Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 1 | """Unit tests for memory-based file-like objects. |
| 2 | StringIO -- for unicode strings |
| 3 | BytesIO -- for bytes |
| 4 | """ |
| 5 | |
| 6 | import unittest |
Benjamin Peterson | ee8712c | 2008-05-20 21:35:26 +0000 | [diff] [blame] | 7 | from test import support |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 8 | |
| 9 | import io |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 10 | import _pyio as pyio |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 11 | import pickle |
Antoine Pitrou | cc66a73 | 2014-07-29 19:41:11 -0400 | [diff] [blame] | 12 | import sys |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 13 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 14 | class MemorySeekTestMixin: |
| 15 | |
| 16 | def testInit(self): |
| 17 | buf = self.buftype("1234567890") |
| 18 | bytesIo = self.ioclass(buf) |
| 19 | |
| 20 | def testRead(self): |
| 21 | buf = self.buftype("1234567890") |
| 22 | bytesIo = self.ioclass(buf) |
| 23 | |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 24 | self.assertEqual(buf[:1], bytesIo.read(1)) |
| 25 | self.assertEqual(buf[1:5], bytesIo.read(4)) |
| 26 | self.assertEqual(buf[5:], bytesIo.read(900)) |
| 27 | self.assertEqual(self.EOF, bytesIo.read()) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 28 | |
| 29 | def testReadNoArgs(self): |
| 30 | buf = self.buftype("1234567890") |
| 31 | bytesIo = self.ioclass(buf) |
| 32 | |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 33 | self.assertEqual(buf, bytesIo.read()) |
| 34 | self.assertEqual(self.EOF, bytesIo.read()) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 35 | |
| 36 | def testSeek(self): |
| 37 | buf = self.buftype("1234567890") |
| 38 | bytesIo = self.ioclass(buf) |
| 39 | |
| 40 | bytesIo.read(5) |
| 41 | bytesIo.seek(0) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 42 | self.assertEqual(buf, bytesIo.read()) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 43 | |
| 44 | bytesIo.seek(3) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 45 | self.assertEqual(buf[3:], bytesIo.read()) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 46 | self.assertRaises(TypeError, bytesIo.seek, 0.0) |
| 47 | |
| 48 | def testTell(self): |
| 49 | buf = self.buftype("1234567890") |
| 50 | bytesIo = self.ioclass(buf) |
| 51 | |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 52 | self.assertEqual(0, bytesIo.tell()) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 53 | bytesIo.seek(5) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 54 | self.assertEqual(5, bytesIo.tell()) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 55 | bytesIo.seek(10000) |
Ezio Melotti | b3aedd4 | 2010-11-20 19:04:17 +0000 | [diff] [blame] | 56 | self.assertEqual(10000, bytesIo.tell()) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 57 | |
| 58 | |
| 59 | class MemoryTestMixin: |
| 60 | |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 61 | def test_detach(self): |
| 62 | buf = self.ioclass() |
| 63 | self.assertRaises(self.UnsupportedOperation, buf.detach) |
| 64 | |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 65 | def write_ops(self, f, t): |
| 66 | self.assertEqual(f.write(t("blah.")), 5) |
| 67 | self.assertEqual(f.seek(0), 0) |
| 68 | self.assertEqual(f.write(t("Hello.")), 6) |
| 69 | self.assertEqual(f.tell(), 6) |
| 70 | self.assertEqual(f.seek(5), 5) |
| 71 | self.assertEqual(f.tell(), 5) |
| 72 | self.assertEqual(f.write(t(" world\n\n\n")), 9) |
| 73 | self.assertEqual(f.seek(0), 0) |
| 74 | self.assertEqual(f.write(t("h")), 1) |
| 75 | self.assertEqual(f.truncate(12), 12) |
Antoine Pitrou | 905a2ff | 2010-01-31 22:47:27 +0000 | [diff] [blame] | 76 | self.assertEqual(f.tell(), 1) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 77 | |
| 78 | def test_write(self): |
| 79 | buf = self.buftype("hello world\n") |
| 80 | memio = self.ioclass(buf) |
| 81 | |
| 82 | self.write_ops(memio, self.buftype) |
| 83 | self.assertEqual(memio.getvalue(), buf) |
| 84 | memio = self.ioclass() |
| 85 | self.write_ops(memio, self.buftype) |
| 86 | self.assertEqual(memio.getvalue(), buf) |
| 87 | self.assertRaises(TypeError, memio.write, None) |
| 88 | memio.close() |
| 89 | self.assertRaises(ValueError, memio.write, self.buftype("")) |
| 90 | |
| 91 | def test_writelines(self): |
| 92 | buf = self.buftype("1234567890") |
| 93 | memio = self.ioclass() |
| 94 | |
| 95 | self.assertEqual(memio.writelines([buf] * 100), None) |
| 96 | self.assertEqual(memio.getvalue(), buf * 100) |
| 97 | memio.writelines([]) |
| 98 | self.assertEqual(memio.getvalue(), buf * 100) |
| 99 | memio = self.ioclass() |
| 100 | self.assertRaises(TypeError, memio.writelines, [buf] + [1]) |
| 101 | self.assertEqual(memio.getvalue(), buf) |
| 102 | self.assertRaises(TypeError, memio.writelines, None) |
| 103 | memio.close() |
| 104 | self.assertRaises(ValueError, memio.writelines, []) |
| 105 | |
| 106 | def test_writelines_error(self): |
| 107 | memio = self.ioclass() |
| 108 | def error_gen(): |
| 109 | yield self.buftype('spam') |
| 110 | raise KeyboardInterrupt |
| 111 | |
| 112 | self.assertRaises(KeyboardInterrupt, memio.writelines, error_gen()) |
| 113 | |
| 114 | def test_truncate(self): |
| 115 | buf = self.buftype("1234567890") |
| 116 | memio = self.ioclass(buf) |
| 117 | |
| 118 | self.assertRaises(ValueError, memio.truncate, -1) |
| 119 | memio.seek(6) |
| 120 | self.assertEqual(memio.truncate(), 6) |
| 121 | self.assertEqual(memio.getvalue(), buf[:6]) |
| 122 | self.assertEqual(memio.truncate(4), 4) |
| 123 | self.assertEqual(memio.getvalue(), buf[:4]) |
Antoine Pitrou | 905a2ff | 2010-01-31 22:47:27 +0000 | [diff] [blame] | 124 | self.assertEqual(memio.tell(), 6) |
| 125 | memio.seek(0, 2) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 126 | memio.write(buf) |
| 127 | self.assertEqual(memio.getvalue(), buf[:4] + buf) |
| 128 | pos = memio.tell() |
| 129 | self.assertEqual(memio.truncate(None), pos) |
| 130 | self.assertEqual(memio.tell(), pos) |
| 131 | self.assertRaises(TypeError, memio.truncate, '0') |
| 132 | memio.close() |
| 133 | self.assertRaises(ValueError, memio.truncate, 0) |
| 134 | |
| 135 | def test_init(self): |
| 136 | buf = self.buftype("1234567890") |
| 137 | memio = self.ioclass(buf) |
| 138 | self.assertEqual(memio.getvalue(), buf) |
| 139 | memio = self.ioclass(None) |
| 140 | self.assertEqual(memio.getvalue(), self.EOF) |
| 141 | memio.__init__(buf * 2) |
| 142 | self.assertEqual(memio.getvalue(), buf * 2) |
| 143 | memio.__init__(buf) |
| 144 | self.assertEqual(memio.getvalue(), buf) |
Alexandre Vassalotti | d2bb18b | 2009-07-22 03:07:33 +0000 | [diff] [blame] | 145 | self.assertRaises(TypeError, memio.__init__, []) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 146 | |
| 147 | def test_read(self): |
| 148 | buf = self.buftype("1234567890") |
| 149 | memio = self.ioclass(buf) |
| 150 | |
| 151 | self.assertEqual(memio.read(0), self.EOF) |
| 152 | self.assertEqual(memio.read(1), buf[:1]) |
| 153 | self.assertEqual(memio.read(4), buf[1:5]) |
| 154 | self.assertEqual(memio.read(900), buf[5:]) |
| 155 | self.assertEqual(memio.read(), self.EOF) |
| 156 | memio.seek(0) |
| 157 | self.assertEqual(memio.read(), buf) |
| 158 | self.assertEqual(memio.read(), self.EOF) |
| 159 | self.assertEqual(memio.tell(), 10) |
| 160 | memio.seek(0) |
| 161 | self.assertEqual(memio.read(-1), buf) |
| 162 | memio.seek(0) |
Alexandre Vassalotti | 5da31eb | 2008-05-06 20:30:41 +0000 | [diff] [blame] | 163 | self.assertEqual(type(memio.read()), type(buf)) |
Alexandre Vassalotti | 4833b3c | 2008-05-06 23:47:23 +0000 | [diff] [blame] | 164 | memio.seek(100) |
| 165 | self.assertEqual(type(memio.read()), type(buf)) |
Alexandre Vassalotti | 5da31eb | 2008-05-06 20:30:41 +0000 | [diff] [blame] | 166 | memio.seek(0) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 167 | self.assertEqual(memio.read(None), buf) |
| 168 | self.assertRaises(TypeError, memio.read, '') |
Serhiy Storchaka | 4e63f7a | 2015-09-04 07:48:19 +0300 | [diff] [blame] | 169 | memio.seek(len(buf) + 1) |
| 170 | self.assertEqual(memio.read(1), self.EOF) |
| 171 | memio.seek(len(buf) + 1) |
| 172 | self.assertEqual(memio.read(), self.EOF) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 173 | memio.close() |
| 174 | self.assertRaises(ValueError, memio.read) |
| 175 | |
| 176 | def test_readline(self): |
| 177 | buf = self.buftype("1234567890\n") |
| 178 | memio = self.ioclass(buf * 2) |
| 179 | |
| 180 | self.assertEqual(memio.readline(0), self.EOF) |
| 181 | self.assertEqual(memio.readline(), buf) |
| 182 | self.assertEqual(memio.readline(), buf) |
| 183 | self.assertEqual(memio.readline(), self.EOF) |
| 184 | memio.seek(0) |
| 185 | self.assertEqual(memio.readline(5), buf[:5]) |
| 186 | self.assertEqual(memio.readline(5), buf[5:10]) |
| 187 | self.assertEqual(memio.readline(5), buf[10:15]) |
| 188 | memio.seek(0) |
| 189 | self.assertEqual(memio.readline(-1), buf) |
| 190 | memio.seek(0) |
| 191 | self.assertEqual(memio.readline(0), self.EOF) |
Serhiy Storchaka | 4e63f7a | 2015-09-04 07:48:19 +0300 | [diff] [blame] | 192 | # Issue #24989: Buffer overread |
| 193 | memio.seek(len(buf) * 2 + 1) |
| 194 | self.assertEqual(memio.readline(), self.EOF) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 195 | |
| 196 | buf = self.buftype("1234567890\n") |
| 197 | memio = self.ioclass((buf * 3)[:-1]) |
| 198 | self.assertEqual(memio.readline(), buf) |
| 199 | self.assertEqual(memio.readline(), buf) |
| 200 | self.assertEqual(memio.readline(), buf[:-1]) |
| 201 | self.assertEqual(memio.readline(), self.EOF) |
| 202 | memio.seek(0) |
Alexandre Vassalotti | 5da31eb | 2008-05-06 20:30:41 +0000 | [diff] [blame] | 203 | self.assertEqual(type(memio.readline()), type(buf)) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 204 | self.assertEqual(memio.readline(), buf) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 205 | self.assertRaises(TypeError, memio.readline, '') |
| 206 | memio.close() |
| 207 | self.assertRaises(ValueError, memio.readline) |
| 208 | |
| 209 | def test_readlines(self): |
| 210 | buf = self.buftype("1234567890\n") |
| 211 | memio = self.ioclass(buf * 10) |
| 212 | |
| 213 | self.assertEqual(memio.readlines(), [buf] * 10) |
| 214 | memio.seek(5) |
| 215 | self.assertEqual(memio.readlines(), [buf[5:]] + [buf] * 9) |
| 216 | memio.seek(0) |
| 217 | self.assertEqual(memio.readlines(15), [buf] * 2) |
| 218 | memio.seek(0) |
| 219 | self.assertEqual(memio.readlines(-1), [buf] * 10) |
| 220 | memio.seek(0) |
| 221 | self.assertEqual(memio.readlines(0), [buf] * 10) |
| 222 | memio.seek(0) |
Alexandre Vassalotti | 5da31eb | 2008-05-06 20:30:41 +0000 | [diff] [blame] | 223 | self.assertEqual(type(memio.readlines()[0]), type(buf)) |
| 224 | memio.seek(0) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 225 | self.assertEqual(memio.readlines(None), [buf] * 10) |
| 226 | self.assertRaises(TypeError, memio.readlines, '') |
Serhiy Storchaka | 4e63f7a | 2015-09-04 07:48:19 +0300 | [diff] [blame] | 227 | # Issue #24989: Buffer overread |
| 228 | memio.seek(len(buf) * 10 + 1) |
| 229 | self.assertEqual(memio.readlines(), []) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 230 | memio.close() |
| 231 | self.assertRaises(ValueError, memio.readlines) |
| 232 | |
| 233 | def test_iterator(self): |
| 234 | buf = self.buftype("1234567890\n") |
| 235 | memio = self.ioclass(buf * 10) |
| 236 | |
| 237 | self.assertEqual(iter(memio), memio) |
Benjamin Peterson | c9c0f20 | 2009-06-30 23:06:06 +0000 | [diff] [blame] | 238 | self.assertTrue(hasattr(memio, '__iter__')) |
| 239 | self.assertTrue(hasattr(memio, '__next__')) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 240 | i = 0 |
| 241 | for line in memio: |
| 242 | self.assertEqual(line, buf) |
| 243 | i += 1 |
| 244 | self.assertEqual(i, 10) |
| 245 | memio.seek(0) |
| 246 | i = 0 |
| 247 | for line in memio: |
| 248 | self.assertEqual(line, buf) |
| 249 | i += 1 |
| 250 | self.assertEqual(i, 10) |
Serhiy Storchaka | 4e63f7a | 2015-09-04 07:48:19 +0300 | [diff] [blame] | 251 | # Issue #24989: Buffer overread |
| 252 | memio.seek(len(buf) * 10 + 1) |
| 253 | self.assertEqual(list(memio), []) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 254 | memio = self.ioclass(buf * 2) |
| 255 | memio.close() |
| 256 | self.assertRaises(ValueError, memio.__next__) |
| 257 | |
| 258 | def test_getvalue(self): |
| 259 | buf = self.buftype("1234567890") |
| 260 | memio = self.ioclass(buf) |
| 261 | |
| 262 | self.assertEqual(memio.getvalue(), buf) |
| 263 | memio.read() |
| 264 | self.assertEqual(memio.getvalue(), buf) |
Alexandre Vassalotti | 5da31eb | 2008-05-06 20:30:41 +0000 | [diff] [blame] | 265 | self.assertEqual(type(memio.getvalue()), type(buf)) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 266 | memio = self.ioclass(buf * 1000) |
| 267 | self.assertEqual(memio.getvalue()[-3:], self.buftype("890")) |
| 268 | memio = self.ioclass(buf) |
| 269 | memio.close() |
| 270 | self.assertRaises(ValueError, memio.getvalue) |
| 271 | |
| 272 | def test_seek(self): |
| 273 | buf = self.buftype("1234567890") |
| 274 | memio = self.ioclass(buf) |
| 275 | |
| 276 | memio.read(5) |
| 277 | self.assertRaises(ValueError, memio.seek, -1) |
| 278 | self.assertRaises(ValueError, memio.seek, 1, -1) |
| 279 | self.assertRaises(ValueError, memio.seek, 1, 3) |
| 280 | self.assertEqual(memio.seek(0), 0) |
| 281 | self.assertEqual(memio.seek(0, 0), 0) |
| 282 | self.assertEqual(memio.read(), buf) |
| 283 | self.assertEqual(memio.seek(3), 3) |
| 284 | self.assertEqual(memio.seek(0, 1), 3) |
| 285 | self.assertEqual(memio.read(), buf[3:]) |
| 286 | self.assertEqual(memio.seek(len(buf)), len(buf)) |
| 287 | self.assertEqual(memio.read(), self.EOF) |
| 288 | memio.seek(len(buf) + 1) |
| 289 | self.assertEqual(memio.read(), self.EOF) |
| 290 | self.assertEqual(memio.seek(0, 2), len(buf)) |
| 291 | self.assertEqual(memio.read(), self.EOF) |
| 292 | memio.close() |
| 293 | self.assertRaises(ValueError, memio.seek, 0) |
| 294 | |
| 295 | def test_overseek(self): |
| 296 | buf = self.buftype("1234567890") |
| 297 | memio = self.ioclass(buf) |
| 298 | |
| 299 | self.assertEqual(memio.seek(len(buf) + 1), 11) |
| 300 | self.assertEqual(memio.read(), self.EOF) |
| 301 | self.assertEqual(memio.tell(), 11) |
| 302 | self.assertEqual(memio.getvalue(), buf) |
| 303 | memio.write(self.EOF) |
| 304 | self.assertEqual(memio.getvalue(), buf) |
| 305 | memio.write(buf) |
| 306 | self.assertEqual(memio.getvalue(), buf + self.buftype('\0') + buf) |
| 307 | |
| 308 | def test_tell(self): |
| 309 | buf = self.buftype("1234567890") |
| 310 | memio = self.ioclass(buf) |
| 311 | |
| 312 | self.assertEqual(memio.tell(), 0) |
| 313 | memio.seek(5) |
| 314 | self.assertEqual(memio.tell(), 5) |
| 315 | memio.seek(10000) |
| 316 | self.assertEqual(memio.tell(), 10000) |
| 317 | memio.close() |
| 318 | self.assertRaises(ValueError, memio.tell) |
| 319 | |
| 320 | def test_flush(self): |
| 321 | buf = self.buftype("1234567890") |
| 322 | memio = self.ioclass(buf) |
| 323 | |
| 324 | self.assertEqual(memio.flush(), None) |
| 325 | |
| 326 | def test_flags(self): |
| 327 | memio = self.ioclass() |
| 328 | |
| 329 | self.assertEqual(memio.writable(), True) |
| 330 | self.assertEqual(memio.readable(), True) |
| 331 | self.assertEqual(memio.seekable(), True) |
| 332 | self.assertEqual(memio.isatty(), False) |
| 333 | self.assertEqual(memio.closed, False) |
| 334 | memio.close() |
Antoine Pitrou | 1d85745 | 2012-09-05 20:11:49 +0200 | [diff] [blame] | 335 | self.assertRaises(ValueError, memio.writable) |
| 336 | self.assertRaises(ValueError, memio.readable) |
| 337 | self.assertRaises(ValueError, memio.seekable) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 338 | self.assertRaises(ValueError, memio.isatty) |
| 339 | self.assertEqual(memio.closed, True) |
| 340 | |
| 341 | def test_subclassing(self): |
| 342 | buf = self.buftype("1234567890") |
| 343 | def test1(): |
| 344 | class MemIO(self.ioclass): |
| 345 | pass |
| 346 | m = MemIO(buf) |
| 347 | return m.getvalue() |
| 348 | def test2(): |
| 349 | class MemIO(self.ioclass): |
| 350 | def __init__(me, a, b): |
| 351 | self.ioclass.__init__(me, a) |
| 352 | m = MemIO(buf, None) |
| 353 | return m.getvalue() |
| 354 | self.assertEqual(test1(), buf) |
| 355 | self.assertEqual(test2(), buf) |
| 356 | |
Alexandre Vassalotti | fc47704 | 2009-07-22 02:24:49 +0000 | [diff] [blame] | 357 | def test_instance_dict_leak(self): |
| 358 | # Test case for issue #6242. |
| 359 | # This will be caught by regrtest.py -R if this leak. |
| 360 | for _ in range(100): |
| 361 | memio = self.ioclass() |
| 362 | memio.foo = 1 |
| 363 | |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 364 | def test_pickling(self): |
| 365 | buf = self.buftype("1234567890") |
| 366 | memio = self.ioclass(buf) |
| 367 | memio.foo = 42 |
| 368 | memio.seek(2) |
| 369 | |
| 370 | class PickleTestMemIO(self.ioclass): |
| 371 | def __init__(me, initvalue, foo): |
| 372 | self.ioclass.__init__(me, initvalue) |
| 373 | me.foo = foo |
| 374 | # __getnewargs__ is undefined on purpose. This checks that PEP 307 |
| 375 | # is used to provide pickling support. |
| 376 | |
| 377 | # Pickle expects the class to be on the module level. Here we use a |
| 378 | # little hack to allow the PickleTestMemIO class to derive from |
Martin Panter | 46f5072 | 2016-05-26 05:35:26 +0000 | [diff] [blame^] | 379 | # self.ioclass without having to define all combinations explicitly on |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 380 | # the module-level. |
| 381 | import __main__ |
| 382 | PickleTestMemIO.__module__ = '__main__' |
Serhiy Storchaka | bad1257 | 2014-12-15 14:03:42 +0200 | [diff] [blame] | 383 | PickleTestMemIO.__qualname__ = PickleTestMemIO.__name__ |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 384 | __main__.PickleTestMemIO = PickleTestMemIO |
| 385 | submemio = PickleTestMemIO(buf, 80) |
| 386 | submemio.seek(2) |
| 387 | |
| 388 | # We only support pickle protocol 2 and onward since we use extended |
| 389 | # __reduce__ API of PEP 307 to provide pickling support. |
Serhiy Storchaka | bad1257 | 2014-12-15 14:03:42 +0200 | [diff] [blame] | 390 | for proto in range(2, pickle.HIGHEST_PROTOCOL + 1): |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 391 | for obj in (memio, submemio): |
| 392 | obj2 = pickle.loads(pickle.dumps(obj, protocol=proto)) |
| 393 | self.assertEqual(obj.getvalue(), obj2.getvalue()) |
| 394 | self.assertEqual(obj.__class__, obj2.__class__) |
| 395 | self.assertEqual(obj.foo, obj2.foo) |
| 396 | self.assertEqual(obj.tell(), obj2.tell()) |
Alexandre Vassalotti | 6eea818 | 2013-04-14 00:56:39 -0700 | [diff] [blame] | 397 | obj2.close() |
| 398 | self.assertRaises(ValueError, pickle.dumps, obj2, proto) |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 399 | del __main__.PickleTestMemIO |
| 400 | |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 401 | |
Antoine Pitrou | 972ee13 | 2010-09-06 18:48:21 +0000 | [diff] [blame] | 402 | class BytesIOMixin: |
| 403 | |
| 404 | def test_getbuffer(self): |
| 405 | memio = self.ioclass(b"1234567890") |
| 406 | buf = memio.getbuffer() |
| 407 | self.assertEqual(bytes(buf), b"1234567890") |
| 408 | memio.seek(5) |
| 409 | buf = memio.getbuffer() |
| 410 | self.assertEqual(bytes(buf), b"1234567890") |
| 411 | # Trying to change the size of the BytesIO while a buffer is exported |
| 412 | # raises a BufferError. |
| 413 | self.assertRaises(BufferError, memio.write, b'x' * 100) |
| 414 | self.assertRaises(BufferError, memio.truncate) |
Serhiy Storchaka | c057c38 | 2015-02-03 02:00:18 +0200 | [diff] [blame] | 415 | self.assertRaises(BufferError, memio.close) |
| 416 | self.assertFalse(memio.closed) |
Antoine Pitrou | 972ee13 | 2010-09-06 18:48:21 +0000 | [diff] [blame] | 417 | # Mutating the buffer updates the BytesIO |
| 418 | buf[3:6] = b"abc" |
| 419 | self.assertEqual(bytes(buf), b"123abc7890") |
| 420 | self.assertEqual(memio.getvalue(), b"123abc7890") |
Serhiy Storchaka | c057c38 | 2015-02-03 02:00:18 +0200 | [diff] [blame] | 421 | # After the buffer gets released, we can resize and close the BytesIO |
| 422 | # again |
Antoine Pitrou | 972ee13 | 2010-09-06 18:48:21 +0000 | [diff] [blame] | 423 | del buf |
| 424 | support.gc_collect() |
| 425 | memio.truncate() |
Serhiy Storchaka | c057c38 | 2015-02-03 02:00:18 +0200 | [diff] [blame] | 426 | memio.close() |
| 427 | self.assertRaises(ValueError, memio.getbuffer) |
Antoine Pitrou | 972ee13 | 2010-09-06 18:48:21 +0000 | [diff] [blame] | 428 | |
| 429 | |
| 430 | class PyBytesIOTest(MemoryTestMixin, MemorySeekTestMixin, |
| 431 | BytesIOMixin, unittest.TestCase): |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 432 | |
| 433 | UnsupportedOperation = pyio.UnsupportedOperation |
| 434 | |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 435 | @staticmethod |
| 436 | def buftype(s): |
| 437 | return s.encode("ascii") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 438 | ioclass = pyio.BytesIO |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 439 | EOF = b"" |
| 440 | |
| 441 | def test_read1(self): |
| 442 | buf = self.buftype("1234567890") |
| 443 | memio = self.ioclass(buf) |
| 444 | |
| 445 | self.assertRaises(TypeError, memio.read1) |
| 446 | self.assertEqual(memio.read(), buf) |
| 447 | |
| 448 | def test_readinto(self): |
| 449 | buf = self.buftype("1234567890") |
| 450 | memio = self.ioclass(buf) |
| 451 | |
| 452 | b = bytearray(b"hello") |
| 453 | self.assertEqual(memio.readinto(b), 5) |
| 454 | self.assertEqual(b, b"12345") |
| 455 | self.assertEqual(memio.readinto(b), 5) |
| 456 | self.assertEqual(b, b"67890") |
| 457 | self.assertEqual(memio.readinto(b), 0) |
| 458 | self.assertEqual(b, b"67890") |
| 459 | b = bytearray(b"hello world") |
| 460 | memio.seek(0) |
| 461 | self.assertEqual(memio.readinto(b), 10) |
| 462 | self.assertEqual(b, b"1234567890d") |
| 463 | b = bytearray(b"") |
| 464 | memio.seek(0) |
| 465 | self.assertEqual(memio.readinto(b), 0) |
| 466 | self.assertEqual(b, b"") |
| 467 | self.assertRaises(TypeError, memio.readinto, '') |
| 468 | import array |
| 469 | a = array.array('b', b"hello world") |
| 470 | memio = self.ioclass(buf) |
| 471 | memio.readinto(a) |
Antoine Pitrou | 1ce3eb5 | 2010-09-01 20:29:34 +0000 | [diff] [blame] | 472 | self.assertEqual(a.tobytes(), b"1234567890d") |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 473 | memio.close() |
| 474 | self.assertRaises(ValueError, memio.readinto, b) |
Benjamin Peterson | fa73555 | 2010-11-20 17:24:04 +0000 | [diff] [blame] | 475 | memio = self.ioclass(b"123") |
| 476 | b = bytearray() |
| 477 | memio.seek(42) |
| 478 | memio.readinto(b) |
| 479 | self.assertEqual(b, b"") |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 480 | |
| 481 | def test_relative_seek(self): |
| 482 | buf = self.buftype("1234567890") |
| 483 | memio = self.ioclass(buf) |
| 484 | |
| 485 | self.assertEqual(memio.seek(-1, 1), 0) |
| 486 | self.assertEqual(memio.seek(3, 1), 3) |
| 487 | self.assertEqual(memio.seek(-4, 1), 0) |
| 488 | self.assertEqual(memio.seek(-1, 2), 9) |
| 489 | self.assertEqual(memio.seek(1, 1), 10) |
| 490 | self.assertEqual(memio.seek(1, 2), 11) |
| 491 | memio.seek(-3, 2) |
| 492 | self.assertEqual(memio.read(), buf[-3:]) |
| 493 | memio.seek(0) |
| 494 | memio.seek(1, 1) |
| 495 | self.assertEqual(memio.read(), buf[1:]) |
| 496 | |
| 497 | def test_unicode(self): |
| 498 | memio = self.ioclass() |
| 499 | |
| 500 | self.assertRaises(TypeError, self.ioclass, "1234567890") |
| 501 | self.assertRaises(TypeError, memio.write, "1234567890") |
| 502 | self.assertRaises(TypeError, memio.writelines, ["1234567890"]) |
| 503 | |
| 504 | def test_bytes_array(self): |
| 505 | buf = b"1234567890" |
| 506 | import array |
| 507 | a = array.array('b', list(buf)) |
| 508 | memio = self.ioclass(a) |
| 509 | self.assertEqual(memio.getvalue(), buf) |
| 510 | self.assertEqual(memio.write(a), 10) |
| 511 | self.assertEqual(memio.getvalue(), buf) |
| 512 | |
Alexandre Vassalotti | ba5c743 | 2009-08-04 23:19:13 +0000 | [diff] [blame] | 513 | def test_issue5449(self): |
| 514 | buf = self.buftype("1234567890") |
| 515 | self.ioclass(initial_bytes=buf) |
| 516 | self.assertRaises(TypeError, self.ioclass, buf, foo=None) |
| 517 | |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 518 | |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 519 | class TextIOTestMixin: |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 520 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 521 | def test_newlines_property(self): |
| 522 | memio = self.ioclass(newline=None) |
| 523 | # The C StringIO decodes newlines in write() calls, but the Python |
| 524 | # implementation only does when reading. This function forces them to |
| 525 | # be decoded for testing. |
| 526 | def force_decode(): |
| 527 | memio.seek(0) |
| 528 | memio.read() |
| 529 | self.assertEqual(memio.newlines, None) |
| 530 | memio.write("a\n") |
| 531 | force_decode() |
| 532 | self.assertEqual(memio.newlines, "\n") |
| 533 | memio.write("b\r\n") |
| 534 | force_decode() |
| 535 | self.assertEqual(memio.newlines, ("\n", "\r\n")) |
| 536 | memio.write("c\rd") |
| 537 | force_decode() |
| 538 | self.assertEqual(memio.newlines, ("\r", "\n", "\r\n")) |
| 539 | |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 540 | def test_relative_seek(self): |
| 541 | memio = self.ioclass() |
| 542 | |
Andrew Svetlov | f7a17b4 | 2012-12-25 16:47:37 +0200 | [diff] [blame] | 543 | self.assertRaises(OSError, memio.seek, -1, 1) |
| 544 | self.assertRaises(OSError, memio.seek, 3, 1) |
| 545 | self.assertRaises(OSError, memio.seek, -3, 1) |
| 546 | self.assertRaises(OSError, memio.seek, -1, 2) |
| 547 | self.assertRaises(OSError, memio.seek, 1, 1) |
| 548 | self.assertRaises(OSError, memio.seek, 1, 2) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 549 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 550 | def test_textio_properties(self): |
| 551 | memio = self.ioclass() |
| 552 | |
| 553 | # These are just dummy values but we nevertheless check them for fear |
| 554 | # of unexpected breakage. |
Benjamin Peterson | 0926ad1 | 2009-06-06 18:02:12 +0000 | [diff] [blame] | 555 | self.assertIsNone(memio.encoding) |
| 556 | self.assertIsNone(memio.errors) |
| 557 | self.assertFalse(memio.line_buffering) |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 558 | |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 559 | def test_newline_default(self): |
| 560 | memio = self.ioclass("a\nb\r\nc\rd") |
| 561 | self.assertEqual(list(memio), ["a\n", "b\r\n", "c\rd"]) |
| 562 | self.assertEqual(memio.getvalue(), "a\nb\r\nc\rd") |
| 563 | |
| 564 | memio = self.ioclass() |
| 565 | self.assertEqual(memio.write("a\nb\r\nc\rd"), 8) |
| 566 | memio.seek(0) |
| 567 | self.assertEqual(list(memio), ["a\n", "b\r\n", "c\rd"]) |
| 568 | self.assertEqual(memio.getvalue(), "a\nb\r\nc\rd") |
| 569 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 570 | def test_newline_none(self): |
| 571 | # newline=None |
| 572 | memio = self.ioclass("a\nb\r\nc\rd", newline=None) |
| 573 | self.assertEqual(list(memio), ["a\n", "b\n", "c\n", "d"]) |
| 574 | memio.seek(0) |
| 575 | self.assertEqual(memio.read(1), "a") |
| 576 | self.assertEqual(memio.read(2), "\nb") |
| 577 | self.assertEqual(memio.read(2), "\nc") |
| 578 | self.assertEqual(memio.read(1), "\n") |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 579 | self.assertEqual(memio.getvalue(), "a\nb\nc\nd") |
| 580 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 581 | memio = self.ioclass(newline=None) |
| 582 | self.assertEqual(2, memio.write("a\n")) |
| 583 | self.assertEqual(3, memio.write("b\r\n")) |
| 584 | self.assertEqual(3, memio.write("c\rd")) |
| 585 | memio.seek(0) |
| 586 | self.assertEqual(memio.read(), "a\nb\nc\nd") |
Antoine Pitrou | 57839a6 | 2014-02-02 23:37:29 +0100 | [diff] [blame] | 587 | self.assertEqual(memio.getvalue(), "a\nb\nc\nd") |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 588 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 589 | memio = self.ioclass("a\r\nb", newline=None) |
| 590 | self.assertEqual(memio.read(3), "a\nb") |
| 591 | |
| 592 | def test_newline_empty(self): |
| 593 | # newline="" |
| 594 | memio = self.ioclass("a\nb\r\nc\rd", newline="") |
| 595 | self.assertEqual(list(memio), ["a\n", "b\r\n", "c\r", "d"]) |
| 596 | memio.seek(0) |
| 597 | self.assertEqual(memio.read(4), "a\nb\r") |
| 598 | self.assertEqual(memio.read(2), "\nc") |
| 599 | self.assertEqual(memio.read(1), "\r") |
Antoine Pitrou | 57839a6 | 2014-02-02 23:37:29 +0100 | [diff] [blame] | 600 | self.assertEqual(memio.getvalue(), "a\nb\r\nc\rd") |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 601 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 602 | memio = self.ioclass(newline="") |
| 603 | self.assertEqual(2, memio.write("a\n")) |
| 604 | self.assertEqual(2, memio.write("b\r")) |
| 605 | self.assertEqual(2, memio.write("\nc")) |
| 606 | self.assertEqual(2, memio.write("\rd")) |
| 607 | memio.seek(0) |
| 608 | self.assertEqual(list(memio), ["a\n", "b\r\n", "c\r", "d"]) |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 609 | self.assertEqual(memio.getvalue(), "a\nb\r\nc\rd") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 610 | |
| 611 | def test_newline_lf(self): |
| 612 | # newline="\n" |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 613 | memio = self.ioclass("a\nb\r\nc\rd", newline="\n") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 614 | self.assertEqual(list(memio), ["a\n", "b\r\n", "c\rd"]) |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 615 | self.assertEqual(memio.getvalue(), "a\nb\r\nc\rd") |
| 616 | |
| 617 | memio = self.ioclass(newline="\n") |
| 618 | self.assertEqual(memio.write("a\nb\r\nc\rd"), 8) |
| 619 | memio.seek(0) |
| 620 | self.assertEqual(list(memio), ["a\n", "b\r\n", "c\rd"]) |
| 621 | self.assertEqual(memio.getvalue(), "a\nb\r\nc\rd") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 622 | |
| 623 | def test_newline_cr(self): |
| 624 | # newline="\r" |
| 625 | memio = self.ioclass("a\nb\r\nc\rd", newline="\r") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 626 | self.assertEqual(memio.read(), "a\rb\r\rc\rd") |
| 627 | memio.seek(0) |
| 628 | self.assertEqual(list(memio), ["a\r", "b\r", "\r", "c\r", "d"]) |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 629 | self.assertEqual(memio.getvalue(), "a\rb\r\rc\rd") |
| 630 | |
| 631 | memio = self.ioclass(newline="\r") |
| 632 | self.assertEqual(memio.write("a\nb\r\nc\rd"), 8) |
| 633 | memio.seek(0) |
| 634 | self.assertEqual(list(memio), ["a\r", "b\r", "\r", "c\r", "d"]) |
Antoine Pitrou | 57839a6 | 2014-02-02 23:37:29 +0100 | [diff] [blame] | 635 | memio.seek(0) |
| 636 | self.assertEqual(memio.readlines(), ["a\r", "b\r", "\r", "c\r", "d"]) |
| 637 | self.assertEqual(memio.getvalue(), "a\rb\r\rc\rd") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 638 | |
| 639 | def test_newline_crlf(self): |
| 640 | # newline="\r\n" |
| 641 | memio = self.ioclass("a\nb\r\nc\rd", newline="\r\n") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 642 | self.assertEqual(memio.read(), "a\r\nb\r\r\nc\rd") |
| 643 | memio.seek(0) |
| 644 | self.assertEqual(list(memio), ["a\r\n", "b\r\r\n", "c\rd"]) |
Antoine Pitrou | 57839a6 | 2014-02-02 23:37:29 +0100 | [diff] [blame] | 645 | memio.seek(0) |
| 646 | self.assertEqual(memio.readlines(), ["a\r\n", "b\r\r\n", "c\rd"]) |
| 647 | self.assertEqual(memio.getvalue(), "a\r\nb\r\r\nc\rd") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 648 | |
Serhiy Storchaka | 1812bd4 | 2014-02-05 13:42:01 +0200 | [diff] [blame] | 649 | memio = self.ioclass(newline="\r\n") |
| 650 | self.assertEqual(memio.write("a\nb\r\nc\rd"), 8) |
| 651 | memio.seek(0) |
| 652 | self.assertEqual(list(memio), ["a\r\n", "b\r\r\n", "c\rd"]) |
| 653 | self.assertEqual(memio.getvalue(), "a\r\nb\r\r\nc\rd") |
| 654 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 655 | def test_issue5265(self): |
| 656 | # StringIO can duplicate newlines in universal newlines mode |
| 657 | memio = self.ioclass("a\r\nb\r\n", newline=None) |
| 658 | self.assertEqual(memio.read(5), "a\nb\n") |
Antoine Pitrou | 57839a6 | 2014-02-02 23:37:29 +0100 | [diff] [blame] | 659 | self.assertEqual(memio.getvalue(), "a\nb\n") |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 660 | |
Alexandre Vassalotti | d2bb18b | 2009-07-22 03:07:33 +0000 | [diff] [blame] | 661 | def test_newline_argument(self): |
| 662 | self.assertRaises(TypeError, self.ioclass, newline=b"\n") |
| 663 | self.assertRaises(ValueError, self.ioclass, newline="error") |
| 664 | # These should not raise an error |
| 665 | for newline in (None, "", "\n", "\r", "\r\n"): |
| 666 | self.ioclass(newline=newline) |
| 667 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 668 | |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 669 | class PyStringIOTest(MemoryTestMixin, MemorySeekTestMixin, |
| 670 | TextIOTestMixin, unittest.TestCase): |
| 671 | buftype = str |
| 672 | ioclass = pyio.StringIO |
| 673 | UnsupportedOperation = pyio.UnsupportedOperation |
| 674 | EOF = "" |
| 675 | |
Serhiy Storchaka | c92ea76 | 2014-01-29 11:33:26 +0200 | [diff] [blame] | 676 | def test_lone_surrogates(self): |
| 677 | # Issue #20424 |
| 678 | memio = self.ioclass('\ud800') |
| 679 | self.assertEqual(memio.read(), '\ud800') |
| 680 | |
| 681 | memio = self.ioclass() |
| 682 | memio.write('\ud800') |
| 683 | self.assertEqual(memio.getvalue(), '\ud800') |
| 684 | |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 685 | |
| 686 | class PyStringIOPickleTest(TextIOTestMixin, unittest.TestCase): |
| 687 | """Test if pickle restores properly the internal state of StringIO. |
| 688 | """ |
| 689 | buftype = str |
| 690 | UnsupportedOperation = pyio.UnsupportedOperation |
| 691 | EOF = "" |
| 692 | |
| 693 | class ioclass(pyio.StringIO): |
| 694 | def __new__(cls, *args, **kwargs): |
| 695 | return pickle.loads(pickle.dumps(pyio.StringIO(*args, **kwargs))) |
| 696 | def __init__(self, *args, **kwargs): |
| 697 | pass |
| 698 | |
| 699 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 700 | class CBytesIOTest(PyBytesIOTest): |
| 701 | ioclass = io.BytesIO |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 702 | UnsupportedOperation = io.UnsupportedOperation |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 703 | |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 704 | def test_getstate(self): |
| 705 | memio = self.ioclass() |
| 706 | state = memio.__getstate__() |
| 707 | self.assertEqual(len(state), 3) |
| 708 | bytearray(state[0]) # Check if state[0] supports the buffer interface. |
Ezio Melotti | e961593 | 2010-01-24 19:26:24 +0000 | [diff] [blame] | 709 | self.assertIsInstance(state[1], int) |
Serhiy Storchaka | 0dcd80a | 2015-08-02 15:17:49 +0300 | [diff] [blame] | 710 | if state[2] is not None: |
| 711 | self.assertIsInstance(state[2], dict) |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 712 | memio.close() |
| 713 | self.assertRaises(ValueError, memio.__getstate__) |
| 714 | |
| 715 | def test_setstate(self): |
| 716 | # This checks whether __setstate__ does proper input validation. |
| 717 | memio = self.ioclass() |
| 718 | memio.__setstate__((b"no error", 0, None)) |
| 719 | memio.__setstate__((bytearray(b"no error"), 0, None)) |
| 720 | memio.__setstate__((b"no error", 0, {'spam': 3})) |
| 721 | self.assertRaises(ValueError, memio.__setstate__, (b"", -1, None)) |
| 722 | self.assertRaises(TypeError, memio.__setstate__, ("unicode", 0, None)) |
| 723 | self.assertRaises(TypeError, memio.__setstate__, (b"", 0.0, None)) |
| 724 | self.assertRaises(TypeError, memio.__setstate__, (b"", 0, 0)) |
| 725 | self.assertRaises(TypeError, memio.__setstate__, (b"len-test", 0)) |
| 726 | self.assertRaises(TypeError, memio.__setstate__) |
| 727 | self.assertRaises(TypeError, memio.__setstate__, 0) |
| 728 | memio.close() |
| 729 | self.assertRaises(ValueError, memio.__setstate__, (b"closed", 0, None)) |
| 730 | |
Antoine Pitrou | 8f328d0 | 2012-07-30 00:01:06 +0200 | [diff] [blame] | 731 | check_sizeof = support.check_sizeof |
| 732 | |
| 733 | @support.cpython_only |
| 734 | def test_sizeof(self): |
Serhiy Storchaka | 87d0b45 | 2015-02-03 11:30:10 +0200 | [diff] [blame] | 735 | basesize = support.calcobjsize('P2n2Pn') |
Antoine Pitrou | 8f328d0 | 2012-07-30 00:01:06 +0200 | [diff] [blame] | 736 | check = self.check_sizeof |
| 737 | self.assertEqual(object.__sizeof__(io.BytesIO()), basesize) |
| 738 | check(io.BytesIO(), basesize ) |
Serhiy Storchaka | 87d0b45 | 2015-02-03 11:30:10 +0200 | [diff] [blame] | 739 | check(io.BytesIO(b'a' * 1000), basesize + sys.getsizeof(b'a' * 1000)) |
Antoine Pitrou | cc66a73 | 2014-07-29 19:41:11 -0400 | [diff] [blame] | 740 | |
| 741 | # Various tests of copy-on-write behaviour for BytesIO. |
| 742 | |
| 743 | def _test_cow_mutation(self, mutation): |
| 744 | # Common code for all BytesIO copy-on-write mutation tests. |
| 745 | imm = b' ' * 1024 |
| 746 | old_rc = sys.getrefcount(imm) |
| 747 | memio = self.ioclass(imm) |
| 748 | self.assertEqual(sys.getrefcount(imm), old_rc + 1) |
| 749 | mutation(memio) |
| 750 | self.assertEqual(sys.getrefcount(imm), old_rc) |
| 751 | |
| 752 | @support.cpython_only |
| 753 | def test_cow_truncate(self): |
| 754 | # Ensure truncate causes a copy. |
| 755 | def mutation(memio): |
| 756 | memio.truncate(1) |
| 757 | self._test_cow_mutation(mutation) |
| 758 | |
| 759 | @support.cpython_only |
| 760 | def test_cow_write(self): |
| 761 | # Ensure write that would not cause a resize still results in a copy. |
| 762 | def mutation(memio): |
| 763 | memio.seek(0) |
| 764 | memio.write(b'foo') |
| 765 | self._test_cow_mutation(mutation) |
| 766 | |
| 767 | @support.cpython_only |
| 768 | def test_cow_setstate(self): |
| 769 | # __setstate__ should cause buffer to be released. |
| 770 | memio = self.ioclass(b'foooooo') |
| 771 | state = memio.__getstate__() |
| 772 | def mutation(memio): |
| 773 | memio.__setstate__(state) |
| 774 | self._test_cow_mutation(mutation) |
| 775 | |
| 776 | @support.cpython_only |
| 777 | def test_cow_mutable(self): |
| 778 | # BytesIO should accept only Bytes for copy-on-write sharing, since |
| 779 | # arbitrary buffer-exporting objects like bytearray() aren't guaranteed |
| 780 | # to be immutable. |
| 781 | ba = bytearray(1024) |
| 782 | old_rc = sys.getrefcount(ba) |
| 783 | memio = self.ioclass(ba) |
| 784 | self.assertEqual(sys.getrefcount(ba), old_rc) |
Antoine Pitrou | 8f328d0 | 2012-07-30 00:01:06 +0200 | [diff] [blame] | 785 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 786 | class CStringIOTest(PyStringIOTest): |
| 787 | ioclass = io.StringIO |
Benjamin Peterson | d2e0c79 | 2009-05-01 20:40:59 +0000 | [diff] [blame] | 788 | UnsupportedOperation = io.UnsupportedOperation |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 789 | |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 790 | # XXX: For the Python version of io.StringIO, this is highly |
| 791 | # dependent on the encoding used for the underlying buffer. |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 792 | def test_widechar(self): |
| 793 | buf = self.buftype("\U0002030a\U00020347") |
| 794 | memio = self.ioclass(buf) |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 795 | |
Benjamin Peterson | 4fa88fa | 2009-03-04 00:14:51 +0000 | [diff] [blame] | 796 | self.assertEqual(memio.getvalue(), buf) |
| 797 | self.assertEqual(memio.write(buf), len(buf)) |
| 798 | self.assertEqual(memio.tell(), len(buf)) |
| 799 | self.assertEqual(memio.getvalue(), buf) |
| 800 | self.assertEqual(memio.write(buf), len(buf)) |
| 801 | self.assertEqual(memio.tell(), len(buf) * 2) |
| 802 | self.assertEqual(memio.getvalue(), buf + buf) |
Alexandre Vassalotti | 794652d | 2008-06-11 22:58:36 +0000 | [diff] [blame] | 803 | |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 804 | def test_getstate(self): |
| 805 | memio = self.ioclass() |
| 806 | state = memio.__getstate__() |
| 807 | self.assertEqual(len(state), 4) |
Ezio Melotti | e961593 | 2010-01-24 19:26:24 +0000 | [diff] [blame] | 808 | self.assertIsInstance(state[0], str) |
| 809 | self.assertIsInstance(state[1], str) |
| 810 | self.assertIsInstance(state[2], int) |
Serhiy Storchaka | 0dcd80a | 2015-08-02 15:17:49 +0300 | [diff] [blame] | 811 | if state[3] is not None: |
| 812 | self.assertIsInstance(state[3], dict) |
Alexandre Vassalotti | cf76e1a | 2009-07-22 03:24:36 +0000 | [diff] [blame] | 813 | memio.close() |
| 814 | self.assertRaises(ValueError, memio.__getstate__) |
| 815 | |
| 816 | def test_setstate(self): |
| 817 | # This checks whether __setstate__ does proper input validation. |
| 818 | memio = self.ioclass() |
| 819 | memio.__setstate__(("no error", "\n", 0, None)) |
| 820 | memio.__setstate__(("no error", "", 0, {'spam': 3})) |
| 821 | self.assertRaises(ValueError, memio.__setstate__, ("", "f", 0, None)) |
| 822 | self.assertRaises(ValueError, memio.__setstate__, ("", "", -1, None)) |
| 823 | self.assertRaises(TypeError, memio.__setstate__, (b"", "", 0, None)) |
| 824 | self.assertRaises(TypeError, memio.__setstate__, ("", b"", 0, None)) |
| 825 | self.assertRaises(TypeError, memio.__setstate__, ("", "", 0.0, None)) |
| 826 | self.assertRaises(TypeError, memio.__setstate__, ("", "", 0, 0)) |
| 827 | self.assertRaises(TypeError, memio.__setstate__, ("len-test", 0)) |
| 828 | self.assertRaises(TypeError, memio.__setstate__) |
| 829 | self.assertRaises(TypeError, memio.__setstate__, 0) |
| 830 | memio.close() |
| 831 | self.assertRaises(ValueError, memio.__setstate__, ("closed", "", 0, None)) |
| 832 | |
| 833 | |
| 834 | class CStringIOPickleTest(PyStringIOPickleTest): |
| 835 | UnsupportedOperation = io.UnsupportedOperation |
| 836 | |
| 837 | class ioclass(io.StringIO): |
| 838 | def __new__(cls, *args, **kwargs): |
| 839 | return pickle.loads(pickle.dumps(io.StringIO(*args, **kwargs))) |
| 840 | def __init__(self, *args, **kwargs): |
| 841 | pass |
| 842 | |
Alexandre Vassalotti | 794652d | 2008-06-11 22:58:36 +0000 | [diff] [blame] | 843 | |
Alexandre Vassalotti | 77250f4 | 2008-05-06 19:48:38 +0000 | [diff] [blame] | 844 | if __name__ == '__main__': |
Zachary Ware | 38c707e | 2015-04-13 15:00:43 -0500 | [diff] [blame] | 845 | unittest.main() |