Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_devpoll.py @ 73798:6cde416ef03b

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Credit Per Øyvind Karlsen for the initial implementation of the lzma module (issue #6715).
author Nadeem Vawda <nadeem.vawda@gmail.com>
date Thu, 01 Dec 2011 01:18:27 +0200
parents 8f7ab4bf7ad9
children 8f10c9eae183 520adfab957e
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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, select, random, unittest, sys
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6 from test.support import TESTFN, run_unittest
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7
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8 try:
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9 select.devpoll
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10 except AttributeError:
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11 raise unittest.SkipTest("select.devpoll not defined -- skipping test_devpoll")
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12
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13
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14 def find_ready_matching(ready, flag):
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15 match = []
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16 for fd, mode in ready:
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17 if mode & flag:
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18 match.append(fd)
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19 return match
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21 class DevPollTests(unittest.TestCase):
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23 def test_devpoll1(self):
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24 # Basic functional test of poll object
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25 # Create a bunch of pipe and test that poll works with them.
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26
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27 p = select.devpoll()
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28
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29 NUM_PIPES = 12
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30 MSG = b" This is a test."
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31 MSG_LEN = len(MSG)
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32 readers = []
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33 writers = []
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34 r2w = {}
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35 w2r = {}
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36
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37 for i in range(NUM_PIPES):
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38 rd, wr = os.pipe()
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39 p.register(rd)
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40 p.modify(rd, select.POLLIN)
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41 p.register(wr, select.POLLOUT)
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42 readers.append(rd)
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43 writers.append(wr)
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44 r2w[rd] = wr
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45 w2r[wr] = rd
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47 bufs = []
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48
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49 while writers:
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50 ready = p.poll()
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51 ready_writers = find_ready_matching(ready, select.POLLOUT)
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52 if not ready_writers:
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53 self.fail("no pipes ready for writing")
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54 wr = random.choice(ready_writers)
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55 os.write(wr, MSG)
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56
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57 ready = p.poll()
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58 ready_readers = find_ready_matching(ready, select.POLLIN)
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59 if not ready_readers:
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60 self.fail("no pipes ready for reading")
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61 self.assertEqual([w2r[wr]], ready_readers)
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62 rd = ready_readers[0]
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63 buf = os.read(rd, MSG_LEN)
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64 self.assertEqual(len(buf), MSG_LEN)
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65 bufs.append(buf)
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66 os.close(r2w[rd]) ; os.close(rd)
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67 p.unregister(r2w[rd])
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68 p.unregister(rd)
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69 writers.remove(r2w[rd])
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71 self.assertEqual(bufs, [MSG] * NUM_PIPES)
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72
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73 def test_timeout_overflow(self):
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74 pollster = select.devpoll()
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75 w, r = os.pipe()
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76 pollster.register(w)
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77
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78 pollster.poll(-1)
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79 self.assertRaises(OverflowError, pollster.poll, -2)
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80 self.assertRaises(OverflowError, pollster.poll, -1 << 31)
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81 self.assertRaises(OverflowError, pollster.poll, -1 << 64)
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83 pollster.poll(0)
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84 pollster.poll(1)
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85 pollster.poll(1 << 30)
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86 self.assertRaises(OverflowError, pollster.poll, 1 << 31)
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87 self.assertRaises(OverflowError, pollster.poll, 1 << 63)
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88 self.assertRaises(OverflowError, pollster.poll, 1 << 64)
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89
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90 def test_main():
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91 run_unittest(DevPollTests)
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93 if __name__ == '__main__':
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94 test_main()