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# Copyright 2018 The TensorFlow Authors. All Rights Reserved.
#
# Licensed 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.
# See the License for the specific language governing permissions and
# limitations under the License.
# ==============================================================================
"""Tests for forward and backwards compatibility utilties."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import datetime
from tensorflow.python.compat import compat
from tensorflow.python.platform import test
class CompatTest(test.TestCase):
def _compatibility_date(self):
date = compat._FORWARD_COMPATIBILITY_HORIZON # pylint: disable=protected-access
return (date.year, date.month, date.day)
def _n_days_after(self, n):
date = compat._FORWARD_COMPATIBILITY_HORIZON + datetime.timedelta(days=n) # pylint: disable=protected-access
return (date.year, date.month, date.day)
def test_basic(self):
compatibility_date = self._compatibility_date()
one_day_before = self._n_days_after(-1)
self.assertTrue(compat.forward_compatible(*one_day_before))
self.assertFalse(compat.forward_compatible(*compatibility_date))
def test_decorator(self):
compatibility_date = self._compatibility_date()
one_day_after = self._n_days_after(1)
with compat.forward_compatibility_horizon(*one_day_after):
self.assertTrue(compat.forward_compatible(*compatibility_date))
self.assertFalse(compat.forward_compatible(*one_day_after))
# After exiting context manager, value should be reset.
self.assertFalse(compat.forward_compatible(*compatibility_date))
def test_decorator_with_failure(self):
compatibility_date = self._compatibility_date()
one_day_after = self._n_days_after(1)
class DummyError(Exception):
pass
try:
with compat.forward_compatibility_horizon(*one_day_after):
raise DummyError()
except DummyError:
pass # silence DummyError
# After exiting context manager, value should be reset.
self.assertFalse(compat.forward_compatible(*compatibility_date))
if __name__ == '__main__':
test.main()
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