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Diffstat (limited to 'src/python/grpcio_test/grpc_test/framework/foundation/_later_test.py')
-rw-r--r-- | src/python/grpcio_test/grpc_test/framework/foundation/_later_test.py | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/src/python/grpcio_test/grpc_test/framework/foundation/_later_test.py b/src/python/grpcio_test/grpc_test/framework/foundation/_later_test.py new file mode 100644 index 0000000000..6c2459e185 --- /dev/null +++ b/src/python/grpcio_test/grpc_test/framework/foundation/_later_test.py @@ -0,0 +1,151 @@ +# Copyright 2015, Google Inc. +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions are +# met: +# +# * Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# * Redistributions in binary form must reproduce the above +# copyright notice, this list of conditions and the following disclaimer +# in the documentation and/or other materials provided with the +# distribution. +# * Neither the name of Google Inc. nor the names of its +# contributors may be used to endorse or promote products derived from +# this software without specific prior written permission. +# +# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +"""Tests of the later module.""" + +import threading +import time +import unittest + +from grpc.framework.foundation import later + +TICK = 0.1 + + +class LaterTest(unittest.TestCase): + + def test_simple_delay(self): + lock = threading.Lock() + cell = [0] + return_value = object() + + def computation(): + with lock: + cell[0] += 1 + return return_value + computation_future = later.later(TICK * 2, computation) + + self.assertFalse(computation_future.done()) + self.assertFalse(computation_future.cancelled()) + time.sleep(TICK) + self.assertFalse(computation_future.done()) + self.assertFalse(computation_future.cancelled()) + with lock: + self.assertEqual(0, cell[0]) + time.sleep(TICK * 2) + self.assertTrue(computation_future.done()) + self.assertFalse(computation_future.cancelled()) + with lock: + self.assertEqual(1, cell[0]) + self.assertEqual(return_value, computation_future.result()) + + def test_callback(self): + lock = threading.Lock() + cell = [0] + callback_called = [False] + future_passed_to_callback = [None] + def computation(): + with lock: + cell[0] += 1 + computation_future = later.later(TICK * 2, computation) + def callback(outcome): + with lock: + callback_called[0] = True + future_passed_to_callback[0] = outcome + computation_future.add_done_callback(callback) + time.sleep(TICK) + with lock: + self.assertFalse(callback_called[0]) + time.sleep(TICK * 2) + with lock: + self.assertTrue(callback_called[0]) + self.assertTrue(future_passed_to_callback[0].done()) + + callback_called[0] = False + future_passed_to_callback[0] = None + + computation_future.add_done_callback(callback) + with lock: + self.assertTrue(callback_called[0]) + self.assertTrue(future_passed_to_callback[0].done()) + + def test_cancel(self): + lock = threading.Lock() + cell = [0] + callback_called = [False] + future_passed_to_callback = [None] + def computation(): + with lock: + cell[0] += 1 + computation_future = later.later(TICK * 2, computation) + def callback(outcome): + with lock: + callback_called[0] = True + future_passed_to_callback[0] = outcome + computation_future.add_done_callback(callback) + time.sleep(TICK) + with lock: + self.assertFalse(callback_called[0]) + computation_future.cancel() + self.assertTrue(computation_future.cancelled()) + self.assertFalse(computation_future.running()) + self.assertTrue(computation_future.done()) + with lock: + self.assertTrue(callback_called[0]) + self.assertTrue(future_passed_to_callback[0].cancelled()) + + def test_result(self): + lock = threading.Lock() + cell = [0] + callback_called = [False] + future_passed_to_callback_cell = [None] + return_value = object() + + def computation(): + with lock: + cell[0] += 1 + return return_value + computation_future = later.later(TICK * 2, computation) + + def callback(future_passed_to_callback): + with lock: + callback_called[0] = True + future_passed_to_callback_cell[0] = future_passed_to_callback + computation_future.add_done_callback(callback) + returned_value = computation_future.result() + self.assertEqual(return_value, returned_value) + + # The callback may not yet have been called! Sleep a tick. + time.sleep(TICK) + with lock: + self.assertTrue(callback_called[0]) + self.assertEqual(return_value, future_passed_to_callback_cell[0].result()) + +if __name__ == '__main__': + unittest.main(verbosity=2) |