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Side by Side Diff: Lib/test/test_range.py

Issue 28376: assertion failure in rangeobject.c
Patch Set: Created 3 years, 7 months ago
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1 # Python test set -- built-in functions 1 # Python test set -- built-in functions
2 2
3 import unittest 3 import unittest
4 import sys 4 import sys
5 import pickle 5 import pickle
6 import itertools 6 import itertools
7 import test.support
7 8
8 # pure Python implementations (3 args only), for comparison 9 # pure Python implementations (3 args only), for comparison
9 def pyrange(start, stop, step): 10 def pyrange(start, stop, step):
10 if (start - stop) // step < 0: 11 if (start - stop) // step < 0:
11 # replace stop with next element in the sequence of integers 12 # replace stop with next element in the sequence of integers
12 # that are congruent to start modulo step. 13 # that are congruent to start modulo step.
13 stop += (start - stop) % step 14 stop += (start - stop) % step
14 while start != stop: 15 while start != stop:
15 yield start 16 yield start
16 start += step 17 start += step
(...skipping 468 matching lines...) Expand 10 before | Expand all | Expand 10 after
485 iter1 = range(start, end, step) 486 iter1 = range(start, end, step)
486 iter2 = pyrange(start, end, step) 487 iter2 = pyrange(start, end, step)
487 test_id = "range({}, {}, {})".format(start, end, step) 488 test_id = "range({}, {}, {})".format(start, end, step)
488 # check first 100 entries 489 # check first 100 entries
489 self.assert_iterators_equal(iter1, iter2, test_id, limit=100) 490 self.assert_iterators_equal(iter1, iter2, test_id, limit=100)
490 491
491 iter1 = reversed(range(start, end, step)) 492 iter1 = reversed(range(start, end, step))
492 iter2 = pyrange_reversed(start, end, step) 493 iter2 = pyrange_reversed(start, end, step)
493 test_id = "reversed(range({}, {}, {}))".format(start, end, step) 494 test_id = "reversed(range({}, {}, {}))".format(start, end, step)
494 self.assert_iterators_equal(iter1, iter2, test_id, limit=100) 495 self.assert_iterators_equal(iter1, iter2, test_id, limit=100)
496
497 @test.support.cpython_only
498 def test_range_iterator_invocation(self):
499 import _testcapi
500 rangeiter_type = type(iter(range(0)))
501
502 self.assertWarns(DeprecationWarning, rangeiter_type, 1, 3, 1)
503
504 with test.support.check_warnings(('', DeprecationWarning)):
505 # rangeiter_new doesn't take keyword arguments
506 with self.assertRaises(TypeError):
507 rangeiter_type(a=1)
508
509 # rangeiter_new takes exactly 3 arguments
510 self.assertRaises(TypeError, rangeiter_type)
511 self.assertRaises(TypeError, rangeiter_type, 1)
512 self.assertRaises(TypeError, rangeiter_type, 1, 1)
513 self.assertRaises(TypeError, rangeiter_type, 1, 1, 1, 1)
514
515 # start, stop and stop must fit in C long
516 for good_val in [_testcapi.LONG_MAX, _testcapi.LONG_MIN]:
517 rangeiter_type(good_val, good_val, good_val)
518 for bad_val in [_testcapi.LONG_MAX + 1, _testcapi.LONG_MIN - 1]:
519 self.assertRaises(OverflowError,
520 rangeiter_type, bad_val, 1, 1)
521 self.assertRaises(OverflowError,
522 rangeiter_type, 1, bad_val, 1)
523 self.assertRaises(OverflowError,
524 rangeiter_type, 1, 1, bad_val)
525
526 # step mustn't be zero
527 self.assertRaises(ValueError, rangeiter_type, 1, 1, 0)
495 528
496 def test_slice(self): 529 def test_slice(self):
497 def check(start, stop, step=None): 530 def check(start, stop, step=None):
498 i = slice(start, stop, step) 531 i = slice(start, stop, step)
499 self.assertEqual(list(r[i]), list(r)[i]) 532 self.assertEqual(list(r[i]), list(r)[i])
500 self.assertEqual(len(r[i]), len(list(r)[i])) 533 self.assertEqual(len(r[i]), len(list(r)[i]))
501 for r in [range(10), 534 for r in [range(10),
502 range(0), 535 range(0),
503 range(1, 9, 3), 536 range(1, 9, 3),
504 range(8, 0, -3), 537 range(8, 0, -3),
(...skipping 137 matching lines...) Expand 10 before | Expand all | Expand 10 after
642 675
643 with self.assertRaises(AttributeError): 676 with self.assertRaises(AttributeError):
644 del rangeobj.start 677 del rangeobj.start
645 with self.assertRaises(AttributeError): 678 with self.assertRaises(AttributeError):
646 del rangeobj.stop 679 del rangeobj.stop
647 with self.assertRaises(AttributeError): 680 with self.assertRaises(AttributeError):
648 del rangeobj.step 681 del rangeobj.step
649 682
650 if __name__ == "__main__": 683 if __name__ == "__main__":
651 unittest.main() 684 unittest.main()
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