Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_devpoll.py @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents ef889c3d5dc6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # Test case for the select.devpoll() function
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2
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3 # Initial tests are copied as is from "test_poll.py"
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4
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5 import os
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6 import random
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7 import select
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8 import sys
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9 import unittest
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10 from test.support import TESTFN, run_unittest
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11
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12 try:
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13 select.devpoll
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14 except AttributeError:
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15 raise unittest.SkipTest("select.devpoll not defined")
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16
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17
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18 def find_ready_matching(ready, flag):
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19 match = []
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20 for fd, mode in ready:
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21 if mode & flag:
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22 match.append(fd)
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23 return match
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24
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25 class DevPollTests(unittest.TestCase):
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27 def test_devpoll1(self):
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28 # Basic functional test of poll object
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29 # Create a bunch of pipe and test that poll works with them.
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30
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31 p = select.devpoll()
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32
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33 NUM_PIPES = 12
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34 MSG = b" This is a test."
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35 MSG_LEN = len(MSG)
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36 readers = []
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37 writers = []
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38 r2w = {}
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39 w2r = {}
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40
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41 for i in range(NUM_PIPES):
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42 rd, wr = os.pipe()
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43 p.register(rd)
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44 p.modify(rd, select.POLLIN)
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45 p.register(wr, select.POLLOUT)
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46 readers.append(rd)
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47 writers.append(wr)
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48 r2w[rd] = wr
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49 w2r[wr] = rd
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50
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51 bufs = []
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52
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53 while writers:
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54 ready = p.poll()
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55 ready_writers = find_ready_matching(ready, select.POLLOUT)
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56 if not ready_writers:
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57 self.fail("no pipes ready for writing")
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58 wr = random.choice(ready_writers)
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59 os.write(wr, MSG)
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60
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61 ready = p.poll()
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62 ready_readers = find_ready_matching(ready, select.POLLIN)
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63 if not ready_readers:
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64 self.fail("no pipes ready for reading")
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65 self.assertEqual([w2r[wr]], ready_readers)
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66 rd = ready_readers[0]
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67 buf = os.read(rd, MSG_LEN)
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68 self.assertEqual(len(buf), MSG_LEN)
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69 bufs.append(buf)
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70 os.close(r2w[rd]) ; os.close(rd)
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71 p.unregister(r2w[rd])
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72 p.unregister(rd)
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73 writers.remove(r2w[rd])
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74
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75 self.assertEqual(bufs, [MSG] * NUM_PIPES)
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76
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77 def test_timeout_overflow(self):
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78 pollster = select.devpoll()
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79 w, r = os.pipe()
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80 pollster.register(w)
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81
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82 pollster.poll(-1)
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83 self.assertRaises(OverflowError, pollster.poll, -2)
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84 self.assertRaises(OverflowError, pollster.poll, -1 << 31)
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85 self.assertRaises(OverflowError, pollster.poll, -1 << 64)
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86
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87 pollster.poll(0)
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88 pollster.poll(1)
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89 pollster.poll(1 << 30)
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90 self.assertRaises(OverflowError, pollster.poll, 1 << 31)
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91 self.assertRaises(OverflowError, pollster.poll, 1 << 63)
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92 self.assertRaises(OverflowError, pollster.poll, 1 << 64)
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93
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94 def test_close(self):
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95 open_file = open(__file__, "rb")
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96 self.addCleanup(open_file.close)
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97 fd = open_file.fileno()
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98 devpoll = select.devpoll()
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99
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100 # test fileno() method and closed attribute
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101 self.assertIsInstance(devpoll.fileno(), int)
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102 self.assertFalse(devpoll.closed)
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103
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104 # test close()
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105 devpoll.close()
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106 self.assertTrue(devpoll.closed)
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107 self.assertRaises(ValueError, devpoll.fileno)
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108
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109 # close() can be called more than once
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110 devpoll.close()
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111
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112 # operations must fail with ValueError("I/O operation on closed ...")
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113 self.assertRaises(ValueError, devpoll.modify, fd, select.POLLIN)
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114 self.assertRaises(ValueError, devpoll.poll)
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115 self.assertRaises(ValueError, devpoll.register, fd, fd, select.POLLIN)
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116 self.assertRaises(ValueError, devpoll.unregister, fd)
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117
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118 def test_fd_non_inheritable(self):
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119 devpoll = select.devpoll()
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120 self.addCleanup(devpoll.close)
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121 self.assertEqual(os.get_inheritable(devpoll.fileno()), False)
ef889c3d5dc6 Issue #18571: Implementation of the PEP 446: file descriptors and file handles
Victor Stinner <victor.stinner@gmail.com>
parents: 85300
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122
85300
ccbe2132392b Close #18794: Add a fileno() method and a closed attribute to select.devpoll
Victor Stinner <victor.stinner@gmail.com>
parents: 81589
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123
40450
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 36121
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124 def test_main():
73549
8f7ab4bf7ad9 Issue #6397: Support '/dev/poll' polling objects in select module, under Solaris & derivatives.
Jesus Cea <jcea@jcea.es>
parents: 52389
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125 run_unittest(DevPollTests)
36121
686306a67e9b Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 35834
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126
40450
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 36121
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127 if __name__ == '__main__':
cc992d75d5b3 Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents: 36121
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128 test_main()