/usr/lib/python3.7/test/test_raise.py is in libpython3.7-testsuite 3.7.0~b3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 | # Copyright 2007 Google, Inc. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.
"""Tests for the raise statement."""
from test import support
import sys
import types
import unittest
def get_tb():
try:
raise OSError()
except:
return sys.exc_info()[2]
class Context:
def __enter__(self):
return self
def __exit__(self, exc_type, exc_value, exc_tb):
return True
class TestRaise(unittest.TestCase):
def test_invalid_reraise(self):
try:
raise
except RuntimeError as e:
self.assertIn("No active exception", str(e))
else:
self.fail("No exception raised")
def test_reraise(self):
try:
try:
raise IndexError()
except IndexError as e:
exc1 = e
raise
except IndexError as exc2:
self.assertIs(exc1, exc2)
else:
self.fail("No exception raised")
def test_except_reraise(self):
def reraise():
try:
raise TypeError("foo")
except:
try:
raise KeyError("caught")
except KeyError:
pass
raise
self.assertRaises(TypeError, reraise)
def test_finally_reraise(self):
def reraise():
try:
raise TypeError("foo")
except:
try:
raise KeyError("caught")
finally:
raise
self.assertRaises(KeyError, reraise)
def test_nested_reraise(self):
def nested_reraise():
raise
def reraise():
try:
raise TypeError("foo")
except:
nested_reraise()
self.assertRaises(TypeError, reraise)
def test_raise_from_None(self):
try:
try:
raise TypeError("foo")
except:
raise ValueError() from None
except ValueError as e:
self.assertIsInstance(e.__context__, TypeError)
self.assertIsNone(e.__cause__)
def test_with_reraise1(self):
def reraise():
try:
raise TypeError("foo")
except:
with Context():
pass
raise
self.assertRaises(TypeError, reraise)
def test_with_reraise2(self):
def reraise():
try:
raise TypeError("foo")
except:
with Context():
raise KeyError("caught")
raise
self.assertRaises(TypeError, reraise)
def test_yield_reraise(self):
def reraise():
try:
raise TypeError("foo")
except:
yield 1
raise
g = reraise()
next(g)
self.assertRaises(TypeError, lambda: next(g))
self.assertRaises(StopIteration, lambda: next(g))
def test_erroneous_exception(self):
class MyException(Exception):
def __init__(self):
raise RuntimeError()
try:
raise MyException
except RuntimeError:
pass
else:
self.fail("No exception raised")
def test_new_returns_invalid_instance(self):
# See issue #11627.
class MyException(Exception):
def __new__(cls, *args):
return object()
with self.assertRaises(TypeError):
raise MyException
def test_assert_with_tuple_arg(self):
try:
assert False, (3,)
except AssertionError as e:
self.assertEqual(str(e), "(3,)")
class TestCause(unittest.TestCase):
def testCauseSyntax(self):
try:
try:
try:
raise TypeError
except Exception:
raise ValueError from None
except ValueError as exc:
self.assertIsNone(exc.__cause__)
self.assertTrue(exc.__suppress_context__)
exc.__suppress_context__ = False
raise exc
except ValueError as exc:
e = exc
self.assertIsNone(e.__cause__)
self.assertFalse(e.__suppress_context__)
self.assertIsInstance(e.__context__, TypeError)
def test_invalid_cause(self):
try:
raise IndexError from 5
except TypeError as e:
self.assertIn("exception cause", str(e))
else:
self.fail("No exception raised")
def test_class_cause(self):
try:
raise IndexError from KeyError
except IndexError as e:
self.assertIsInstance(e.__cause__, KeyError)
else:
self.fail("No exception raised")
def test_instance_cause(self):
cause = KeyError()
try:
raise IndexError from cause
except IndexError as e:
self.assertIs(e.__cause__, cause)
else:
self.fail("No exception raised")
def test_erroneous_cause(self):
class MyException(Exception):
def __init__(self):
raise RuntimeError()
try:
raise IndexError from MyException
except RuntimeError:
pass
else:
self.fail("No exception raised")
class TestTraceback(unittest.TestCase):
def test_sets_traceback(self):
try:
raise IndexError()
except IndexError as e:
self.assertIsInstance(e.__traceback__, types.TracebackType)
else:
self.fail("No exception raised")
def test_accepts_traceback(self):
tb = get_tb()
try:
raise IndexError().with_traceback(tb)
except IndexError as e:
self.assertNotEqual(e.__traceback__, tb)
self.assertEqual(e.__traceback__.tb_next, tb)
else:
self.fail("No exception raised")
class TestTracebackType(unittest.TestCase):
def raiser(self):
raise ValueError
def test_attrs(self):
try:
self.raiser()
except Exception as exc:
tb = exc.__traceback__
self.assertIsInstance(tb.tb_next, types.TracebackType)
self.assertIs(tb.tb_frame, sys._getframe())
self.assertIsInstance(tb.tb_lasti, int)
self.assertIsInstance(tb.tb_lineno, int)
self.assertIs(tb.tb_next.tb_next, None)
# Invalid assignments
with self.assertRaises(TypeError):
del tb.tb_next
with self.assertRaises(TypeError):
tb.tb_next = "asdf"
# Loops
with self.assertRaises(ValueError):
tb.tb_next = tb
with self.assertRaises(ValueError):
tb.tb_next.tb_next = tb
# Valid assignments
tb.tb_next = None
self.assertIs(tb.tb_next, None)
new_tb = get_tb()
tb.tb_next = new_tb
self.assertIs(tb.tb_next, new_tb)
def test_constructor(self):
other_tb = get_tb()
frame = sys._getframe()
tb = types.TracebackType(other_tb, frame, 1, 2)
self.assertEqual(tb.tb_next, other_tb)
self.assertEqual(tb.tb_frame, frame)
self.assertEqual(tb.tb_lasti, 1)
self.assertEqual(tb.tb_lineno, 2)
tb = types.TracebackType(None, frame, 1, 2)
self.assertEqual(tb.tb_next, None)
with self.assertRaises(TypeError):
types.TracebackType("no", frame, 1, 2)
with self.assertRaises(TypeError):
types.TracebackType(other_tb, "no", 1, 2)
with self.assertRaises(TypeError):
types.TracebackType(other_tb, frame, "no", 2)
with self.assertRaises(TypeError):
types.TracebackType(other_tb, frame, 1, "nuh-uh")
class TestContext(unittest.TestCase):
def test_instance_context_instance_raise(self):
context = IndexError()
try:
try:
raise context
except:
raise OSError()
except OSError as e:
self.assertEqual(e.__context__, context)
else:
self.fail("No exception raised")
def test_class_context_instance_raise(self):
context = IndexError
try:
try:
raise context
except:
raise OSError()
except OSError as e:
self.assertNotEqual(e.__context__, context)
self.assertIsInstance(e.__context__, context)
else:
self.fail("No exception raised")
def test_class_context_class_raise(self):
context = IndexError
try:
try:
raise context
except:
raise OSError
except OSError as e:
self.assertNotEqual(e.__context__, context)
self.assertIsInstance(e.__context__, context)
else:
self.fail("No exception raised")
def test_c_exception_context(self):
try:
try:
1/0
except:
raise OSError
except OSError as e:
self.assertIsInstance(e.__context__, ZeroDivisionError)
else:
self.fail("No exception raised")
def test_c_exception_raise(self):
try:
try:
1/0
except:
xyzzy
except NameError as e:
self.assertIsInstance(e.__context__, ZeroDivisionError)
else:
self.fail("No exception raised")
def test_noraise_finally(self):
try:
try:
pass
finally:
raise OSError
except OSError as e:
self.assertIsNone(e.__context__)
else:
self.fail("No exception raised")
def test_raise_finally(self):
try:
try:
1/0
finally:
raise OSError
except OSError as e:
self.assertIsInstance(e.__context__, ZeroDivisionError)
else:
self.fail("No exception raised")
def test_context_manager(self):
class ContextManager:
def __enter__(self):
pass
def __exit__(self, t, v, tb):
xyzzy
try:
with ContextManager():
1/0
except NameError as e:
self.assertIsInstance(e.__context__, ZeroDivisionError)
else:
self.fail("No exception raised")
def test_cycle_broken(self):
# Self-cycles (when re-raising a caught exception) are broken
try:
try:
1/0
except ZeroDivisionError as e:
raise e
except ZeroDivisionError as e:
self.assertIsNone(e.__context__)
def test_reraise_cycle_broken(self):
# Non-trivial context cycles (through re-raising a previous exception)
# are broken too.
try:
try:
xyzzy
except NameError as a:
try:
1/0
except ZeroDivisionError:
raise a
except NameError as e:
self.assertIsNone(e.__context__.__context__)
def test_3118(self):
# deleting the generator caused the __context__ to be cleared
def gen():
try:
yield 1
finally:
pass
def f():
g = gen()
next(g)
try:
try:
raise ValueError
except:
del g
raise KeyError
except Exception as e:
self.assertIsInstance(e.__context__, ValueError)
f()
def test_3611(self):
# A re-raised exception in a __del__ caused the __context__
# to be cleared
class C:
def __del__(self):
try:
1/0
except:
raise
def f():
x = C()
try:
try:
x.x
except AttributeError:
del x
raise TypeError
except Exception as e:
self.assertNotEqual(e.__context__, None)
self.assertIsInstance(e.__context__, AttributeError)
with support.captured_output("stderr"):
f()
class TestRemovedFunctionality(unittest.TestCase):
def test_tuples(self):
try:
raise (IndexError, KeyError) # This should be a tuple!
except TypeError:
pass
else:
self.fail("No exception raised")
def test_strings(self):
try:
raise "foo"
except TypeError:
pass
else:
self.fail("No exception raised")
if __name__ == "__main__":
unittest.main()
|