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| 1 # Copyright (c) 2016 The Chromium Authors. All rights reserved. |
| 2 # Use of this source code is governed by a BSD-style license that can be |
| 3 # found in the LICENSE file. |
| 4 |
| 5 |
| 6 import sys |
| 7 import threading |
| 8 import traceback |
| 9 import unittest |
| 10 |
| 11 |
| 12 class ThreadWatcherMixIn(object): |
| 13 def setUp(self): |
| 14 self._pre_test_threads = [t.ident for t in threading.enumerate()] |
| 15 |
| 16 def tearDown(self): |
| 17 post_test_threads = threading.enumerate() |
| 18 new_threads = [t for t in post_test_threads |
| 19 if t.ident not in self._pre_test_threads] |
| 20 if new_threads: |
| 21 details = [] |
| 22 for th in new_threads: |
| 23 details.append('\nThread %s stacktrace:\n' % th) |
| 24 try: |
| 25 details.extend(traceback.format_stack(sys._current_frames()[t.ident])) |
| 26 except Exception: |
| 27 if t.ident in sys._current_frames(): |
| 28 raise |
| 29 # This can happen due to threads starting or stopping concurrently. |
| 30 details.append(' Thread stopped while acquiring stacktrace.\n') |
| 31 details = ''.join(details) |
| 32 |
| 33 self.fail('Found %d running thread(s) after the test.\n%s' % ( |
| 34 len(new_threads), details)) |
| 35 |
| 36 |
| 37 |
| 38 class TestCase(unittest.TestCase, ThreadWatcherMixIn): |
| 39 """Base unittest class that fails on leaked threads after the test.""" |
| 40 def setUp(self): |
| 41 super(TestCase, self).setUp() |
| 42 ThreadWatcherMixIn.setUp(self) |
| 43 |
| 44 def tearDown(self): |
| 45 ThreadWatcherMixIn.tearDown(self) |
| 46 super(TestCase, self).tearDown() |
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