derrickaw commented on code in PR #39126:
URL: https://github.com/apache/beam/pull/39126#discussion_r3483712693
##########
sdks/python/apache_beam/yaml/yaml_provider_unit_test.py:
##########
@@ -377,3 +372,260 @@ def test_create_mixed_types(self):
[('a', None), ('element', 1)],
[('a', 2), ('element', None)],
]))
+
+
+class YamlProvidersFlattenTest(unittest.TestCase):
+ def test_flatten_schema_merging(self):
+ with beam.Pipeline() as p:
+ pcoll1 = p | 'C1' >> beam.Create([beam.Row(a=1)])
+ pcoll2 = p | 'C2' >> beam.Create([beam.Row(b=2)])
+ res = {
+ 'first': pcoll1, 'second': pcoll2
+ } | yaml_provider.YamlProviders.Flatten()
+ assert_that(
+ res | beam.Map(lambda x: sorted(x._asdict().items())),
+ equal_to([
+ [('a', 1), ('b', None)],
+ [('a', None), ('b', 2)],
+ ]))
+
+ def test_flatten_single_pcoll(self):
+ with beam.Pipeline() as p:
+ pcoll = p | beam.Create([beam.Row(a=1)])
+ res = pcoll | yaml_provider.YamlProviders.Flatten()
+ assert_that(res, equal_to([beam.Row(a=1)]))
+
+ def test_flatten_empty(self):
+ with beam.Pipeline() as p:
+ res = p | yaml_provider.YamlProviders.Flatten()
+ assert_that(res, equal_to([]))
+
+ def test_flatten_single_pcoll(self):
+ with beam.Pipeline() as p:
+ pcoll = p | beam.Create([beam.Row(a=1)])
+ res = pcoll | yaml_provider.YamlProviders.Flatten()
+ assert_that(res, equal_to([beam.Row(a=1)]))
+
+ def test_flatten_empty(self):
+ with beam.Pipeline() as p:
+ res = p | yaml_provider.YamlProviders.Flatten()
+ assert_that(res, equal_to([]))
Review Comment:
Thanks
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