Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_dummy_thread.py @ 78069:a8aa77458e12 3.2

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Add c_size_t and c_ssize_t to the ctypes summary table.
author Antoine Pitrou <solipsis@pitrou.net>
date Thu, 12 Jul 2012 20:31:50 +0200
parents 71acd4482e65
children b82c3e593db6
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1 """Generic thread tests.
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2
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3 Meant to be used by dummy_thread and thread. To allow for different modules
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4 to be used, test_main() can be called with the module to use as the thread
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5 implementation as its sole argument.
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6
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7 """
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8 import _dummy_thread as _thread
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9 import time
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10 import queue
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11 import random
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12 import unittest
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13 from test import support
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14
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15 DELAY = 0 # Set > 0 when testing a module other than _dummy_thread, such as
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16 # the '_thread' module.
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17
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18 class LockTests(unittest.TestCase):
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19 """Test lock objects."""
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20
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21 def setUp(self):
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22 # Create a lock
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23 self.lock = _thread.allocate_lock()
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24
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25 def test_initlock(self):
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26 #Make sure locks start locked
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27 self.assertTrue(not self.lock.locked(),
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28 "Lock object is not initialized unlocked.")
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29
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30 def test_release(self):
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31 # Test self.lock.release()
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32 self.lock.acquire()
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33 self.lock.release()
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34 self.assertTrue(not self.lock.locked(),
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35 "Lock object did not release properly.")
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36
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37 def test_improper_release(self):
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38 #Make sure release of an unlocked thread raises _thread.error
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39 self.assertRaises(_thread.error, self.lock.release)
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40
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41 def test_cond_acquire_success(self):
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42 #Make sure the conditional acquiring of the lock works.
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43 self.assertTrue(self.lock.acquire(0),
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44 "Conditional acquiring of the lock failed.")
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45
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46 def test_cond_acquire_fail(self):
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47 #Test acquiring locked lock returns False
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48 self.lock.acquire(0)
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49 self.assertTrue(not self.lock.acquire(0),
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50 "Conditional acquiring of a locked lock incorrectly "
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51 "succeeded.")
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52
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53 def test_uncond_acquire_success(self):
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54 #Make sure unconditional acquiring of a lock works.
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55 self.lock.acquire()
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56 self.assertTrue(self.lock.locked(),
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57 "Uncondional locking failed.")
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58
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59 def test_uncond_acquire_return_val(self):
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60 #Make sure that an unconditional locking returns True.
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61 self.assertTrue(self.lock.acquire(1) is True,
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62 "Unconditional locking did not return True.")
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63 self.assertTrue(self.lock.acquire() is True)
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64
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65 def test_uncond_acquire_blocking(self):
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66 #Make sure that unconditional acquiring of a locked lock blocks.
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67 def delay_unlock(to_unlock, delay):
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68 """Hold on to lock for a set amount of time before unlocking."""
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69 time.sleep(delay)
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70 to_unlock.release()
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71
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72 self.lock.acquire()
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73 start_time = int(time.time())
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74 _thread.start_new_thread(delay_unlock,(self.lock, DELAY))
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75 if support.verbose:
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76 print()
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77 print("*** Waiting for thread to release the lock "\
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78 "(approx. %s sec.) ***" % DELAY)
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79 self.lock.acquire()
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80 end_time = int(time.time())
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81 if support.verbose:
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82 print("done")
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83 self.assertTrue((end_time - start_time) >= DELAY,
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84 "Blocking by unconditional acquiring failed.")
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85
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86 class MiscTests(unittest.TestCase):
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87 """Miscellaneous tests."""
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88
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89 def test_exit(self):
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90 #Make sure _thread.exit() raises SystemExit
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91 self.assertRaises(SystemExit, _thread.exit)
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92
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93 def test_ident(self):
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94 #Test sanity of _thread.get_ident()
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95 self.assertIsInstance(_thread.get_ident(), int,
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96 "_thread.get_ident() returned a non-integer")
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97 self.assertTrue(_thread.get_ident() != 0,
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98 "_thread.get_ident() returned 0")
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99
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100 def test_LockType(self):
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101 #Make sure _thread.LockType is the same type as _thread.allocate_locke()
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102 self.assertIsInstance(_thread.allocate_lock(), _thread.LockType,
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103 "_thread.LockType is not an instance of what "
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104 "is returned by _thread.allocate_lock()")
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105
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106 def test_interrupt_main(self):
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107 #Calling start_new_thread with a function that executes interrupt_main
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108 # should raise KeyboardInterrupt upon completion.
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109 def call_interrupt():
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110 _thread.interrupt_main()
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111 self.assertRaises(KeyboardInterrupt, _thread.start_new_thread,
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112 call_interrupt, tuple())
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113
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114 def test_interrupt_in_main(self):
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115 # Make sure that if interrupt_main is called in main threat that
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116 # KeyboardInterrupt is raised instantly.
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117 self.assertRaises(KeyboardInterrupt, _thread.interrupt_main)
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118
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119 class ThreadTests(unittest.TestCase):
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120 """Test thread creation."""
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121
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122 def test_arg_passing(self):
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123 #Make sure that parameter passing works.
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124 def arg_tester(queue, arg1=False, arg2=False):
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125 """Use to test _thread.start_new_thread() passes args properly."""
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126 queue.put((arg1, arg2))
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127
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128 testing_queue = queue.Queue(1)
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129 _thread.start_new_thread(arg_tester, (testing_queue, True, True))
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130 result = testing_queue.get()
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131 self.assertTrue(result[0] and result[1],
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132 "Argument passing for thread creation using tuple failed")
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133 _thread.start_new_thread(arg_tester, tuple(), {'queue':testing_queue,
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134 'arg1':True, 'arg2':True})
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135 result = testing_queue.get()
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136 self.assertTrue(result[0] and result[1],
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137 "Argument passing for thread creation using kwargs failed")
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138 _thread.start_new_thread(arg_tester, (testing_queue, True), {'arg2':True})
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139 result = testing_queue.get()
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140 self.assertTrue(result[0] and result[1],
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141 "Argument passing for thread creation using both tuple"
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142 " and kwargs failed")
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143
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144 def test_multi_creation(self):
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145 #Make sure multiple threads can be created.
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146 def queue_mark(queue, delay):
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147 """Wait for ``delay`` seconds and then put something into ``queue``"""
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148 time.sleep(delay)
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149 queue.put(_thread.get_ident())
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150
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151 thread_count = 5
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152 testing_queue = queue.Queue(thread_count)
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153 if support.verbose:
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154 print()
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155 print("*** Testing multiple thread creation "\
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156 "(will take approx. %s to %s sec.) ***" % (DELAY, thread_count))
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157 for count in range(thread_count):
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158 if DELAY:
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159 local_delay = round(random.random(), 1)
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160 else:
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161 local_delay = 0
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162 _thread.start_new_thread(queue_mark,
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163 (testing_queue, local_delay))
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164 time.sleep(DELAY)
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165 if support.verbose:
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166 print('done')
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167 self.assertTrue(testing_queue.qsize() == thread_count,
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168 "Not all %s threads executed properly after %s sec." %
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169 (thread_count, DELAY))
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170
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171 def test_main(imported_module=None):
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172 global _thread, DELAY
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173 if imported_module:
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174 _thread = imported_module
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175 DELAY = 2
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176 if support.verbose:
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177 print()
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178 print("*** Using %s as _thread module ***" % _thread)
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179 support.run_unittest(LockTests, MiscTests, ThreadTests)
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180
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181 if __name__ == '__main__':
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182 test_main()