Mercurial > cpython-lru_cache-weakref
annotate Lib/test/test_fileio.py @ 79675:c0a2294de787 2.7
Issue #16199: Backport 2to3 typo fix from 3.2.
| author | Chris Jerdonek <chris.jerdonek@gmail.com> |
|---|---|
| date | Thu, 11 Oct 2012 16:15:46 -0700 |
| parents | d7040647d590 |
| children | 2f314971e164 |
| rev | line source |
|---|---|
| 48016 | 1 # Adapted from test_file.py by Daniel Stutzbach |
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2 |
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3 from __future__ import unicode_literals |
| 48016 | 4 |
| 5 import sys | |
| 6 import os | |
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7 import errno |
| 48016 | 8 import unittest |
| 9 from array import array | |
| 10 from weakref import proxy | |
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11 from functools import wraps |
| 48016 | 12 |
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13 from test.test_support import TESTFN, check_warnings, run_unittest, make_bad_fd |
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14 from test.test_support import py3k_bytes as bytes |
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15 from test.script_helper import run_python |
| 48016 | 16 |
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17 from _io import FileIO as _FileIO |
| 48016 | 18 |
| 19 class AutoFileTests(unittest.TestCase): | |
| 20 # file tests for which a test file is automatically set up | |
| 21 | |
| 22 def setUp(self): | |
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23 self.f = _FileIO(TESTFN, 'w') |
| 48016 | 24 |
| 25 def tearDown(self): | |
| 26 if self.f: | |
| 27 self.f.close() | |
| 28 os.remove(TESTFN) | |
| 29 | |
| 30 def testWeakRefs(self): | |
| 31 # verify weak references | |
| 32 p = proxy(self.f) | |
| 33 p.write(bytes(range(10))) | |
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34 self.assertEqual(self.f.tell(), p.tell()) |
| 48016 | 35 self.f.close() |
| 36 self.f = None | |
| 37 self.assertRaises(ReferenceError, getattr, p, 'tell') | |
| 38 | |
| 39 def testSeekTell(self): | |
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40 self.f.write(bytes(range(20))) |
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41 self.assertEqual(self.f.tell(), 20) |
| 48016 | 42 self.f.seek(0) |
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43 self.assertEqual(self.f.tell(), 0) |
| 48016 | 44 self.f.seek(10) |
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45 self.assertEqual(self.f.tell(), 10) |
| 48016 | 46 self.f.seek(5, 1) |
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47 self.assertEqual(self.f.tell(), 15) |
| 48016 | 48 self.f.seek(-5, 1) |
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49 self.assertEqual(self.f.tell(), 10) |
| 48016 | 50 self.f.seek(-5, 2) |
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51 self.assertEqual(self.f.tell(), 15) |
| 48016 | 52 |
| 53 def testAttributes(self): | |
| 54 # verify expected attributes exist | |
| 55 f = self.f | |
| 56 | |
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57 self.assertEqual(f.mode, "wb") |
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58 self.assertEqual(f.closed, False) |
| 48016 | 59 |
| 60 # verify the attributes are readonly | |
| 61 for attr in 'mode', 'closed': | |
| 62 self.assertRaises((AttributeError, TypeError), | |
| 63 setattr, f, attr, 'oops') | |
| 64 | |
| 65 def testReadinto(self): | |
| 66 # verify readinto | |
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67 self.f.write(b"\x01\x02") |
| 48016 | 68 self.f.close() |
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69 a = array(b'b', b'x'*10) |
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70 self.f = _FileIO(TESTFN, 'r') |
| 48016 | 71 n = self.f.readinto(a) |
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72 self.assertEqual(array(b'b', [1, 2]), a[:n]) |
| 48016 | 73 |
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74 def test_none_args(self): |
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75 self.f.write(b"hi\nbye\nabc") |
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76 self.f.close() |
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77 self.f = _FileIO(TESTFN, 'r') |
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78 self.assertEqual(self.f.read(None), b"hi\nbye\nabc") |
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79 self.f.seek(0) |
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80 self.assertEqual(self.f.readline(None), b"hi\n") |
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81 self.assertEqual(self.f.readlines(None), [b"bye\n", b"abc"]) |
| 48016 | 82 |
| 83 def testRepr(self): | |
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84 self.assertEqual(repr(self.f), "<_io.FileIO name=%r mode='%s'>" |
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85 % (self.f.name, self.f.mode)) |
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86 del self.f.name |
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87 self.assertEqual(repr(self.f), "<_io.FileIO fd=%r mode='%s'>" |
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88 % (self.f.fileno(), self.f.mode)) |
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89 self.f.close() |
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90 self.assertEqual(repr(self.f), "<_io.FileIO [closed]>") |
| 48016 | 91 |
| 92 def testErrors(self): | |
| 93 f = self.f | |
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94 self.assertTrue(not f.isatty()) |
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95 self.assertTrue(not f.closed) |
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96 #self.assertEqual(f.name, TESTFN) |
| 48016 | 97 self.assertRaises(ValueError, f.read, 10) # Open for reading |
| 98 f.close() | |
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99 self.assertTrue(f.closed) |
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100 f = _FileIO(TESTFN, 'r') |
| 48016 | 101 self.assertRaises(TypeError, f.readinto, "") |
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102 self.assertTrue(not f.closed) |
| 48016 | 103 f.close() |
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104 self.assertTrue(f.closed) |
| 48016 | 105 |
| 106 def testMethods(self): | |
| 107 methods = ['fileno', 'isatty', 'read', 'readinto', | |
| 108 'seek', 'tell', 'truncate', 'write', 'seekable', | |
| 109 'readable', 'writable'] | |
| 110 if sys.platform.startswith('atheos'): | |
| 111 methods.remove('truncate') | |
| 112 | |
| 113 self.f.close() | |
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114 self.assertTrue(self.f.closed) |
| 48016 | 115 |
| 116 for methodname in methods: | |
| 117 method = getattr(self.f, methodname) | |
| 118 # should raise on closed file | |
| 119 self.assertRaises(ValueError, method) | |
| 120 | |
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121 def testOpendir(self): |
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122 # Issue 3703: opening a directory should fill the errno |
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123 # Windows always returns "[Errno 13]: Permission denied |
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124 # Unix calls dircheck() and returns "[Errno 21]: Is a directory" |
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125 try: |
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126 _FileIO('.', 'r') |
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127 except IOError as e: |
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128 self.assertNotEqual(e.errno, 0) |
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129 self.assertEqual(e.filename, ".") |
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130 else: |
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131 self.fail("Should have raised IOError") |
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132 |
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133 @unittest.skipIf(os.name == 'nt', "test only works on a POSIX-like system") |
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134 def testOpenDirFD(self): |
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135 fd = os.open('.', os.O_RDONLY) |
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136 with self.assertRaises(IOError) as cm: |
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137 _FileIO(fd, 'r') |
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138 os.close(fd) |
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139 self.assertEqual(cm.exception.errno, errno.EISDIR) |
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140 |
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141 #A set of functions testing that we get expected behaviour if someone has |
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142 #manually closed the internal file descriptor. First, a decorator: |
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143 def ClosedFD(func): |
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144 @wraps(func) |
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145 def wrapper(self): |
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146 #forcibly close the fd before invoking the problem function |
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147 f = self.f |
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148 os.close(f.fileno()) |
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149 try: |
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150 func(self, f) |
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151 finally: |
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152 try: |
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153 self.f.close() |
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154 except IOError: |
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155 pass |
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156 return wrapper |
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157 |
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158 def ClosedFDRaises(func): |
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159 @wraps(func) |
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160 def wrapper(self): |
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161 #forcibly close the fd before invoking the problem function |
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162 f = self.f |
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163 os.close(f.fileno()) |
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164 try: |
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165 func(self, f) |
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166 except IOError as e: |
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167 self.assertEqual(e.errno, errno.EBADF) |
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168 else: |
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169 self.fail("Should have raised IOError") |
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170 finally: |
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171 try: |
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172 self.f.close() |
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173 except IOError: |
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174 pass |
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175 return wrapper |
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176 |
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177 @ClosedFDRaises |
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178 def testErrnoOnClose(self, f): |
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179 f.close() |
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180 |
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181 @ClosedFDRaises |
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182 def testErrnoOnClosedWrite(self, f): |
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183 f.write('a') |
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184 |
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185 @ClosedFDRaises |
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186 def testErrnoOnClosedSeek(self, f): |
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187 f.seek(0) |
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188 |
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189 @ClosedFDRaises |
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190 def testErrnoOnClosedTell(self, f): |
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191 f.tell() |
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192 |
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193 @ClosedFDRaises |
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194 def testErrnoOnClosedTruncate(self, f): |
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195 f.truncate(0) |
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196 |
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197 @ClosedFD |
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198 def testErrnoOnClosedSeekable(self, f): |
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199 f.seekable() |
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200 |
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201 @ClosedFD |
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202 def testErrnoOnClosedReadable(self, f): |
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203 f.readable() |
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204 |
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205 @ClosedFD |
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206 def testErrnoOnClosedWritable(self, f): |
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207 f.writable() |
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208 |
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209 @ClosedFD |
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210 def testErrnoOnClosedFileno(self, f): |
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211 f.fileno() |
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212 |
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213 @ClosedFD |
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214 def testErrnoOnClosedIsatty(self, f): |
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215 self.assertEqual(f.isatty(), False) |
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216 |
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217 def ReopenForRead(self): |
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218 try: |
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219 self.f.close() |
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220 except IOError: |
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221 pass |
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222 self.f = _FileIO(TESTFN, 'r') |
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223 os.close(self.f.fileno()) |
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224 return self.f |
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225 |
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226 @ClosedFDRaises |
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227 def testErrnoOnClosedRead(self, f): |
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228 f = self.ReopenForRead() |
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229 f.read(1) |
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230 |
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231 @ClosedFDRaises |
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232 def testErrnoOnClosedReadall(self, f): |
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233 f = self.ReopenForRead() |
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234 f.readall() |
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235 |
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236 @ClosedFDRaises |
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237 def testErrnoOnClosedReadinto(self, f): |
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238 f = self.ReopenForRead() |
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239 a = array(b'b', b'x'*10) |
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240 f.readinto(a) |
| 48016 | 241 |
| 242 class OtherFileTests(unittest.TestCase): | |
| 243 | |
| 244 def testAbles(self): | |
| 245 try: | |
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246 f = _FileIO(TESTFN, "w") |
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247 self.assertEqual(f.readable(), False) |
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248 self.assertEqual(f.writable(), True) |
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249 self.assertEqual(f.seekable(), True) |
| 48016 | 250 f.close() |
| 251 | |
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252 f = _FileIO(TESTFN, "r") |
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253 self.assertEqual(f.readable(), True) |
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254 self.assertEqual(f.writable(), False) |
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255 self.assertEqual(f.seekable(), True) |
| 48016 | 256 f.close() |
| 257 | |
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258 f = _FileIO(TESTFN, "a+") |
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259 self.assertEqual(f.readable(), True) |
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260 self.assertEqual(f.writable(), True) |
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261 self.assertEqual(f.seekable(), True) |
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262 self.assertEqual(f.isatty(), False) |
| 48016 | 263 f.close() |
| 264 | |
| 265 if sys.platform != "win32": | |
| 266 try: | |
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267 f = _FileIO("/dev/tty", "a") |
| 48016 | 268 except EnvironmentError: |
| 269 # When run in a cron job there just aren't any | |
| 270 # ttys, so skip the test. This also handles other | |
| 271 # OS'es that don't support /dev/tty. | |
| 272 pass | |
| 273 else: | |
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274 self.assertEqual(f.readable(), False) |
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275 self.assertEqual(f.writable(), True) |
| 48016 | 276 if sys.platform != "darwin" and \ |
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277 'bsd' not in sys.platform and \ |
| 48016 | 278 not sys.platform.startswith('sunos'): |
| 279 # Somehow /dev/tty appears seekable on some BSDs | |
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280 self.assertEqual(f.seekable(), False) |
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281 self.assertEqual(f.isatty(), True) |
| 48016 | 282 f.close() |
| 283 finally: | |
| 284 os.unlink(TESTFN) | |
| 285 | |
| 286 def testModeStrings(self): | |
| 287 # check invalid mode strings | |
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288 for mode in ("", "aU", "wU+", "rw", "rt"): |
| 48016 | 289 try: |
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290 f = _FileIO(TESTFN, mode) |
| 48016 | 291 except ValueError: |
| 292 pass | |
| 293 else: | |
| 294 f.close() | |
| 295 self.fail('%r is an invalid file mode' % mode) | |
| 296 | |
| 297 def testUnicodeOpen(self): | |
| 298 # verify repr works for unicode too | |
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299 f = _FileIO(str(TESTFN), "w") |
| 48016 | 300 f.close() |
| 301 os.unlink(TESTFN) | |
| 302 | |
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303 def testBytesOpen(self): |
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304 # Opening a bytes filename |
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305 try: |
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306 fn = TESTFN.encode("ascii") |
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307 except UnicodeEncodeError: |
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308 # Skip test |
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309 return |
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310 f = _FileIO(fn, "w") |
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311 try: |
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312 f.write(b"abc") |
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313 f.close() |
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314 with open(TESTFN, "rb") as f: |
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315 self.assertEqual(f.read(), b"abc") |
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316 finally: |
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317 os.unlink(TESTFN) |
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318 |
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319 def testInvalidFd(self): |
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320 self.assertRaises(ValueError, _FileIO, -10) |
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321 self.assertRaises(OSError, _FileIO, make_bad_fd()) |
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322 if sys.platform == 'win32': |
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323 import msvcrt |
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324 self.assertRaises(IOError, msvcrt.get_osfhandle, make_bad_fd()) |
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325 |
| 48016 | 326 def testBadModeArgument(self): |
| 327 # verify that we get a sensible error message for bad mode argument | |
| 328 bad_mode = "qwerty" | |
| 329 try: | |
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330 f = _FileIO(TESTFN, bad_mode) |
| 48016 | 331 except ValueError as msg: |
| 332 if msg.args[0] != 0: | |
| 333 s = str(msg) | |
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334 if TESTFN in s or bad_mode not in s: |
| 48016 | 335 self.fail("bad error message for invalid mode: %s" % s) |
| 336 # if msg.args[0] == 0, we're probably on Windows where there may be | |
| 337 # no obvious way to discover why open() failed. | |
| 338 else: | |
| 339 f.close() | |
| 340 self.fail("no error for invalid mode: %s" % bad_mode) | |
| 341 | |
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342 def testTruncate(self): |
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343 f = _FileIO(TESTFN, 'w') |
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344 f.write(bytes(bytearray(range(10)))) |
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345 self.assertEqual(f.tell(), 10) |
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346 f.truncate(5) |
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347 self.assertEqual(f.tell(), 10) |
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348 self.assertEqual(f.seek(0, os.SEEK_END), 5) |
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349 f.truncate(15) |
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350 self.assertEqual(f.tell(), 5) |
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351 self.assertEqual(f.seek(0, os.SEEK_END), 15) |
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352 f.close() |
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353 |
| 48016 | 354 def testTruncateOnWindows(self): |
| 355 def bug801631(): | |
| 356 # SF bug <http://www.python.org/sf/801631> | |
| 357 # "file.truncate fault on windows" | |
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358 f = _FileIO(TESTFN, 'w') |
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359 f.write(bytes(range(11))) |
| 48016 | 360 f.close() |
| 361 | |
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362 f = _FileIO(TESTFN,'r+') |
| 48016 | 363 data = f.read(5) |
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364 if data != bytes(range(5)): |
| 48016 | 365 self.fail("Read on file opened for update failed %r" % data) |
| 366 if f.tell() != 5: | |
| 367 self.fail("File pos after read wrong %d" % f.tell()) | |
| 368 | |
| 369 f.truncate() | |
| 370 if f.tell() != 5: | |
| 371 self.fail("File pos after ftruncate wrong %d" % f.tell()) | |
| 372 | |
| 373 f.close() | |
| 374 size = os.path.getsize(TESTFN) | |
| 375 if size != 5: | |
| 376 self.fail("File size after ftruncate wrong %d" % size) | |
| 377 | |
| 378 try: | |
| 379 bug801631() | |
| 380 finally: | |
| 381 os.unlink(TESTFN) | |
| 382 | |
| 383 def testAppend(self): | |
| 384 try: | |
| 385 f = open(TESTFN, 'wb') | |
| 386 f.write(b'spam') | |
| 387 f.close() | |
| 388 f = open(TESTFN, 'ab') | |
| 389 f.write(b'eggs') | |
| 390 f.close() | |
| 391 f = open(TESTFN, 'rb') | |
| 392 d = f.read() | |
| 393 f.close() | |
| 394 self.assertEqual(d, b'spameggs') | |
| 395 finally: | |
| 396 try: | |
| 397 os.unlink(TESTFN) | |
| 398 except: | |
| 399 pass | |
| 400 | |
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401 def testInvalidInit(self): |
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402 self.assertRaises(TypeError, _FileIO, "1", 0, 0) |
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403 |
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404 def testWarnings(self): |
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405 with check_warnings(quiet=True) as w: |
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406 self.assertEqual(w.warnings, []) |
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407 self.assertRaises(TypeError, _FileIO, []) |
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408 self.assertEqual(w.warnings, []) |
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409 self.assertRaises(ValueError, _FileIO, "/some/invalid/name", "rt") |
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410 self.assertEqual(w.warnings, []) |
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411 |
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412 def test_surrogates(self): |
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413 # Issue #8438: try to open a filename containing surrogates. |
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414 # It should either fail because the file doesn't exist or the filename |
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415 # can't be represented using the filesystem encoding, but not because |
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416 # of a LookupError for the error handler "surrogateescape". |
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417 filename = u'\udc80.txt' |
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418 try: |
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419 with _FileIO(filename): |
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420 pass |
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421 except (UnicodeEncodeError, IOError): |
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422 pass |
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423 # Spawn a separate Python process with a different "file system |
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424 # default encoding", to exercise this further. |
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425 env = dict(os.environ) |
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426 env[b'LC_CTYPE'] = b'C' |
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427 _, out = run_python('-c', 'import _io; _io.FileIO(%r)' % filename, env=env) |
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428 if ('UnicodeEncodeError' not in out and |
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429 'IOError: [Errno 2] No such file or directory' not in out): |
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430 self.fail('Bad output: %r' % out) |
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431 |
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432 def testUnclosedFDOnException(self): |
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433 class MyException(Exception): pass |
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434 class MyFileIO(_FileIO): |
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435 def __setattr__(self, name, value): |
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436 if name == "name": |
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437 raise MyException("blocked setting name") |
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438 return super(MyFileIO, self).__setattr__(name, value) |
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439 fd = os.open(__file__, os.O_RDONLY) |
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440 self.assertRaises(MyException, MyFileIO, fd) |
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441 os.close(fd) # should not raise OSError(EBADF) |
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442 |
| 48016 | 443 def test_main(): |
| 444 # Historically, these tests have been sloppy about removing TESTFN. | |
| 445 # So get rid of it no matter what. | |
| 446 try: | |
| 447 run_unittest(AutoFileTests, OtherFileTests) | |
| 448 finally: | |
| 449 if os.path.exists(TESTFN): | |
| 450 os.unlink(TESTFN) | |
| 451 | |
| 452 if __name__ == '__main__': | |
| 453 test_main() |