self.assertEqual(dec.decode("\u0D00"), "\u0D00")
|
|
self.assertEqual(dec.newlines, None)
|
|
self.assertEqual(dec.decode("\u0A00"), "\u0A00")
|
|
self.assertEqual(dec.newlines, None)
|
|
dec = self.IncrementalNewlineDecoder(None, translate=False)
|
|
_check(dec)
|
|
dec = self.IncrementalNewlineDecoder(None, translate=True)
|
|
_check(dec)
|
|
|
|
class CIncrementalNewlineDecoderTest(IncrementalNewlineDecoderTest):
|
|
pass
|
|
|
|
class PyIncrementalNewlineDecoderTest(IncrementalNewlineDecoderTest):
|
|
pass
|
|
|
|
|
|
# XXX Tests for open()
|
|
|
|
class MiscIOTest(unittest.TestCase):
|
|
|
|
def tearDown(self):
|
|
support.unlink(support.TESTFN)
|
|
|
|
def test___all__(self):
|
|
for name in self.io.__all__:
|
|
obj = getattr(self.io, name, None)
|
|
self.assertTrue(obj is not None, name)
|
|
if name == "open":
|
|
continue
|
|
elif "error" in name.lower() or name == "UnsupportedOperation":
|
|
self.assertTrue(issubclass(obj, Exception), name)
|
|
elif not name.startswith("SEEK_"):
|
|
self.assertTrue(issubclass(obj, self.IOBase))
|
|
|
|
def test_attributes(self):
|
|
f = self.open(support.TESTFN, "wb", buffering=0)
|
|
self.assertEqual(f.mode, "wb")
|
|
f.close()
|
|
|
|
f = self.open(support.TESTFN, "U")
|
|
self.assertEqual(f.name, support.TESTFN)
|
|
self.assertEqual(f.buffer.name, support.TESTFN)
|
|
self.assertEqual(f.buffer.raw.name, support.TESTFN)
|
|
self.assertEqual(f.mode, "U")
|
|
self.assertEqual(f.buffer.mode, "rb")
|
|
self.assertEqual(f.buffer.raw.mode, "rb")
|
|
f.close()
|
|
|
|
f = self.open(support.TESTFN, "w+")
|
|
self.assertEqual(f.mode, "w+")
|
|
self.assertEqual(f.buffer.mode, "rb+") # Does it really matter?
|
|
self.assertEqual(f.buffer.raw.mode, "rb+")
|
|
|
|
g = self.open(f.fileno(), "wb", closefd=False)
|
|
self.assertEqual(g.mode, "wb")
|
|
self.assertEqual(g.raw.mode, "wb")
|
|
self.assertEqual(g.name, f.fileno())
|
|
self.assertEqual(g.raw.name, f.fileno())
|
|
f.close()
|
|
g.close()
|
|
|
|
def test_io_after_close(self):
|
|
for kwargs in [
|
|
{"mode": "w"},
|
|
{"mode": "wb"},
|
|
{"mode": "w", "buffering": 1},
|
|
{"mode": "w", "buffering": 2},
|
|
{"mode": "wb", "buffering": 0},
|
|
{"mode": "r"},
|
|
{"mode": "rb"},
|
|
{"mode": "r", "buffering": 1},
|
|
{"mode": "r", "buffering": 2},
|
|
{"mode": "rb", "buffering": 0},
|
|
{"mode": "w+"},
|
|
{"mode": "w+b"},
|
|
{"mode": "w+", "buffering": 1},
|
|
{"mode": "w+", "buffering": 2},
|
|
{"mode": "w+b", "buffering": 0},
|
|
]:
|
|
f = self.open(support.TESTFN, **kwargs)
|
|
f.close()
|
|
self.assertRaises(ValueError, f.flush)
|
|
self.assertRaises(ValueError, f.fileno)
|
|
self.assertRaises(ValueError, f.isatty)
|
|
self.assertRaises(ValueError, f.__iter__)
|
|
if hasattr(f, "peek"):
|
|
self.assertRaises(ValueError, f.peek, 1)
|
|
self.assertRaises(ValueError, f.read)
|
|
if hasattr(f, "read1"):
|
|
self.assertRaises(ValueError, f.read1, 1024)
|
|
if hasattr(f, "readall"):
|
|
self.assertRaises(ValueError, f.readall)
|
|
if hasattr(f, "readinto"):
|
|
self.assertRaises(ValueError, f.readinto, bytearray(1024))
|
|
self.assertRaises(ValueError, f.readline)
|
|
self.assertRaises(ValueError, f.readlines)
|
|
self.assertRaises(ValueError, f.seek, 0)
|
|
self.assertRaises(ValueError, f.tell)
|
|
self.assertRaises(ValueError, f.truncate)
|
|
self.assertRaises(ValueError, f.write,
|
|
b"" if "b" in kwargs['mode'] else "")
|
|
self.assertRaises(ValueError, f.writelines, [])
|
|
self.assertRaises(ValueError, next, f)
|
|
|
|
def test_blockingioerror(self):
|
|
# Various BlockingIOError issues
|
|
class C(str):
|
|
pass
|
|
c = C("")
|
|
b = self.BlockingIOError(1, c)
|
|
c.b = b
|
|
b.c = c
|
|
wr = weakref.ref(c)
|
|
del c, b
|
|
support.gc_collect()
|
|
self.assertTrue(wr() is None, wr)
|
|
|
|
def test_abcs(self):
|
|
# Test the visible base classes are ABCs.
|
|
self.assertIsInstance(self.IOBase, abc.ABCMeta)
|
|
self.assertIsInstance(self.RawIOBase, abc.ABCMeta)
|
|
self.assertIsInstance(self.BufferedIOBase, abc.ABCMeta)
|
|
self.assertIsInstance(self.TextIOBase, abc.ABCMeta)
|
|
|
|
def _check_abc_inheritance(self, abcmodule):
|
|
with self.open(support.TESTFN, "wb", buffering=0) as f:
|
|
self.assertIsInstance(f, abcmodule.IOBase)
|
|
self.assertIsInstance(f, abcmodule.RawIOBase)
|
|
self.assertNotIsInstance(f, abcmodule.BufferedIOBase)
|
|
self.assertNotIsInstance(f, abcmodule.TextIOBase)
|
|
with self.open(support.TESTFN, "wb") as f:
|
|
self.assertIsInstance(f, abcmodule.IOBase)
|
|
self.assertNotIsInstance(f, abcmodule.RawIOBase)
|
|
self.assertIsInstance(f, abcmodule.BufferedIOBase)
|
|
self.assertNotIsInstance(f, abcmodule.TextIOBase)
|
|
with self.open(support.TESTFN, "w") as f:
|
|
self.assertIsInstance(f, abcmodule.IOBase)
|
|
self.assertNotIsInstance(f, abcmodule.RawIOBase)
|
|
self.assertNotIsInstance(f, abcmodule.BufferedIOBase)
|
|
self.assertIsInstance(f, abcmodule.TextIOBase)
|
|
|
|
def test_abc_inheritance(self):
|
|
# Test implementations inherit from their respective ABCs
|
|
self._check_abc_inheritance(self)
|
|
|
|
def test_abc_inheritance_official(self):
|
|
# Test implementations inherit from the official ABCs of the
|
|
# baseline "io" module.
|
|
self._check_abc_inheritance(io)
|
|
|
|
def _check_warn_on_dealloc(self, *args, **kwargs):
|
|
f = open(*args, **kwargs)
|
|
r = repr(f)
|
|
with self.assertWarns(ResourceWarning) as cm:
|
|
f = None
|
|
support.gc_collect()
|
|
self.assertIn(r, str(cm.warning.args[0]))
|
|
|
|
def test_warn_on_dealloc(self):
|
|
self._check_warn_on_dealloc(support.TESTFN, "wb", buffering=0)
|
|
self._check_warn_on_dealloc(support.TESTFN, "wb")
|
|
self._check_warn_on_dealloc(support.TESTFN, "w")
|
|
|
|
def _check_warn_on_dealloc_fd(self, *args, **kwargs):
|
|
fds = []
|
|
def cleanup_fds():
|
|
for fd in fds:
|
|
try:
|
|
os.close(fd)
|
|
except EnvironmentError as e:
|
|
if e.errno != errno.EBADF:
|
|
raise
|
|
self.addCleanup(cleanup_fds)
|
|
r, w = os.pipe()
|
|
fds += r, w
|
|
self._check_warn_on_dealloc(r, *args, **kwargs)
|
|
# When using closefd=False, there's no warning
|
|
r, w = os.pipe()
|
|
fds += r, w
|
|
with warnings.catch_warnings(record=True) as recorded:
|
|
open(r, *args, closefd=False, **kwargs)
|
|
support.gc_collect()
|
|
self.assertEqual(recorded, [])
|
|
|
|
def test_warn_on_dealloc_fd(self):
|
|
self._check_warn_on_dealloc_fd("rb", buffering=0)
|
|
self._check_warn_on_dealloc_fd("rb")
|
|
self._check_warn_on_dealloc_fd("r")
|
|
|
|
|
|
def test_pickling(self):
|
|
# Pickling file objects is forbidden
|
|
for kwargs in [
|
|
{"mode": "w"},
|
|
{"mode": "wb"},
|
|
{"mode": "wb", "buffering": 0},
|
|
{"mode": "r"},
|
|
{"mode": "rb"},
|
|
{"mode": "rb", "buffering": 0},
|
|
{"mode": "w+"},
|
|
{"mode": "w+b"},
|
|
{"mode": "w+b", "buffering": 0},
|
|
]:
|
|
for protocol in range(pickle.HIGHEST_PROTOCOL + 1):
|
|
with self.open(support.TESTFN, **kwargs) as f:
|
|
self.assertRaises(TypeError, pickle.dumps, f, protocol)
|
|
|
|
@unittest.skipUnless(fcntl, 'fcntl required for this test')
|
|
def test_nonblock_pipe_write_bigbuf(self):
|
|
self._test_nonblock_pipe_write(16*1024)
|
|
|
|
@unittest.skipUnless(fcntl, 'fcntl required for this test')
|
|
def test_nonblock_pipe_write_smallbuf(self):
|
|
self._test_nonblock_pipe_write(1024)
|
|
|
|
def _set_non_blocking(self, fd):
|
|
flags = fcntl.fcntl(fd, fcntl.F_GETFL)
|
|
self.assertNotEqual(flags, -1)
|
|
res = fcntl.fcntl(fd, fcntl.F_SETFL, flags | os.O_NONBLOCK)
|
|
self.assertEqual(res, 0)
|
|
|
|
def _test_nonblock_pipe_write(self, bufsize):
|
|
sent = []
|
|
received = []
|
|
r, w = os.pipe()
|
|
self._set_non_blocking(r)
|
|
self._set_non_blocking(w)
|
|
|
|
# To exercise all code paths in the C implementation we need
|
|
# to play with buffer sizes. For instance, if we choose a
|
|
# buffer size less than or equal to _PIPE_BUF (4096 on Linux)
|
|
# then we will never get a partial write of the buffer.
|
|
rf = self.open(r, mode='rb', closefd=True, buffering=bufsize)
|
|
wf = self.open(w, mode='wb', closefd=True, buffering=bufsize)
|
|
|
|
with rf, wf:
|
|
for N in 9999, 73, 7574:
|
|
try:
|
|
i = 0
|
|
while True:
|
|
msg = bytes([i % 26 + 97]) * N
|
|
sent.append(msg)
|
|
wf.write(msg)
|
|
i += 1
|
|
|
|
except self.BlockingIOError as e:
|
|
self.assertEqual(e.args[0], errno.EAGAIN)
|
|
self.assertEqual(e.args[2], e.characters_written)
|
|
sent[-1] = sent[-1][:e.characters_written]
|
|
received.append(rf.read())
|
|
msg = b'BLOCKED'
|
|
wf.write(msg)
|
|
sent.append(msg)
|
|
|
|
while True:
|
|
try:
|
|
wf.flush()
|
|
break
|
|
except self.BlockingIOError as e:
|
|
self.assertEqual(e.args[0], errno.EAGAIN)
|
|
self.assertEqual(e.args[2], e.characters_written)
|
|
self.assertEqual(e.characters_written, 0)
|
|
received.append(rf.read())
|
|
|
|
received += iter(rf.read, None)
|
|
|
|
sent, received = b''.join(sent), b''.join(received)
|
|
self.assertTrue(sent == received)
|
|
self.assertTrue(wf.closed)
|
|
self.assertTrue(rf.closed)
|
|
|
|
def test_create_fail(self):
|
|
# 'x' mode fails if file is existing
|
|
with self.open(support.TESTFN, 'w'):
|
|
pass
|
|
self.assertRaises(FileExistsError, self.open, support.TESTFN, 'x')
|
|
|
|
def test_create_writes(self):
|
|
# 'x' mode opens for writing
|
|
with self.open(support.TESTFN, 'xb') as f:
|
|
f.write(b"spam")
|
|
with self.open(support.TESTFN, 'rb') as f:
|
|
self.assertEqual(b"spam", f.read())
|
|
|
|
class CMiscIOTest(MiscIOTest):
|
|
io = io
|
|
|
|
class PyMiscIOTest(MiscIOTest):
|
|
io = pyio
|
|
|
|
|
|
@unittest.skipIf(os.name == 'nt', 'POSIX signals required for this test.')
|
|
class SignalsTest(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.oldalrm = signal.signal(signal.SIGALRM, self.alarm_interrupt)
|
|
|
|
def tearDown(self):
|
|
signal.signal(signal.SIGALRM, self.oldalrm)
|
|
|
|
def alarm_interrupt(self, sig, frame):
|
|
1/0
|
|
|
|
@unittest.skipUnless(threading, 'Threading required for this test.')
|
|
def check_interrupted_write(self, item, bytes, **fdopen_kwargs):
|
|
"""Check that a partial write, when it gets interrupted, properly
|
|
invokes the signal handler, and bubbles up the exception raised
|
|
in the latter."""
|
|
read_results = []
|
|
def _read():
|
|
if hasattr(signal, 'pthread_sigmask'):
|
|
signal.pthread_sigmask(signal.SIG_BLOCK, [signal.SIGALRM])
|
|
s = os.read(r, 1)
|
|
read_results.append(s)
|
|
t = threading.Thread(target=_read)
|
|
t.daemon = True
|
|
r, w = os.pipe()
|
|
fdopen_kwargs["closefd"] = False
|
|
try:
|
|
wio = self.io.open(w, **fdopen_kwargs)
|
|
t.start()
|
|
signal.alarm(1)
|
|
# Fill the pipe enough that the write will be blocking.
|
|
# It will be interrupted by the timer armed above. Since the
|
|
# other thread has read one byte, the low-level write will
|
|
# return with a successful (partial) result rather than an EINTR.
|
|
# The buffered IO layer must check for pending signal
|
|
# handlers, which in this case will invoke alarm_interrupt().
|
|
self.assertRaises(ZeroDivisionError,
|
|
wio.write, item * (support.PIPE_MAX_SIZE // len(item)))
|
|
t.join()
|
|
# We got one byte, get another one and check that it isn't a
|
|
# repeat of the first one.
|
|
read_results.append(os.read(r, 1))
|
|
self.assertEqual(read_results, [bytes[0:1], bytes[1:2]])
|
|
finally:
|
|
os.close(w)
|
|
os.close(r)
|
|
# This is deliberate. If we didn't close the file descriptor
|
|
# before closing wio, wio would try to flush its internal
|
|
# buffer, and block again.
|
|
try:
|
|
wio.close()
|
|
except IOError as e:
|
|
if e.errno != errno.EBADF:
|
|
raise
|
|
|
|
def test_interrupted_write_unbuffered(self):
|
|
self.check_interrupted_write(b"xy", b"xy", mode="wb", buffering=0)
|
|
|
|
def test_interrupted_write_buffered(self):
|
|
self.check_interrupted_write(b"xy", b"xy", mode="wb")
|
|
|
|
def test_interrupted_write_text(self):
|
|
self.check_interrupted_write("xy", b"xy", mode="w", encoding="ascii")
|
|
|
|
@support.no_tracing
|
|
def check_reentrant_write(self, data, **fdopen_kwargs):
|
|
def on_alarm(*args):
|
|
# Will be called reentrantly from the same thread
|
|
wio.write(data)
|
|
1/0
|
|
signal.signal(signal.SIGALRM, on_alarm)
|
|
r, w = os.pipe()
|
|
wio = self.io.open(w, **fdopen_kwargs)
|
|
try:
|
|
signal.alarm(1)
|
|
# Either the reentrant call to wio.write() fails with RuntimeError,
|
|
# or the signal handler raises ZeroDivisionError.
|
|
with self.assertRaises((ZeroDivisionError, RuntimeError)) as cm:
|
|
while 1:
|
|
for i in range(100):
|
|
wio.write(data)
|
|
wio.flush()
|
|
# Make sure the buffer doesn't fill up and block further writes
|
|
os.read(r, len(data) * 100)
|
|
exc = cm.exception
|
|
if isinstance(exc, RuntimeError):
|
|
self.assertTrue(str(exc).startswith("reentrant call"), str(exc))
|
|
finally:
|
|
wio.close()
|
|
os.close(r)
|
|
|
|
def test_reentrant_write_buffered(self):
|
|
self.check_reentrant_write(b"xy", mode="wb")
|
|
|
|
def test_reentrant_write_text(self):
|
|
self.check_reentrant_write("xy", mode="w", encoding="ascii")
|
|
|
|
def check_interrupted_read_retry(self, decode, **fdopen_kwargs):
|
|
"""Check that a buffered read, when it gets interrupted (either
|
|
returning a partial result or EINTR), properly invokes the signal
|
|
handler and retries if the latter returned successfully."""
|
|
r, w = os.pipe()
|
|
fdopen_kwargs["closefd"] = False
|
|
def alarm_handler(sig, frame):
|
|
os.write(w, b"bar")
|
|
signal.signal(signal.SIGALRM, alarm_handler)
|
|
try:
|
|
rio = self.io.open(r, **fdopen_kwargs)
|
|
os.write(w, b"foo")
|
|
signal.alarm(1)
|
|
# Expected behaviour:
|
|
# - first raw read() returns partial b"foo"
|
|
# - second raw read() returns EINTR
|
|
# - third raw read() returns b"bar"
|
|
self.assertEqual(decode(rio.read(6)), "foobar")
|
|
finally:
|
|
rio.close()
|
|
os.close(w)
|
|
os.close(r)
|
|
|
|
def test_interrupted_read_retry_buffered(self):
|
|
self.check_interrupted_read_retry(lambda x: x.decode('latin1'),
|
|
mode="rb")
|
|
|
|
def test_interrupted_read_retry_text(self):
|
|
self.check_interrupted_read_retry(lambda x: x,
|
|
mode="r")
|
|
|
|
@unittest.skipUnless(threading, 'Threading required for this test.')
|
|
def check_interrupted_write_retry(self, item, **fdopen_kwargs):
|
|
"""Check that a buffered write, when it gets interrupted (either
|
|
returning a partial result or EINTR), properly invokes the signal
|
|
handler and retries if the latter returned successfully."""
|
|
select = support.import_module("select")
|
|
# A quantity that exceeds the buffer size of an anonymous pipe's
|
|
# write end.
|
|
N = 1024 * 1024
|
|
r, w = os.pipe()
|
|
fdopen_kwargs["closefd"] = False
|
|
# We need a separate thread to read from the pipe and allow the
|
|
# write() to finish. This thread is started after the SIGALRM is
|
|
# received (forcing a first EINTR in write()).
|
|
read_results = []
|
|
write_finished = False
|
|
def _read():
|
|
while not write_finished:
|
|
while r in select.select([r], [], [], 1.0)[0]:
|
|
s = os.read(r, 1024)
|
|
read_results.append(s)
|
|
t = threading.Thread(target=_read)
|
|
t.daemon = True
|
|
def alarm1(sig, frame):
|
|
signal.signal(signal.SIGALRM, alarm2)
|
|
signal.alarm(1)
|
|
def alarm2(sig, frame):
|
|
t.start()
|
|
signal.signal(signal.SIGALRM, alarm1)
|
|
try:
|
|
wio = self.io.open(w, **fdopen_kwargs)
|
|
signal.alarm(1)
|
|
# Expected behaviour:
|
|
# - first raw write() is partial (because of the limited pipe buffer
|
|
# and the first alarm)
|
|
# - second raw write() returns EINTR (because of the second alarm)
|
|
# - subsequent write()s are successful (either partial or complete)
|
|
self.assertEqual(N, wio.write(item * N))
|
|
wio.flush()
|
|
write_finished = True
|
|
t.join()
|
|
self.assertEqual(N, sum(len(x) for x in read_results))
|
|
finally:
|
|
write_finished = True
|
|
os.close(w)
|
|
os.close(r)
|
|
# This is deliberate. If we didn't close the file descriptor
|
|
# before closing wio, wio would try to flush its internal
|
|
# buffer, and could block (in case of failure).
|
|
try:
|
|
wio.close()
|
|
except IOError as e:
|
|
if e.errno != errno.EBADF:
|
|
raise
|
|
|
|
def test_interrupted_write_retry_buffered(self):
|
|
self.check_interrupted_write_retry(b"x", mode="wb")
|
|
|
|
def test_interrupted_write_retry_text(self):
|
|
self.check_interrupted_write_retry("x", mode="w", encoding="latin1")
|
|
|
|
|
|
class CSignalsTest(SignalsTest):
|
|
io = io
|
|
|
|
class PySignalsTest(SignalsTest):
|
|
io = pyio
|
|
|
|
# Handling reentrancy issues would slow down _pyio even more, so the
|
|
# tests are disabled.
|
|
test_reentrant_write_buffered = None
|
|
test_reentrant_write_text = None
|
|
|
|
|
|
def test_main():
|
|
tests = (CIOTest, PyIOTest,
|
|
CBufferedReaderTest, PyBufferedReaderTest,
|
|
CBufferedWriterTest, PyBufferedWriterTest,
|
|
CBufferedRWPairTest, PyBufferedRWPairTest,
|
|
CBufferedRandomTest, PyBufferedRandomTest,
|
|
StatefulIncrementalDecoderTest,
|
|
CIncrementalNewlineDecoderTest, PyIncrementalNewlineDecoderTest,
|
|
CTextIOWrapperTest, PyTextIOWrapperTest,
|
|
CMiscIOTest, PyMiscIOTest,
|
|
CSignalsTest, PySignalsTest,
|
|
)
|
|
|
|
# Put the namespaces of the IO module we are testing and some useful mock
|
|
# classes in the __dict__ of each test.
|
|
mocks = (MockRawIO, MisbehavedRawIO, MockFileIO, CloseFailureIO,
|
|
MockNonBlockWriterIO, MockUnseekableIO, MockRawIOWithoutRead)
|
|
all_members = io.__all__ + ["IncrementalNewlineDecoder"]
|
|
c_io_ns = {name : getattr(io, name) for name in all_members}
|
|
py_io_ns = {name : getattr(pyio, name) for name in all_members}
|
|
globs = globals()
|
|
c_io_ns.update((x.__name__, globs["C" + x.__name__]) for x in mocks)
|
|
py_io_ns.update((x.__name__, globs["Py" + x.__name__]) for x in mocks)
|
|
# Avoid turning open into a bound method.
|
|
py_io_ns["open"] = pyio.OpenWrapper
|
|
for test in tests:
|
|
if test.__name__.startswith("C"):
|
|
for name, obj in c_io_ns.items():
|
|
setattr(test, name, obj)
|
|
elif test.__name__.startswith("Py"):
|
|
for name, obj in py_io_ns.items():
|
|
setattr(test, name, obj)
|
|
|
|
support.run_unittest(*tests)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|