620 lines
20 KiB
Python
620 lines
20 KiB
Python
# Adapted from test_file.py by Daniel Stutzbach
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import sys
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import os
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import io
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import errno
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import unittest
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from array import array
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from weakref import proxy
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from functools import wraps
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from test.support import (run_unittest, cpython_only, swap_attr)
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from test.support.os_helper import (TESTFN, TESTFN_UNICODE, make_bad_fd)
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from test.support.warnings_helper import check_warnings
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from collections import UserList
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import _io # C implementation of io
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import _pyio # Python implementation of io
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class AutoFileTests:
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# file tests for which a test file is automatically set up
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def setUp(self):
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self.f = self.FileIO(TESTFN, 'w')
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def tearDown(self):
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if self.f:
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self.f.close()
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os.remove(TESTFN)
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def testWeakRefs(self):
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# verify weak references
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p = proxy(self.f)
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p.write(bytes(range(10)))
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self.assertEqual(self.f.tell(), p.tell())
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self.f.close()
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self.f = None
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self.assertRaises(ReferenceError, getattr, p, 'tell')
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def testSeekTell(self):
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self.f.write(bytes(range(20)))
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self.assertEqual(self.f.tell(), 20)
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self.f.seek(0)
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self.assertEqual(self.f.tell(), 0)
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self.f.seek(10)
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self.assertEqual(self.f.tell(), 10)
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self.f.seek(5, 1)
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self.assertEqual(self.f.tell(), 15)
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self.f.seek(-5, 1)
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self.assertEqual(self.f.tell(), 10)
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self.f.seek(-5, 2)
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self.assertEqual(self.f.tell(), 15)
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def testAttributes(self):
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# verify expected attributes exist
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f = self.f
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self.assertEqual(f.mode, "wb")
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self.assertEqual(f.closed, False)
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# verify the attributes are readonly
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for attr in 'mode', 'closed':
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self.assertRaises((AttributeError, TypeError),
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setattr, f, attr, 'oops')
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def testBlksize(self):
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# test private _blksize attribute
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blksize = io.DEFAULT_BUFFER_SIZE
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# try to get preferred blksize from stat.st_blksize, if available
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if hasattr(os, 'fstat'):
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fst = os.fstat(self.f.fileno())
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blksize = getattr(fst, 'st_blksize', blksize)
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self.assertEqual(self.f._blksize, blksize)
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# verify readinto
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def testReadintoByteArray(self):
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self.f.write(bytes([1, 2, 0, 255]))
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self.f.close()
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ba = bytearray(b'abcdefgh')
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with self.FileIO(TESTFN, 'r') as f:
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n = f.readinto(ba)
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self.assertEqual(ba, b'\x01\x02\x00\xffefgh')
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self.assertEqual(n, 4)
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def _testReadintoMemoryview(self):
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self.f.write(bytes([1, 2, 0, 255]))
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self.f.close()
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m = memoryview(bytearray(b'abcdefgh'))
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with self.FileIO(TESTFN, 'r') as f:
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n = f.readinto(m)
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self.assertEqual(m, b'\x01\x02\x00\xffefgh')
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self.assertEqual(n, 4)
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m = memoryview(bytearray(b'abcdefgh')).cast('H', shape=[2, 2])
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with self.FileIO(TESTFN, 'r') as f:
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n = f.readinto(m)
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self.assertEqual(bytes(m), b'\x01\x02\x00\xffefgh')
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self.assertEqual(n, 4)
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def _testReadintoArray(self):
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self.f.write(bytes([1, 2, 0, 255]))
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self.f.close()
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a = array('B', b'abcdefgh')
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with self.FileIO(TESTFN, 'r') as f:
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n = f.readinto(a)
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self.assertEqual(a, array('B', [1, 2, 0, 255, 101, 102, 103, 104]))
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self.assertEqual(n, 4)
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a = array('b', b'abcdefgh')
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with self.FileIO(TESTFN, 'r') as f:
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n = f.readinto(a)
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self.assertEqual(a, array('b', [1, 2, 0, -1, 101, 102, 103, 104]))
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self.assertEqual(n, 4)
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a = array('I', b'abcdefgh')
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with self.FileIO(TESTFN, 'r') as f:
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n = f.readinto(a)
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self.assertEqual(a, array('I', b'\x01\x02\x00\xffefgh'))
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self.assertEqual(n, 4)
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def testWritelinesList(self):
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l = [b'123', b'456']
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self.f.writelines(l)
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self.f.close()
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self.f = self.FileIO(TESTFN, 'rb')
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buf = self.f.read()
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self.assertEqual(buf, b'123456')
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def testWritelinesUserList(self):
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l = UserList([b'123', b'456'])
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self.f.writelines(l)
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self.f.close()
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self.f = self.FileIO(TESTFN, 'rb')
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buf = self.f.read()
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self.assertEqual(buf, b'123456')
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def testWritelinesError(self):
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self.assertRaises(TypeError, self.f.writelines, [1, 2, 3])
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self.assertRaises(TypeError, self.f.writelines, None)
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self.assertRaises(TypeError, self.f.writelines, "abc")
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def test_none_args(self):
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self.f.write(b"hi\nbye\nabc")
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self.f.close()
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self.f = self.FileIO(TESTFN, 'r')
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self.assertEqual(self.f.read(None), b"hi\nbye\nabc")
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self.f.seek(0)
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self.assertEqual(self.f.readline(None), b"hi\n")
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self.assertEqual(self.f.readlines(None), [b"bye\n", b"abc"])
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def test_reject(self):
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self.assertRaises(TypeError, self.f.write, "Hello!")
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def testRepr(self):
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self.assertEqual(repr(self.f),
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"<%s.FileIO name=%r mode=%r closefd=True>" %
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(self.modulename, self.f.name, self.f.mode))
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del self.f.name
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self.assertEqual(repr(self.f),
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"<%s.FileIO fd=%r mode=%r closefd=True>" %
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(self.modulename, self.f.fileno(), self.f.mode))
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self.f.close()
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self.assertEqual(repr(self.f),
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"<%s.FileIO [closed]>" % (self.modulename,))
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def testReprNoCloseFD(self):
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fd = os.open(TESTFN, os.O_RDONLY)
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try:
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with self.FileIO(fd, 'r', closefd=False) as f:
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self.assertEqual(repr(f),
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"<%s.FileIO name=%r mode=%r closefd=False>" %
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(self.modulename, f.name, f.mode))
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finally:
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os.close(fd)
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def testRecursiveRepr(self):
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# Issue #25455
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with swap_attr(self.f, 'name', self.f):
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with self.assertRaises(RuntimeError):
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repr(self.f) # Should not crash
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def testErrors(self):
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f = self.f
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self.assertFalse(f.isatty())
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self.assertFalse(f.closed)
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#self.assertEqual(f.name, TESTFN)
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self.assertRaises(ValueError, f.read, 10) # Open for reading
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f.close()
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self.assertTrue(f.closed)
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f = self.FileIO(TESTFN, 'r')
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self.assertRaises(TypeError, f.readinto, "")
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self.assertFalse(f.closed)
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f.close()
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self.assertTrue(f.closed)
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def testMethods(self):
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methods = ['fileno', 'isatty', 'seekable', 'readable', 'writable',
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'read', 'readall', 'readline', 'readlines',
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'tell', 'truncate', 'flush']
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self.f.close()
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self.assertTrue(self.f.closed)
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for methodname in methods:
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method = getattr(self.f, methodname)
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# should raise on closed file
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self.assertRaises(ValueError, method)
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self.assertRaises(TypeError, self.f.readinto)
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self.assertRaises(ValueError, self.f.readinto, bytearray(1))
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self.assertRaises(TypeError, self.f.seek)
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self.assertRaises(ValueError, self.f.seek, 0)
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self.assertRaises(TypeError, self.f.write)
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self.assertRaises(ValueError, self.f.write, b'')
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self.assertRaises(TypeError, self.f.writelines)
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self.assertRaises(ValueError, self.f.writelines, b'')
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def testOpendir(self):
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# Issue 3703: opening a directory should fill the errno
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# Windows always returns "[Errno 13]: Permission denied
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# Unix uses fstat and returns "[Errno 21]: Is a directory"
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try:
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self.FileIO('.', 'r')
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except OSError as e:
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self.assertNotEqual(e.errno, 0)
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self.assertEqual(e.filename, ".")
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else:
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self.fail("Should have raised OSError")
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@unittest.skipIf(os.name == 'nt', "test only works on a POSIX-like system")
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def testOpenDirFD(self):
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fd = os.open('.', os.O_RDONLY)
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with self.assertRaises(OSError) as cm:
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self.FileIO(fd, 'r')
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os.close(fd)
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self.assertEqual(cm.exception.errno, errno.EISDIR)
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#A set of functions testing that we get expected behaviour if someone has
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#manually closed the internal file descriptor. First, a decorator:
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def ClosedFD(func):
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@wraps(func)
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def wrapper(self):
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#forcibly close the fd before invoking the problem function
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f = self.f
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os.close(f.fileno())
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try:
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func(self, f)
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finally:
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try:
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self.f.close()
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except OSError:
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pass
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return wrapper
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def ClosedFDRaises(func):
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@wraps(func)
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def wrapper(self):
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#forcibly close the fd before invoking the problem function
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f = self.f
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os.close(f.fileno())
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try:
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func(self, f)
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except OSError as e:
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self.assertEqual(e.errno, errno.EBADF)
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else:
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self.fail("Should have raised OSError")
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finally:
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try:
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self.f.close()
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except OSError:
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pass
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return wrapper
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@ClosedFDRaises
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def testErrnoOnClose(self, f):
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f.close()
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@ClosedFDRaises
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def testErrnoOnClosedWrite(self, f):
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f.write(b'a')
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@ClosedFDRaises
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def testErrnoOnClosedSeek(self, f):
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f.seek(0)
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@ClosedFDRaises
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def testErrnoOnClosedTell(self, f):
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f.tell()
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@ClosedFDRaises
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def testErrnoOnClosedTruncate(self, f):
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f.truncate(0)
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@ClosedFD
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def testErrnoOnClosedSeekable(self, f):
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f.seekable()
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@ClosedFD
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def testErrnoOnClosedReadable(self, f):
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f.readable()
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@ClosedFD
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def testErrnoOnClosedWritable(self, f):
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f.writable()
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@ClosedFD
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def testErrnoOnClosedFileno(self, f):
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f.fileno()
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@ClosedFD
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def testErrnoOnClosedIsatty(self, f):
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self.assertEqual(f.isatty(), False)
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def ReopenForRead(self):
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try:
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self.f.close()
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except OSError:
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pass
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self.f = self.FileIO(TESTFN, 'r')
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os.close(self.f.fileno())
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return self.f
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@ClosedFDRaises
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def testErrnoOnClosedRead(self, f):
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f = self.ReopenForRead()
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f.read(1)
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@ClosedFDRaises
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def testErrnoOnClosedReadall(self, f):
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f = self.ReopenForRead()
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f.readall()
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@ClosedFDRaises
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def testErrnoOnClosedReadinto(self, f):
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f = self.ReopenForRead()
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a = array('b', b'x'*10)
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f.readinto(a)
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class CAutoFileTests(AutoFileTests, unittest.TestCase):
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FileIO = _io.FileIO
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modulename = '_io'
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class PyAutoFileTests(AutoFileTests, unittest.TestCase):
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FileIO = _pyio.FileIO
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modulename = '_pyio'
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class OtherFileTests:
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def testAbles(self):
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try:
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f = self.FileIO(TESTFN, "w")
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self.assertEqual(f.readable(), False)
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self.assertEqual(f.writable(), True)
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self.assertEqual(f.seekable(), True)
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f.close()
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f = self.FileIO(TESTFN, "r")
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self.assertEqual(f.readable(), True)
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self.assertEqual(f.writable(), False)
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self.assertEqual(f.seekable(), True)
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f.close()
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f = self.FileIO(TESTFN, "a+")
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self.assertEqual(f.readable(), True)
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self.assertEqual(f.writable(), True)
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self.assertEqual(f.seekable(), True)
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self.assertEqual(f.isatty(), False)
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f.close()
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if sys.platform != "win32":
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try:
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f = self.FileIO("/dev/tty", "a")
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except OSError:
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# When run in a cron job there just aren't any
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# ttys, so skip the test. This also handles other
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# OS'es that don't support /dev/tty.
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pass
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else:
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self.assertEqual(f.readable(), False)
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self.assertEqual(f.writable(), True)
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if sys.platform != "darwin" and \
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'bsd' not in sys.platform and \
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not sys.platform.startswith(('sunos', 'aix')):
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# Somehow /dev/tty appears seekable on some BSDs
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self.assertEqual(f.seekable(), False)
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self.assertEqual(f.isatty(), True)
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f.close()
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finally:
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os.unlink(TESTFN)
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def testInvalidModeStrings(self):
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# check invalid mode strings
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for mode in ("", "aU", "wU+", "rw", "rt"):
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try:
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f = self.FileIO(TESTFN, mode)
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except ValueError:
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pass
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else:
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f.close()
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self.fail('%r is an invalid file mode' % mode)
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def testModeStrings(self):
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# test that the mode attribute is correct for various mode strings
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# given as init args
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try:
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for modes in [('w', 'wb'), ('wb', 'wb'), ('wb+', 'rb+'),
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('w+b', 'rb+'), ('a', 'ab'), ('ab', 'ab'),
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('ab+', 'ab+'), ('a+b', 'ab+'), ('r', 'rb'),
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('rb', 'rb'), ('rb+', 'rb+'), ('r+b', 'rb+')]:
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# read modes are last so that TESTFN will exist first
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with self.FileIO(TESTFN, modes[0]) as f:
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self.assertEqual(f.mode, modes[1])
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finally:
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if os.path.exists(TESTFN):
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os.unlink(TESTFN)
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def testUnicodeOpen(self):
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# verify repr works for unicode too
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f = self.FileIO(str(TESTFN), "w")
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f.close()
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os.unlink(TESTFN)
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def testBytesOpen(self):
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# Opening a bytes filename
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try:
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fn = TESTFN.encode("ascii")
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except UnicodeEncodeError:
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self.skipTest('could not encode %r to ascii' % TESTFN)
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f = self.FileIO(fn, "w")
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try:
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f.write(b"abc")
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f.close()
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with open(TESTFN, "rb") as f:
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self.assertEqual(f.read(), b"abc")
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finally:
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os.unlink(TESTFN)
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@unittest.skipIf(sys.getfilesystemencoding() != 'utf-8',
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"test only works for utf-8 filesystems")
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def testUtf8BytesOpen(self):
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# Opening a UTF-8 bytes filename
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try:
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fn = TESTFN_UNICODE.encode("utf-8")
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except UnicodeEncodeError:
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self.skipTest('could not encode %r to utf-8' % TESTFN_UNICODE)
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f = self.FileIO(fn, "w")
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try:
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f.write(b"abc")
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f.close()
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with open(TESTFN_UNICODE, "rb") as f:
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self.assertEqual(f.read(), b"abc")
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finally:
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os.unlink(TESTFN_UNICODE)
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def testConstructorHandlesNULChars(self):
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fn_with_NUL = 'foo\0bar'
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self.assertRaises(ValueError, self.FileIO, fn_with_NUL, 'w')
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self.assertRaises(ValueError, self.FileIO, bytes(fn_with_NUL, 'ascii'), 'w')
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def testInvalidFd(self):
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self.assertRaises(ValueError, self.FileIO, -10)
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self.assertRaises(OSError, self.FileIO, make_bad_fd())
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if sys.platform == 'win32':
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import msvcrt
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self.assertRaises(OSError, msvcrt.get_osfhandle, make_bad_fd())
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def testBadModeArgument(self):
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# verify that we get a sensible error message for bad mode argument
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bad_mode = "qwerty"
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try:
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f = self.FileIO(TESTFN, bad_mode)
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except ValueError as msg:
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if msg.args[0] != 0:
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s = str(msg)
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if TESTFN in s or bad_mode not in s:
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self.fail("bad error message for invalid mode: %s" % s)
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# if msg.args[0] == 0, we're probably on Windows where there may be
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# no obvious way to discover why open() failed.
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else:
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f.close()
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self.fail("no error for invalid mode: %s" % bad_mode)
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def testTruncate(self):
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f = self.FileIO(TESTFN, 'w')
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f.write(bytes(bytearray(range(10))))
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self.assertEqual(f.tell(), 10)
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f.truncate(5)
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self.assertEqual(f.tell(), 10)
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self.assertEqual(f.seek(0, io.SEEK_END), 5)
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f.truncate(15)
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self.assertEqual(f.tell(), 5)
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self.assertEqual(f.seek(0, io.SEEK_END), 15)
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f.close()
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|
|
def testTruncateOnWindows(self):
|
|
def bug801631():
|
|
# SF bug <http://www.python.org/sf/801631>
|
|
# "file.truncate fault on windows"
|
|
f = self.FileIO(TESTFN, 'w')
|
|
f.write(bytes(range(11)))
|
|
f.close()
|
|
|
|
f = self.FileIO(TESTFN,'r+')
|
|
data = f.read(5)
|
|
if data != bytes(range(5)):
|
|
self.fail("Read on file opened for update failed %r" % data)
|
|
if f.tell() != 5:
|
|
self.fail("File pos after read wrong %d" % f.tell())
|
|
|
|
f.truncate()
|
|
if f.tell() != 5:
|
|
self.fail("File pos after ftruncate wrong %d" % f.tell())
|
|
|
|
f.close()
|
|
size = os.path.getsize(TESTFN)
|
|
if size != 5:
|
|
self.fail("File size after ftruncate wrong %d" % size)
|
|
|
|
try:
|
|
bug801631()
|
|
finally:
|
|
os.unlink(TESTFN)
|
|
|
|
def testAppend(self):
|
|
try:
|
|
f = open(TESTFN, 'wb')
|
|
f.write(b'spam')
|
|
f.close()
|
|
f = open(TESTFN, 'ab')
|
|
f.write(b'eggs')
|
|
f.close()
|
|
f = open(TESTFN, 'rb')
|
|
d = f.read()
|
|
f.close()
|
|
self.assertEqual(d, b'spameggs')
|
|
finally:
|
|
try:
|
|
os.unlink(TESTFN)
|
|
except:
|
|
pass
|
|
|
|
def testInvalidInit(self):
|
|
self.assertRaises(TypeError, self.FileIO, "1", 0, 0)
|
|
|
|
def testWarnings(self):
|
|
with check_warnings(quiet=True) as w:
|
|
self.assertEqual(w.warnings, [])
|
|
self.assertRaises(TypeError, self.FileIO, [])
|
|
self.assertEqual(w.warnings, [])
|
|
self.assertRaises(ValueError, self.FileIO, "/some/invalid/name", "rt")
|
|
self.assertEqual(w.warnings, [])
|
|
|
|
def testUnclosedFDOnException(self):
|
|
class MyException(Exception): pass
|
|
class MyFileIO(self.FileIO):
|
|
def __setattr__(self, name, value):
|
|
if name == "name":
|
|
raise MyException("blocked setting name")
|
|
return super(MyFileIO, self).__setattr__(name, value)
|
|
fd = os.open(__file__, os.O_RDONLY)
|
|
self.assertRaises(MyException, MyFileIO, fd)
|
|
os.close(fd) # should not raise OSError(EBADF)
|
|
|
|
|
|
class COtherFileTests(OtherFileTests, unittest.TestCase):
|
|
FileIO = _io.FileIO
|
|
modulename = '_io'
|
|
|
|
@cpython_only
|
|
def testInvalidFd_overflow(self):
|
|
# Issue 15989
|
|
import _testcapi
|
|
self.assertRaises(TypeError, self.FileIO, _testcapi.INT_MAX + 1)
|
|
self.assertRaises(TypeError, self.FileIO, _testcapi.INT_MIN - 1)
|
|
|
|
def test_open_code(self):
|
|
# Check that the default behaviour of open_code matches
|
|
# open("rb")
|
|
with self.FileIO(__file__, "rb") as f:
|
|
expected = f.read()
|
|
with _io.open_code(__file__) as f:
|
|
actual = f.read()
|
|
self.assertEqual(expected, actual)
|
|
|
|
|
|
class PyOtherFileTests(OtherFileTests, unittest.TestCase):
|
|
FileIO = _pyio.FileIO
|
|
modulename = '_pyio'
|
|
|
|
def test_open_code(self):
|
|
# Check that the default behaviour of open_code matches
|
|
# open("rb")
|
|
with self.FileIO(__file__, "rb") as f:
|
|
expected = f.read()
|
|
with check_warnings(quiet=True) as w:
|
|
# Always test _open_code_with_warning
|
|
with _pyio._open_code_with_warning(__file__) as f:
|
|
actual = f.read()
|
|
self.assertEqual(expected, actual)
|
|
self.assertNotEqual(w.warnings, [])
|
|
|
|
|
|
def test_main():
|
|
# Historically, these tests have been sloppy about removing TESTFN.
|
|
# So get rid of it no matter what.
|
|
try:
|
|
run_unittest(CAutoFileTests, PyAutoFileTests,
|
|
COtherFileTests, PyOtherFileTests)
|
|
finally:
|
|
if os.path.exists(TESTFN):
|
|
os.unlink(TESTFN)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|