| # |
| # 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. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| |
| """Tests for the Observable mixin class.""" |
| # pytype: skip-file |
| |
| import logging |
| import unittest |
| from typing import List |
| from typing import Optional |
| |
| from apache_beam.coders import observable |
| |
| |
| class ObservableMixinTest(unittest.TestCase): |
| observed_count = 0 |
| observed_sum = 0 |
| observed_keys = [] # type: List[Optional[str]] |
| |
| def observer(self, value, key=None): |
| self.observed_count += 1 |
| self.observed_sum += value |
| self.observed_keys.append(key) |
| |
| def test_observable(self): |
| class Watched(observable.ObservableMixin): |
| def __iter__(self): |
| for i in (1, 4, 3): |
| self.notify_observers(i, key='a%d' % i) |
| yield i |
| |
| watched = Watched() |
| watched.register_observer(lambda v, key: self.observer(v, key=key)) |
| for _ in watched: |
| pass |
| |
| self.assertEqual(3, self.observed_count) |
| self.assertEqual(8, self.observed_sum) |
| self.assertEqual(['a1', 'a3', 'a4'], sorted(self.observed_keys)) |
| |
| |
| if __name__ == '__main__': |
| logging.getLogger().setLevel(logging.INFO) |
| unittest.main() |