[ 
https://issues.apache.org/jira/browse/BEAM-3377?focusedWorklogId=98790&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-98790
 ]

ASF GitHub Bot logged work on BEAM-3377:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 06/May/18 10:11
            Start Date: 06/May/18 10:11
    Worklog Time Spent: 10m 
      Work Description: mariapython commented on a change in pull request 
#5279: [BEAM-3377] Call assert_that per window via reify_windows flag
URL: https://github.com/apache/beam/pull/5279#discussion_r186285228
 
 

 ##########
 File path: sdks/python/apache_beam/testing/test_stream_test.py
 ##########
 @@ -410,17 +395,30 @@ def process(self,
         yield (elm, ts, side)
 
     records = (main_stream     # pylint: disable=unused-variable
-               | beam.ParDo(RecordFn(), beam.pvalue.AsList(side_stream))
-               | beam.Map(recorded_elements))
+               | beam.ParDo(RecordFn(), beam.pvalue.AsList(side_stream)))
     p.run()
 
-    # TODO(BEAM-3377): Remove after assert_that in streaming is fixed.
-    self.assertEqual([('a1', Timestamp(9), ['s1']),
-                      ('a2', Timestamp(9), ['s1']),
-                      ('a3', Timestamp(9), ['s1']),
-                      ('a4', Timestamp(9), ['s1']),
-                      ('b', Timestamp(9), ['s1']),
-                      ('c', Timestamp(18), ['s2'])], result)
+    assert_that(records, equal_to(
+        [TestWindowedValue(*args) for args in
+         [(('a1', Timestamp(9), ['s1']),
 
 Review comment:
   RecordFn() is needed in that test as it is helping incorporate side inputs 
(AsList).
   `records = (main_stream | beam.ParDo(RecordFn(), 
beam.pvalue.AsList(side_stream)))`
   ```
   SIDE                                 MAIN
   [1, 2, 3]                             
   |                                     |   
   Create                             TestStream
   |                                     |
   Map                                WindowInto
   |                                     |
   WindowInto                            |          
   |                  AsList             |   
   _____________________________  ParDo (RecordFn)
                                         |
                                         |    (assert_that below)
            [(None, None)]            WindowInto
                   |                     |
                 Create                 Map
                   |                     |
                   __________________  CoGBK
                                         |
                                        Map
                                         |
                                        Map
   ```
   

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Issue Time Tracking
-------------------

    Worklog Id:     (was: 98790)
    Time Spent: 1h 10m  (was: 1h)

> 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: MarĂ­a GH
>            Priority: Major
>              Labels: starter
>          Time Spent: 1h 10m
>  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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