| # |
| # 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. |
| # |
| |
| """Unit tests for core module.""" |
| |
| from __future__ import absolute_import |
| |
| import unittest |
| |
| from apache_beam.transforms.core import WatermarkEstimator |
| from apache_beam.utils.timestamp import Timestamp |
| |
| |
| class WatermarkEstimatorTest(unittest.TestCase): |
| |
| def test_set_watermark(self): |
| watermark_estimator = WatermarkEstimator() |
| self.assertEqual(watermark_estimator.current_watermark(), None) |
| # set_watermark should only accept timestamp.Timestamp. |
| with self.assertRaises(ValueError): |
| watermark_estimator.set_watermark(0) |
| |
| # watermark_estimator should always keep minimal timestamp. |
| watermark_estimator.set_watermark(Timestamp(100)) |
| self.assertEqual(watermark_estimator.current_watermark(), 100) |
| watermark_estimator.set_watermark(Timestamp(150)) |
| self.assertEqual(watermark_estimator.current_watermark(), 100) |
| watermark_estimator.set_watermark(Timestamp(50)) |
| self.assertEqual(watermark_estimator.current_watermark(), 50) |
| |
| def test_reset(self): |
| watermark_estimator = WatermarkEstimator() |
| watermark_estimator.set_watermark(Timestamp(100)) |
| self.assertEqual(watermark_estimator.current_watermark(), 100) |
| watermark_estimator.reset() |
| self.assertEqual(watermark_estimator.current_watermark(), None) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |