#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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#
"""Clock implementations for real time processing and testing."""
from __future__ import absolute_import
import time
[docs]class Clock(object):
"""For internal use only; no backwards-compatibility guarantees."""
[docs] def time(self):
"""Returns the number of milliseconds since epoch."""
return int(time.time() * 1000)
[docs]class MockClock(Clock):
"""For internal use only; no backwards-compatibility guarantees.
Mock clock implementation for testing."""
def __init__(self, now_in_ms):
self._now_in_ms = now_in_ms
[docs] def time(self):
return self._now_in_ms
[docs] def set_time(self, value_in_ms):
assert value_in_ms >= self._now_in_ms
self._now_in_ms = value_in_ms
[docs] def advance(self, duration_in_ms):
assert duration_in_ms >= 0
self._now_in_ms += duration_in_ms