# coding=utf-8
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# 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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from __future__ import absolute_import
from __future__ import print_function

import unittest

import mock

from apache_beam.examples.snippets.transforms.element_wise.kvswap import *
from apache_beam.testing.test_pipeline import TestPipeline
from apache_beam.testing.util import assert_that
from apache_beam.testing.util import equal_to


@mock.patch('apache_beam.Pipeline', TestPipeline)
# pylint: disable=line-too-long
@mock.patch('apache_beam.examples.snippets.transforms.element_wise.kvswap.print', lambda elem: elem)
# pylint: enable=line-too-long
class KvSwapTest(unittest.TestCase):
  def __init__(self, methodName):
    super(KvSwapTest, self).__init__(methodName)
    # [START plants]
    plants = [
        ('Strawberry', '🍓'),
        ('Carrot', '🥕'),
        ('Eggplant', '🍆'),
        ('Tomato', '🍅'),
        ('Potato', '🥔'),
    ]
    # [END plants]
    self.plants_test = lambda actual: assert_that(actual, equal_to(plants))

  def test_kvswap(self):
    kvswap(self.plants_test)


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