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third_party/gsutil/gslib/test_thread_pool.py

Index: third_party/gsutil/gslib/test_thread_pool.py
diff --git a/third_party/gsutil/gslib/test_thread_pool.py b/third_party/gsutil/gslib/test_thread_pool.py
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+++ b/third_party/gsutil/gslib/test_thread_pool.py
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+#!/usr/bin/env python
+#
+# Copyright 2011 Google Inc.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish, dis-
+# tribute, sublicense, and/or sell copies of the Software, and to permit
+# persons to whom the Software is furnished to do so, subject to the fol-
+# lowing conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABIL-
+# ITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+# SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+"""Unit tests for gsutil thread pool."""
+
+import sys
+import threading
+import thread_pool
+import unittest
+
+
+class GsutilThreadPoolTests(unittest.TestCase):
+  """gsutil thread pool test suite."""
+
+  def GetSuiteDescription(self):
+    return 'gsutil thread pool test suite'
+
+  @classmethod
+  def SetUpClass(cls):
+    """Creates class level artifacts useful to multiple tests."""
+    pass
+
+  @classmethod
+  def TearDownClass(cls):
+    """Cleans up any artifacts created by SetUpClass."""
+    pass
+
+  def _TestThreadPool(self, threads):
+    """Tests pool with specified threads from end to end."""
+    pool = thread_pool.ThreadPool(threads)
+
+    self.actual_call_count = 0
+    expected_call_count = 10000
+
+    self.data = xrange(expected_call_count)
+
+    self.actual_result = 0
+    expected_result = sum(self.data)
+
+    stats_lock = threading.Lock()
+
+    def _Dummy(num):
+      stats_lock.acquire()
+      self.actual_call_count += 1
+      self.actual_result += num
+      stats_lock.release()
+
+    for data in xrange(expected_call_count):
+      pool.AddTask(_Dummy, data)
+
+    pool.WaitCompletion()
+    self.assertEqual(self.actual_call_count, expected_call_count)
+
+    self.assertEqual(self.actual_result, expected_result)
+
+    pool.Shutdown()
+    for thread in pool.threads:
+      self.assertFalse(thread.is_alive())
+
+  def TestSingleThreadPool(self):
+    """Tests thread pool with a single thread."""
+    self._TestThreadPool(1)
+
+  def TestThirtyThreadPool(self):
+    """Tests thread pool with 30 threads."""
+    self._TestThreadPool(30)
+
+  def TestThreadPoolExceptionHandler(self):
+    """Tests thread pool with exceptions."""
+    self.exception_raised = False
+
+    def _ExceptionHandler(e):
+      """Verify an exception is raised and that it's the correct one."""
+      self.assertTrue(isinstance(e, TypeError))
+      self.assertEqual(e[0], 'gsutil')
+      self.exception_raised = True
+
+    pool = thread_pool.ThreadPool(1, exception_handler=_ExceptionHandler)
+
+    def _Dummy():
+      raise TypeError('gsutil')
+
+    pool.AddTask(_Dummy)
+    pool.WaitCompletion()
+    pool.Shutdown()
+
+    self.assertTrue(self.exception_raised)
+
+
+if __name__ == '__main__':
+  if sys.version_info[:3] < (2, 5, 1):
+    sys.exit('These tests must be run on at least Python 2.5.1\n')
+  test_loader = unittest.TestLoader()
+  test_loader.testMethodPrefix = 'Test'
+  suite = test_loader.loadTestsFromTestCase(GsutilThreadPoolTests)
+  # Seems like there should be a cleaner way to find the test_class.
+  test_class = suite.__getattribute__('_tests')[0]
+  # We call SetUpClass() and TearDownClass() ourselves because we
+  # don't assume the user has Python 2.7 (which supports classmethods
+  # that do it, with camelCase versions of these names).
+  try:
+    print 'Setting up %s...' % test_class.GetSuiteDescription()
+    test_class.SetUpClass()
+    print 'Running %s...' % test_class.GetSuiteDescription()
+    unittest.TextTestRunner(verbosity=2).run(suite)
+  finally:
+    print 'Cleaning up after %s...' % test_class.GetSuiteDescription()
+    test_class.TearDownClass()
+    print ''