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-rw-r--r--Lib/test/test_asyncio/test_tasks.py42
1 files changed, 41 insertions, 1 deletions
diff --git a/Lib/test/test_asyncio/test_tasks.py b/Lib/test/test_asyncio/test_tasks.py
index 44498ef790e..931a43816a2 100644
--- a/Lib/test/test_asyncio/test_tasks.py
+++ b/Lib/test/test_asyncio/test_tasks.py
@@ -24,7 +24,7 @@ from test.support.warnings_helper import ignore_warnings
def tearDownModule():
- asyncio._set_event_loop_policy(None)
+ asyncio.events._set_event_loop_policy(None)
async def coroutine_function():
@@ -2116,6 +2116,46 @@ class BaseTaskTests:
self.assertTrue(outer.cancelled())
self.assertEqual(0, 0 if outer._callbacks is None else len(outer._callbacks))
+ def test_shield_cancel_outer_result(self):
+ mock_handler = mock.Mock()
+ self.loop.set_exception_handler(mock_handler)
+ inner = self.new_future(self.loop)
+ outer = asyncio.shield(inner)
+ test_utils.run_briefly(self.loop)
+ outer.cancel()
+ test_utils.run_briefly(self.loop)
+ inner.set_result(1)
+ test_utils.run_briefly(self.loop)
+ mock_handler.assert_not_called()
+
+ def test_shield_cancel_outer_exception(self):
+ mock_handler = mock.Mock()
+ self.loop.set_exception_handler(mock_handler)
+ inner = self.new_future(self.loop)
+ outer = asyncio.shield(inner)
+ test_utils.run_briefly(self.loop)
+ outer.cancel()
+ test_utils.run_briefly(self.loop)
+ inner.set_exception(Exception('foo'))
+ test_utils.run_briefly(self.loop)
+ mock_handler.assert_called_once()
+
+ def test_shield_duplicate_log_once(self):
+ mock_handler = mock.Mock()
+ self.loop.set_exception_handler(mock_handler)
+ inner = self.new_future(self.loop)
+ outer = asyncio.shield(inner)
+ test_utils.run_briefly(self.loop)
+ outer.cancel()
+ test_utils.run_briefly(self.loop)
+ outer = asyncio.shield(inner)
+ test_utils.run_briefly(self.loop)
+ outer.cancel()
+ test_utils.run_briefly(self.loop)
+ inner.set_exception(Exception('foo'))
+ test_utils.run_briefly(self.loop)
+ mock_handler.assert_called_once()
+
def test_shield_shortcut(self):
fut = self.new_future(self.loop)
fut.set_result(42)