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370 lines
14 KiB
370 lines
14 KiB
from __future__ import absolute_import
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import sys
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import unittest
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from test import test_support
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from UserList import UserList
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# We do a bit of trickery here to be able to test both the C implementation
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# and the Python implementation of the module.
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# Make it impossible to import the C implementation anymore.
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sys.modules['_bisect'] = 0
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# We must also handle the case that bisect was imported before.
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if 'bisect' in sys.modules:
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del sys.modules['bisect']
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# Now we can import the module and get the pure Python implementation.
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import bisect as py_bisect
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# Restore everything to normal.
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del sys.modules['_bisect']
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del sys.modules['bisect']
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# This is now the module with the C implementation.
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import bisect as c_bisect
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class Range(object):
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"""A trivial xrange()-like object without any integer width limitations."""
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def __init__(self, start, stop):
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self.start = start
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self.stop = stop
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self.last_insert = None
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def __len__(self):
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return self.stop - self.start
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def __getitem__(self, idx):
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n = self.stop - self.start
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if idx < 0:
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idx += n
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if idx >= n:
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raise IndexError(idx)
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return self.start + idx
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def insert(self, idx, item):
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self.last_insert = idx, item
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class TestBisect(unittest.TestCase):
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module = None
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def setUp(self):
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self.precomputedCases = [
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(self.module.bisect_right, [], 1, 0),
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(self.module.bisect_right, [1], 0, 0),
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(self.module.bisect_right, [1], 1, 1),
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(self.module.bisect_right, [1], 2, 1),
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(self.module.bisect_right, [1, 1], 0, 0),
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(self.module.bisect_right, [1, 1], 1, 2),
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(self.module.bisect_right, [1, 1], 2, 2),
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(self.module.bisect_right, [1, 1, 1], 0, 0),
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(self.module.bisect_right, [1, 1, 1], 1, 3),
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(self.module.bisect_right, [1, 1, 1], 2, 3),
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(self.module.bisect_right, [1, 1, 1, 1], 0, 0),
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(self.module.bisect_right, [1, 1, 1, 1], 1, 4),
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(self.module.bisect_right, [1, 1, 1, 1], 2, 4),
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(self.module.bisect_right, [1, 2], 0, 0),
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(self.module.bisect_right, [1, 2], 1, 1),
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(self.module.bisect_right, [1, 2], 1.5, 1),
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(self.module.bisect_right, [1, 2], 2, 2),
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(self.module.bisect_right, [1, 2], 3, 2),
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(self.module.bisect_right, [1, 1, 2, 2], 0, 0),
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(self.module.bisect_right, [1, 1, 2, 2], 1, 2),
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(self.module.bisect_right, [1, 1, 2, 2], 1.5, 2),
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(self.module.bisect_right, [1, 1, 2, 2], 2, 4),
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(self.module.bisect_right, [1, 1, 2, 2], 3, 4),
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(self.module.bisect_right, [1, 2, 3], 0, 0),
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(self.module.bisect_right, [1, 2, 3], 1, 1),
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(self.module.bisect_right, [1, 2, 3], 1.5, 1),
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(self.module.bisect_right, [1, 2, 3], 2, 2),
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(self.module.bisect_right, [1, 2, 3], 2.5, 2),
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(self.module.bisect_right, [1, 2, 3], 3, 3),
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(self.module.bisect_right, [1, 2, 3], 4, 3),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 0, 0),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 1, 1),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 1.5, 1),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 2, 3),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 2.5, 3),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 3, 6),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 3.5, 6),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 4, 10),
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(self.module.bisect_right, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 5, 10),
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(self.module.bisect_left, [], 1, 0),
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(self.module.bisect_left, [1], 0, 0),
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(self.module.bisect_left, [1], 1, 0),
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(self.module.bisect_left, [1], 2, 1),
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(self.module.bisect_left, [1, 1], 0, 0),
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(self.module.bisect_left, [1, 1], 1, 0),
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(self.module.bisect_left, [1, 1], 2, 2),
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(self.module.bisect_left, [1, 1, 1], 0, 0),
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(self.module.bisect_left, [1, 1, 1], 1, 0),
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(self.module.bisect_left, [1, 1, 1], 2, 3),
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(self.module.bisect_left, [1, 1, 1, 1], 0, 0),
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(self.module.bisect_left, [1, 1, 1, 1], 1, 0),
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(self.module.bisect_left, [1, 1, 1, 1], 2, 4),
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(self.module.bisect_left, [1, 2], 0, 0),
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(self.module.bisect_left, [1, 2], 1, 0),
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(self.module.bisect_left, [1, 2], 1.5, 1),
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(self.module.bisect_left, [1, 2], 2, 1),
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(self.module.bisect_left, [1, 2], 3, 2),
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(self.module.bisect_left, [1, 1, 2, 2], 0, 0),
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(self.module.bisect_left, [1, 1, 2, 2], 1, 0),
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(self.module.bisect_left, [1, 1, 2, 2], 1.5, 2),
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(self.module.bisect_left, [1, 1, 2, 2], 2, 2),
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(self.module.bisect_left, [1, 1, 2, 2], 3, 4),
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(self.module.bisect_left, [1, 2, 3], 0, 0),
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(self.module.bisect_left, [1, 2, 3], 1, 0),
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(self.module.bisect_left, [1, 2, 3], 1.5, 1),
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(self.module.bisect_left, [1, 2, 3], 2, 1),
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(self.module.bisect_left, [1, 2, 3], 2.5, 2),
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(self.module.bisect_left, [1, 2, 3], 3, 2),
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(self.module.bisect_left, [1, 2, 3], 4, 3),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 0, 0),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 1, 0),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 1.5, 1),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 2, 1),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 2.5, 3),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 3, 3),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 3.5, 6),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 4, 6),
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(self.module.bisect_left, [1, 2, 2, 3, 3, 3, 4, 4, 4, 4], 5, 10)
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]
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def test_precomputed(self):
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for func, data, elem, expected in self.precomputedCases:
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self.assertEqual(func(data, elem), expected)
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self.assertEqual(func(UserList(data), elem), expected)
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def test_negative_lo(self):
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# Issue 3301
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mod = self.module
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self.assertRaises(ValueError, mod.bisect_left, [1, 2, 3], 5, -1, 3),
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self.assertRaises(ValueError, mod.bisect_right, [1, 2, 3], 5, -1, 3),
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self.assertRaises(ValueError, mod.insort_left, [1, 2, 3], 5, -1, 3),
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self.assertRaises(ValueError, mod.insort_right, [1, 2, 3], 5, -1, 3),
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def test_large_range(self):
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# Issue 13496
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mod = self.module
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n = sys.maxsize
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try:
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data = xrange(n-1)
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except OverflowError:
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self.skipTest("can't create a xrange() object of size `sys.maxsize`")
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self.assertEqual(mod.bisect_left(data, n-3), n-3)
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self.assertEqual(mod.bisect_right(data, n-3), n-2)
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self.assertEqual(mod.bisect_left(data, n-3, n-10, n), n-3)
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self.assertEqual(mod.bisect_right(data, n-3, n-10, n), n-2)
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def test_large_pyrange(self):
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# Same as above, but without C-imposed limits on range() parameters
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mod = self.module
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n = sys.maxsize
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data = Range(0, n-1)
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self.assertEqual(mod.bisect_left(data, n-3), n-3)
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self.assertEqual(mod.bisect_right(data, n-3), n-2)
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self.assertEqual(mod.bisect_left(data, n-3, n-10, n), n-3)
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self.assertEqual(mod.bisect_right(data, n-3, n-10, n), n-2)
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x = n - 100
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mod.insort_left(data, x, x - 50, x + 50)
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self.assertEqual(data.last_insert, (x, x))
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x = n - 200
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mod.insort_right(data, x, x - 50, x + 50)
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self.assertEqual(data.last_insert, (x + 1, x))
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def test_random(self, n=25):
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from random import randrange
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for i in xrange(n):
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data = [randrange(0, n, 2) for j in xrange(i)]
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data.sort()
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elem = randrange(-1, n+1)
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ip = self.module.bisect_left(data, elem)
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if ip < len(data):
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self.assertTrue(elem <= data[ip])
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if ip > 0:
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self.assertTrue(data[ip-1] < elem)
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ip = self.module.bisect_right(data, elem)
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if ip < len(data):
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self.assertTrue(elem < data[ip])
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if ip > 0:
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self.assertTrue(data[ip-1] <= elem)
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def test_optionalSlicing(self):
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for func, data, elem, expected in self.precomputedCases:
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for lo in xrange(4):
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lo = min(len(data), lo)
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for hi in xrange(3,8):
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hi = min(len(data), hi)
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ip = func(data, elem, lo, hi)
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self.assertTrue(lo <= ip <= hi)
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if func is self.module.bisect_left and ip < hi:
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self.assertTrue(elem <= data[ip])
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if func is self.module.bisect_left and ip > lo:
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self.assertTrue(data[ip-1] < elem)
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if func is self.module.bisect_right and ip < hi:
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self.assertTrue(elem < data[ip])
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if func is self.module.bisect_right and ip > lo:
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self.assertTrue(data[ip-1] <= elem)
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self.assertEqual(ip, max(lo, min(hi, expected)))
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def test_backcompatibility(self):
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self.assertEqual(self.module.bisect, self.module.bisect_right)
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def test_keyword_args(self):
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data = [10, 20, 30, 40, 50]
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self.assertEqual(self.module.bisect_left(a=data, x=25, lo=1, hi=3), 2)
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self.assertEqual(self.module.bisect_right(a=data, x=25, lo=1, hi=3), 2)
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self.assertEqual(self.module.bisect(a=data, x=25, lo=1, hi=3), 2)
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self.module.insort_left(a=data, x=25, lo=1, hi=3)
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self.module.insort_right(a=data, x=25, lo=1, hi=3)
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self.module.insort(a=data, x=25, lo=1, hi=3)
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self.assertEqual(data, [10, 20, 25, 25, 25, 30, 40, 50])
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class TestBisectPython(TestBisect):
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module = py_bisect
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class TestBisectC(TestBisect):
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module = c_bisect
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#==============================================================================
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class TestInsort(unittest.TestCase):
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module = None
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def test_vsBuiltinSort(self, n=500):
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from random import choice
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for insorted in (list(), UserList()):
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for i in xrange(n):
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digit = choice("0123456789")
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if digit in "02468":
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f = self.module.insort_left
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else:
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f = self.module.insort_right
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f(insorted, digit)
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self.assertEqual(sorted(insorted), insorted)
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def test_backcompatibility(self):
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self.assertEqual(self.module.insort, self.module.insort_right)
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def test_listDerived(self):
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class List(list):
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data = []
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def insert(self, index, item):
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self.data.insert(index, item)
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lst = List()
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self.module.insort_left(lst, 10)
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self.module.insort_right(lst, 5)
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self.assertEqual([5, 10], lst.data)
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class TestInsortPython(TestInsort):
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module = py_bisect
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class TestInsortC(TestInsort):
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module = c_bisect
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#==============================================================================
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class LenOnly:
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"Dummy sequence class defining __len__ but not __getitem__."
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def __len__(self):
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return 10
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class GetOnly:
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"Dummy sequence class defining __getitem__ but not __len__."
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def __getitem__(self, ndx):
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return 10
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class CmpErr:
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"Dummy element that always raises an error during comparison"
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def __cmp__(self, other):
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raise ZeroDivisionError
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class TestErrorHandling(unittest.TestCase):
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module = None
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def test_non_sequence(self):
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for f in (self.module.bisect_left, self.module.bisect_right,
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self.module.insort_left, self.module.insort_right):
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self.assertRaises(TypeError, f, 10, 10)
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def test_len_only(self):
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for f in (self.module.bisect_left, self.module.bisect_right,
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self.module.insort_left, self.module.insort_right):
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self.assertRaises(AttributeError, f, LenOnly(), 10)
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def test_get_only(self):
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for f in (self.module.bisect_left, self.module.bisect_right,
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self.module.insort_left, self.module.insort_right):
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self.assertRaises(AttributeError, f, GetOnly(), 10)
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def test_cmp_err(self):
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seq = [CmpErr(), CmpErr(), CmpErr()]
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for f in (self.module.bisect_left, self.module.bisect_right,
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self.module.insort_left, self.module.insort_right):
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self.assertRaises(ZeroDivisionError, f, seq, 10)
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def test_arg_parsing(self):
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for f in (self.module.bisect_left, self.module.bisect_right,
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self.module.insort_left, self.module.insort_right):
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self.assertRaises(TypeError, f, 10)
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class TestErrorHandlingPython(TestErrorHandling):
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module = py_bisect
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class TestErrorHandlingC(TestErrorHandling):
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module = c_bisect
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#==============================================================================
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libreftest = """
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Example from the Library Reference: Doc/library/bisect.rst
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The bisect() function is generally useful for categorizing numeric data.
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This example uses bisect() to look up a letter grade for an exam total
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(say) based on a set of ordered numeric breakpoints: 85 and up is an `A',
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75..84 is a `B', etc.
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>>> grades = "FEDCBA"
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>>> breakpoints = [30, 44, 66, 75, 85]
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>>> from bisect import bisect
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>>> def grade(total):
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... return grades[bisect(breakpoints, total)]
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...
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>>> grade(66)
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'C'
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>>> map(grade, [33, 99, 77, 44, 12, 88])
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['E', 'A', 'B', 'D', 'F', 'A']
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"""
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#------------------------------------------------------------------------------
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__test__ = {'libreftest' : libreftest}
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def test_main(verbose=None):
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from test import test_bisect
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test_classes = [TestBisectPython, TestBisectC,
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TestInsortPython, TestInsortC,
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TestErrorHandlingPython, TestErrorHandlingC]
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test_support.run_unittest(*test_classes)
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test_support.run_doctest(test_bisect, verbose)
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# verify reference counting
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if verbose and hasattr(sys, "gettotalrefcount"):
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import gc
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counts = [None] * 5
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for i in xrange(len(counts)):
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test_support.run_unittest(*test_classes)
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gc.collect()
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counts[i] = sys.gettotalrefcount()
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print counts
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if __name__ == "__main__":
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test_main(verbose=True)
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