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import pytz
from datetime import datetime
from task import apply_transform
from apache_beam.testing.test_pipeline import TestPipeline
from apache_beam.testing.test_stream import TestStream
from apache_beam.transforms import window
from apache_beam.options.pipeline_options import PipelineOptions
from apache_beam.options.pipeline_options import StandardOptions
from apache_beam.testing.util import assert_that, equal_to, equal_to_per_window
from test_helper import failed, passed, get_file_output, test_is_not_empty


def test_output():
    options = PipelineOptions()
    options.view_as(StandardOptions).streaming = True
    test_pipeline = TestPipeline(options=options)

    events = ( test_pipeline
               | TestStream()
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 1, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 2, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 3, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 4, 0, tzinfo=pytz.UTC).timestamp())
                    .advance_watermark_to(datetime(2021, 3, 1, 0, 0, 5, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 5, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 6, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 7, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 8, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 9, 0, tzinfo=pytz.UTC).timestamp())
                    .advance_watermark_to(datetime(2021, 3, 1, 0, 0, 10, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 10, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 11, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 12, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 13, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 14, 0, tzinfo=pytz.UTC).timestamp())
                    .advance_watermark_to(datetime(2021, 3, 1, 0, 0, 15, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 15, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 16, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 17, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 18, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 19, 0, tzinfo=pytz.UTC).timestamp())
                    .advance_watermark_to(datetime(2021, 3, 1, 0, 0, 20, 0, tzinfo=pytz.UTC).timestamp())
                    .add_elements(elements=["event"], event_timestamp=datetime(2021, 3, 1, 0, 0, 20, 0, tzinfo=pytz.UTC).timestamp())
                    .advance_watermark_to(datetime(2021, 3, 1, 0, 0, 25, 0, tzinfo=pytz.UTC).timestamp())
                    .advance_watermark_to_infinity())

    results = apply_transform(events)

    answers = {
        window.IntervalWindow(datetime(2021, 3, 1, 0, 0, 0, 0, tzinfo=pytz.UTC).timestamp(),
                              datetime(2021, 3, 1, 0, 0, 5, 0, tzinfo=pytz.UTC).timestamp()): [4],
        window.IntervalWindow(datetime(2021, 3, 1, 0, 0, 5, 0, tzinfo=pytz.UTC).timestamp(),
                              datetime(2021, 3, 1, 0, 0, 10, 0, tzinfo=pytz.UTC).timestamp()): [5],
        window.IntervalWindow(datetime(2021, 3, 1, 0, 0, 10, 0, tzinfo=pytz.UTC).timestamp(),
                              datetime(2021, 3, 1, 0, 0, 15, 0, tzinfo=pytz.UTC).timestamp()): [5],
        window.IntervalWindow(datetime(2021, 3, 1, 0, 0, 15, 0, tzinfo=pytz.UTC).timestamp(),
                              datetime(2021, 3, 1, 0, 0, 20, 0, tzinfo=pytz.UTC).timestamp()): [5],
        window.IntervalWindow(datetime(2021, 3, 1, 0, 0, 20, 0, tzinfo=pytz.UTC).timestamp(),
                              datetime(2021, 3, 1, 0, 0, 25, 0, tzinfo=pytz.UTC).timestamp()): [1],
    }

    assert_that(results,
                equal_to_per_window(answers),
                label='count assert per window')

    test_pipeline.run()


if __name__ == '__main__':
    test_is_not_empty()
    test_output()
