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https://issues.apache.org/jira/browse/BEAM-3377?focusedWorklogId=99167&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-99167
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ASF GitHub Bot logged work on BEAM-3377:
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Author: ASF GitHub Bot
Created on: 07/May/18 19:53
Start Date: 07/May/18 19:53
Worklog Time Spent: 10m
Work Description: lukecwik commented on issue #5279: [BEAM-3377] Call
assert_that per window via windowed (flag)
URL: https://github.com/apache/beam/pull/5279#issuecomment-387182910
You also need to make sure that the windowing strategy has a trigger
specified that will fire at some point in time otherwise the side input will
never become ready. For example in the GlobalWindow you could use an
AfterCount(1) trigger or use FixedWindows with an AfterWatermark trigger.
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Issue Time Tracking
-------------------
Worklog Id: (was: 99167)
Time Spent: 1h 20m (was: 1h 10m)
> assert_that not working for streaming
> -------------------------------------
>
> Key: BEAM-3377
> URL: https://issues.apache.org/jira/browse/BEAM-3377
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Affects Versions: 2.2.0
> Reporter: María GH
> Priority: Major
> Labels: starter
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> assert_that does not work for AfterWatermark timers.
> Easy way to reproduce: modify test_gbk_execution [1] in this form:
>
> {code:java}
> def test_this(self):
> test_stream = (TestStream()
> .add_elements(['a', 'b', 'c'])
> .advance_watermark_to(20))
> def fnc(x):
> print 'fired_elem:', x
> return x
> options = PipelineOptions()
> options.view_as(StandardOptions).streaming = True
> p = TestPipeline(options=options)
> records = (p
> | test_stream
> | beam.WindowInto(
> FixedWindows(15),
>
> trigger=trigger.AfterWatermark(early=trigger.AfterCount(2)),
> accumulation_mode=trigger.AccumulationMode.ACCUMULATING)
> | beam.Map(lambda x: ('k', x))
> | beam.GroupByKey())
> assert_that(records, equal_to([
> ('k', ['a', 'b', 'c'])]))
> p.run()
> {code}
> This test will pass, but if the .advance_watermark_to(20) is removed, the
> test will fail. However, both cases fire the same elements:
> fired_elem: ('k', ['a', 'b', 'c'])
> fired_elem: ('k', ['a', 'b', 'c'])
> In the passing case, they correspond to the sorted_actual inside the
> assert_that. In the failing case:
> sorted_actual: [('k', ['a', 'b', 'c']), ('k', ['a', 'b', 'c'])]
> sorted_actual: []
> [1]
> https://github.com/mariapython/incubator-beam/blob/direct-timers-show/sdks/python/apache_beam/testing/test_stream_test.py#L120
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