sdks/python/apache_beam/runners/pipeline_context_test.py

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# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
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#    http://www.apache.org/licenses/LICENSE-2.0
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"""Unit tests for the windowing classes."""

from __future__ import absolute_import

import unittest

from apache_beam import coders
from apache_beam.runners import pipeline_context


class PipelineContextTest(unittest.TestCase):

  def test_deduplication(self):
    context = pipeline_context.PipelineContext()
    bytes_coder_ref = context.coders.get_id(coders.BytesCoder())
    bytes_coder_ref2 = context.coders.get_id(coders.BytesCoder())
    self.assertEqual(bytes_coder_ref, bytes_coder_ref2)

  def test_deduplication_by_proto(self):
    context = pipeline_context.PipelineContext()
    bytes_coder_proto = coders.BytesCoder().to_runner_api(None)
    bytes_coder_ref = context.coders.get_by_proto(bytes_coder_proto)
    bytes_coder_ref2 = context.coders.get_by_proto(
        bytes_coder_proto, deduplicate=True)
    self.assertEqual(bytes_coder_ref, bytes_coder_ref2)

  def test_serialization(self):
    context = pipeline_context.PipelineContext()
    float_coder_ref = context.coders.get_id(coders.FloatCoder())
    bytes_coder_ref = context.coders.get_id(coders.BytesCoder())
    proto = context.to_runner_api()
    context2 = pipeline_context.PipelineContext.from_runner_api(proto)
    self.assertEqual(
        coders.FloatCoder(),
        context2.coders.get_by_id(float_coder_ref))
    self.assertEqual(
        coders.BytesCoder(),
        context2.coders.get_by_id(bytes_coder_ref))


if __name__ == '__main__':
  unittest.main()