Initial checkin of gRPC to third_party/

third_party/grpc/src/python/grpcio/tests/unit/framework/foundation/_later_test.py

Index: third_party/grpc/src/python/grpcio/tests/unit/framework/foundation/_later_test.py
diff --git a/third_party/grpc/src/python/grpcio/tests/unit/framework/foundation/_later_test.py b/third_party/grpc/src/python/grpcio/tests/unit/framework/foundation/_later_test.py
new file mode 100644
index 0000000000000000000000000000000000000000..6c2459e185196a2abf145589bf556636f94a5519
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+++ b/third_party/grpc/src/python/grpcio/tests/unit/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)