def model_composite_transform_example(contents, output_path):
"""Example of a composite transform.
To declare a composite transform, define a subclass of PTransform.
To override the apply method, define a method "apply" that
takes a PCollection as its only parameter and returns a PCollection.
"""
import re
import apache_beam as beam
# [START composite_transform_example]
# [START composite_ptransform_apply_method]
# [START composite_ptransform_declare]
class CountWords(beam.PTransform):
# [END composite_ptransform_declare]
def expand(self, pcoll):
return (pcoll
| beam.FlatMap(lambda x: re.findall(r'\w+', x))
| beam.combiners.Count.PerElement()
| beam.Map(lambda (word, c): '%s: %s' % (word, c)))
# [END composite_ptransform_apply_method]
# [END composite_transform_example]
p = TestPipeline() # Use TestPipeline for testing.
(p
| beam.Create(contents)
| CountWords()
| beam.io.WriteToText(output_path))
p.run()
def model_multiple_pcollections_flatten(contents, output_path):
"""Merging a PCollection with Flatten."""
some_hash_fn = lambda s: ord(s[0])
import apache_beam as beam
p = TestPipeline() # Use TestPipeline for testing.
partition_fn = lambda element, partitions: some_hash_fn(element) % partitions
# Partition into deciles
partitioned = p | beam.Create(contents) | beam.Partition(partition_fn, 3)
pcoll1 = partitioned[0]
pcoll2 = partitioned[1]
pcoll3 = partitioned[2]
# Flatten them back into 1
# A collection of PCollection objects can be represented simply
# as a tuple (or list) of PCollections.
# (The SDK for Python has no separate type to store multiple
# PCollection objects, whether containing the same or different
# types.)
# [START model_multiple_pcollections_flatten]
merged = (
(pcoll1, pcoll2, pcoll3)
# A list of tuples can be "piped" directly into a Flatten transform.
| beam.Flatten())
# [END model_multiple_pcollections_flatten]
merged | beam.io.WriteToText(output_path)
p.run()
def pipeline_logging(lines, output):
"""Logging Pipeline Messages."""
import re
import apache_beam as beam
# [START pipeline_logging]
# import Python logging module.
import logging
class ExtractWordsFn(beam.DoFn):
def process(self, element):
words = re.findall(r'[A-Za-z\']+', element)
for word in words:
yield word
if word.lower() == 'love':
# Log using the root logger at info or higher levels
logging.info('Found : %s', word.lower())
# Remaining WordCount example code ...
# [END pipeline_logging]
p = TestPipeline() # Use TestPipeline for testing.
(p
| beam.Create(lines)
| beam.ParDo(ExtractWordsFn())
| beam.io.WriteToText(output))
p.run()
def test_read_from_text_file_pattern(self): pattern, expected_data = write_pattern([5, 3, 12, 8, 8, 4]) assert len(expected_data) == 40 pipeline = TestPipeline() pcoll = pipeline | 'Read' >> ReadFromText(pattern) assert_that(pcoll, equal_to(expected_data)) pipeline.run()
def model_multiple_pcollections_partition(contents, output_path):
"""Splitting a PCollection with Partition."""
some_hash_fn = lambda s: ord(s[0])
def get_percentile(i):
"""Assume i in [0,100)."""
return i
import apache_beam as beam
p = TestPipeline() # Use TestPipeline for testing.
students = p | beam.Create(contents)
# [START model_multiple_pcollections_partition]
def partition_fn(student, num_partitions):
return int(get_percentile(student) * num_partitions / 100)
by_decile = students | beam.Partition(partition_fn, 10)
# [END model_multiple_pcollections_partition]
# [START model_multiple_pcollections_partition_40th]
fortieth_percentile = by_decile[4]
# [END model_multiple_pcollections_partition_40th]
([by_decile[d] for d in xrange(10) if d != 4] + [fortieth_percentile]
| beam.Flatten()
| beam.io.WriteToText(output_path))
p.run()
def test_window_preserved(self):
expected_timestamp = timestamp.Timestamp(5)
expected_window = window.IntervalWindow(1.0, 2.0)
class AddWindowDoFn(beam.DoFn):
def process(self, element):
yield WindowedValue(
element, expected_timestamp, [expected_window])
pipeline = TestPipeline()
data = [(1, 1), (2, 1), (3, 1), (1, 2), (2, 2), (1, 4)]
expected_windows = [
TestWindowedValue(kv, expected_timestamp, [expected_window])
for kv in data]
before_identity = (pipeline
| 'start' >> beam.Create(data)
| 'add_windows' >> beam.ParDo(AddWindowDoFn()))
assert_that(before_identity, equal_to(expected_windows),
label='before_identity', reify_windows=True)
after_identity = (before_identity
| 'window' >> beam.WindowInto(
beam.transforms.util._IdentityWindowFn(
coders.IntervalWindowCoder())))
assert_that(after_identity, equal_to(expected_windows),
label='after_identity', reify_windows=True)
pipeline.run()
def test_no_window_context_fails(self):
expected_timestamp = timestamp.Timestamp(5)
# Assuming the default window function is window.GlobalWindows.
expected_window = window.GlobalWindow()
class AddTimestampDoFn(beam.DoFn):
def process(self, element):
yield window.TimestampedValue(element, expected_timestamp)
pipeline = TestPipeline()
data = [(1, 1), (2, 1), (3, 1), (1, 2), (2, 2), (1, 4)]
expected_windows = [
TestWindowedValue(kv, expected_timestamp, [expected_window])
for kv in data]
before_identity = (pipeline
| 'start' >> beam.Create(data)
| 'add_timestamps' >> beam.ParDo(AddTimestampDoFn()))
assert_that(before_identity, equal_to(expected_windows),
label='before_identity', reify_windows=True)
after_identity = (before_identity
| 'window' >> beam.WindowInto(
beam.transforms.util._IdentityWindowFn(
coders.GlobalWindowCoder()))
# This DoFn will return TimestampedValues, making
# WindowFn.AssignContext passed to IdentityWindowFn
# contain a window of None. IdentityWindowFn should
# raise an exception.
| 'add_timestamps2' >> beam.ParDo(AddTimestampDoFn()))
assert_that(after_identity, equal_to(expected_windows),
label='after_identity', reify_windows=True)
with self.assertRaisesRegexp(ValueError, r'window.*None.*add_timestamps2'):
pipeline.run()
def test_timestamped_with_combiners(self):
p = TestPipeline()
result = (p
# Create some initial test values.
| 'start' >> Create([(k, k) for k in range(10)])
# The purpose of the WindowInto transform is to establish a
# FixedWindows windowing function for the PCollection.
# It does not bucket elements into windows since the timestamps
# from Create are not spaced 5 ms apart and very likely they all
# fall into the same window.
| 'w' >> WindowInto(FixedWindows(5))
# Generate timestamped values using the values as timestamps.
# Now there are values 5 ms apart and since Map propagates the
# windowing function from input to output the output PCollection
# will have elements falling into different 5ms windows.
| Map(lambda (x, t): TimestampedValue(x, t))
# We add a 'key' to each value representing the index of the
# window. This is important since there is no guarantee of
# order for the elements of a PCollection.
| Map(lambda v: (v / 5, v)))
# Sum all elements associated with a key and window. Although it
# is called CombinePerKey it is really CombinePerKeyAndWindow the
# same way GroupByKey is really GroupByKeyAndWindow.
sum_per_window = result | CombinePerKey(sum)
# Compute mean per key and window.
mean_per_window = result | combiners.Mean.PerKey()
assert_that(sum_per_window, equal_to([(0, 10), (1, 35)]),
label='assert:sum')
assert_that(mean_per_window, equal_to([(0, 2.0), (1, 7.0)]),
label='assert:mean')
p.run()
def test_setting_timestamp(self):
p = TestPipeline()
unkeyed_items = p | beam.Create([12, 30, 60, 61, 66])
items = (unkeyed_items | 'key' >> beam.Map(lambda x: ('k', x)))
def extract_timestamp_from_log_entry(entry):
return entry[1]
# [START setting_timestamp]
class AddTimestampDoFn(beam.DoFn):
def process(self, element):
# Extract the numeric Unix seconds-since-epoch timestamp to be
# associated with the current log entry.
unix_timestamp = extract_timestamp_from_log_entry(element)
# Wrap and emit the current entry and new timestamp in a
# TimestampedValue.
yield beam.window.TimestampedValue(element, unix_timestamp)
timestamped_items = items | 'timestamp' >> beam.ParDo(AddTimestampDoFn())
# [END setting_timestamp]
fixed_windowed_items = (
timestamped_items | 'window' >> beam.WindowInto(
beam.window.FixedWindows(60)))
summed = (fixed_windowed_items
| 'group' >> beam.GroupByKey()
| 'combine' >> beam.CombineValues(sum))
unkeyed = summed | 'unkey' >> beam.Map(lambda x: x[1])
assert_that(unkeyed, equal_to([42, 187]))
p.run()
def test_gbk_execution(self):
test_stream = (TestStream()
.advance_watermark_to(10)
.add_elements(['a', 'b', 'c'])
.advance_watermark_to(20)
.add_elements(['d'])
.add_elements(['e'])
.advance_processing_time(10)
.advance_watermark_to(300)
.add_elements([TimestampedValue('late', 12)])
.add_elements([TimestampedValue('last', 310)]))
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
records = (p
| test_stream
| beam.WindowInto(FixedWindows(15))
| beam.Map(lambda x: ('k', x))
| beam.GroupByKey())
# TODO(BEAM-2519): timestamp assignment for elements from a GBK should
# respect the TimestampCombiner. The test below should also verify the
# timestamps of the outputted elements once this is implemented.
assert_that(records, equal_to([
('k', ['a', 'b', 'c']),
('k', ['d', 'e']),
('k', ['late']),
('k', ['last'])]))
p.run()
def test_to_list_and_to_dict(self):
pipeline = TestPipeline()
the_list = [6, 3, 1, 1, 9, 1, 5, 2, 0, 6]
pcoll = pipeline | 'start' >> Create(the_list)
result = pcoll | 'to list' >> combine.ToList()
def matcher(expected):
def match(actual):
equal_to(expected[0])(actual[0])
return match
assert_that(result, matcher([the_list]))
pipeline.run()
pipeline = TestPipeline()
pairs = [(1, 2), (3, 4), (5, 6)]
pcoll = pipeline | 'start-pairs' >> Create(pairs)
result = pcoll | 'to dict' >> combine.ToDict()
def matcher():
def match(actual):
equal_to([1])([len(actual)])
equal_to(pairs)(actual[0].iteritems())
return match
assert_that(result, matcher())
pipeline.run()
def test_run_direct(self):
file_name = self._create_temp_file('aaaa\nbbbb\ncccc\ndddd')
pipeline = TestPipeline()
pcoll = pipeline | beam.io.Read(LineSource(file_name))
assert_that(pcoll, equal_to(['aaaa', 'bbbb', 'cccc', 'dddd']))
pipeline.run()
def test_reshuffle_window_fn_preserved(self):
pipeline = TestPipeline()
data = [(1, 1), (2, 1), (3, 1), (1, 2), (2, 2), (1, 4)]
expected_windows = [TestWindowedValue(v, t, [w]) for (v, t, w) in [
((1, 1), 1.0, IntervalWindow(1.0, 3.0)),
((2, 1), 1.0, IntervalWindow(1.0, 3.0)),
((3, 1), 1.0, IntervalWindow(1.0, 3.0)),
((1, 2), 2.0, IntervalWindow(2.0, 4.0)),
((2, 2), 2.0, IntervalWindow(2.0, 4.0)),
((1, 4), 4.0, IntervalWindow(4.0, 6.0))]]
expected_merged_windows = [TestWindowedValue(v, t, [w]) for (v, t, w) in [
((1, contains_in_any_order([2, 1])), 4.0, IntervalWindow(1.0, 4.0)),
((2, contains_in_any_order([2, 1])), 4.0, IntervalWindow(1.0, 4.0)),
((3, [1]), 3.0, IntervalWindow(1.0, 3.0)),
((1, [4]), 6.0, IntervalWindow(4.0, 6.0))]]
before_reshuffle = (pipeline
| 'start' >> beam.Create(data)
| 'add_timestamp' >> beam.Map(
lambda v: TimestampedValue(v, v[1]))
| 'window' >> beam.WindowInto(Sessions(gap_size=2)))
assert_that(before_reshuffle, equal_to(expected_windows),
label='before_reshuffle', reify_windows=True)
after_reshuffle = (before_reshuffle
| 'reshuffle' >> beam.Reshuffle())
assert_that(after_reshuffle, equal_to(expected_windows),
label='after_reshuffle', reify_windows=True)
after_group = (after_reshuffle
| 'group_by_key' >> beam.GroupByKey())
assert_that(after_group, equal_to(expected_merged_windows),
label='after_group', reify_windows=True)
pipeline.run()
def run_pipeline(self, count_implementation, factor=1):
p = TestPipeline()
words = p | beam.Create(['CAT', 'DOG', 'CAT', 'CAT', 'DOG'])
result = words | count_implementation
assert_that(
result, equal_to([('CAT', (3 * factor)), ('DOG', (2 * factor))]))
p.run()
def model_co_group_by_key_tuple(email_list, phone_list, output_path):
"""Applying a CoGroupByKey Transform to a tuple."""
import apache_beam as beam
p = TestPipeline() # Use TestPipeline for testing.
# [START model_group_by_key_cogroupbykey_tuple]
# Each data set is represented by key-value pairs in separate PCollections.
# Both data sets share a common key type (in this example str).
# The email_list contains values such as: ('joe', '*****@*****.**') with
# multiple possible values for each key.
# The phone_list contains values such as: ('mary': '111-222-3333') with
# multiple possible values for each key.
emails = p | 'email' >> beam.Create(email_list)
phones = p | 'phone' >> beam.Create(phone_list)
# The result PCollection contains one key-value element for each key in the
# input PCollections. The key of the pair will be the key from the input and
# the value will be a dictionary with two entries: 'emails' - an iterable of
# all values for the current key in the emails PCollection and 'phones': an
# iterable of all values for the current key in the phones PCollection.
# For instance, if 'emails' contained ('joe', '*****@*****.**') and
# ('joe', '*****@*****.**'), then 'result' will contain the element
# ('joe', {'emails': ['*****@*****.**', '*****@*****.**'], 'phones': ...})
result = {'emails': emails, 'phones': phones} | beam.CoGroupByKey()
def join_info((name, info)):
return '; '.join(['%s' % name,
'%s' % ','.join(info['emails']),
'%s' % ','.join(info['phones'])])
contact_lines = result | beam.Map(join_info)
# [END model_group_by_key_cogroupbykey_tuple]
contact_lines | beam.io.WriteToText(output_path)
p.run()
def test_write_messages_unsupported_features(self, mock_pubsub):
data = b'data'
attributes = {'key': 'value'}
payloads = [PubsubMessage(data, attributes)]
options = PipelineOptions([])
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
_ = (p
| Create(payloads)
| WriteToPubSub('projects/fakeprj/topics/a_topic',
id_label='a_label'))
with self.assertRaisesRegexp(NotImplementedError,
r'id_label is not supported'):
p.run()
options = PipelineOptions([])
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
_ = (p
| Create(payloads)
| WriteToPubSub('projects/fakeprj/topics/a_topic',
timestamp_attribute='timestamp'))
with self.assertRaisesRegexp(NotImplementedError,
r'timestamp_attribute is not supported'):
p.run()
def test_runtime_checks_on(self):
# pylint: disable=expression-not-assigned
p = TestPipeline(options=PipelineOptions(runtime_type_check=True))
with self.assertRaises(typehints.TypeCheckError):
# [START type_hints_runtime_on]
p | beam.Create(['a']) | beam.Map(lambda x: 3).with_output_types(str)
p.run()
def test_compute_top_sessions(self):
p = TestPipeline()
edits = p | beam.Create(self.EDITS)
result = edits | top_wikipedia_sessions.ComputeTopSessions(1.0)
assert_that(result, equal_to(self.EXPECTED))
p.run()
def test_read_messages_timestamp_attribute_rfc3339_success(self, mock_pubsub):
data = 'data'
message_id = 'message_id'
attributes = {'time': '2018-03-12T13:37:01.234567Z'}
publish_time = '2018-03-12T13:37:01.234567Z'
payloads = [
create_client_message(data, message_id, attributes, publish_time)]
expected_elements = [
TestWindowedValue(
PubsubMessage(data, attributes),
timestamp.Timestamp.from_rfc3339(attributes['time']),
[window.GlobalWindow()]),
]
mock_pubsub.Client = functools.partial(FakePubsubClient, payloads)
mock_pubsub.subscription.AutoAck = FakeAutoAck
p = TestPipeline()
p.options.view_as(StandardOptions).streaming = True
pcoll = (p
| ReadFromPubSub(
'projects/fakeprj/topics/a_topic', None, 'a_label',
with_attributes=True, timestamp_attribute='time'))
assert_that(pcoll, equal_to(expected_elements), reify_windows=True)
p.run()
def test_basic_execution(self):
test_stream = (TestStream()
.advance_watermark_to(10)
.add_elements(['a', 'b', 'c'])
.advance_watermark_to(20)
.add_elements(['d'])
.add_elements(['e'])
.advance_processing_time(10)
.advance_watermark_to(300)
.add_elements([TimestampedValue('late', 12)])
.add_elements([TimestampedValue('last', 310)]))
class RecordFn(beam.DoFn):
def process(self, element=beam.DoFn.ElementParam,
timestamp=beam.DoFn.TimestampParam):
yield (element, timestamp)
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
my_record_fn = RecordFn()
records = p | test_stream | beam.ParDo(my_record_fn)
assert_that(records, equal_to([
('a', timestamp.Timestamp(10)),
('b', timestamp.Timestamp(10)),
('c', timestamp.Timestamp(10)),
('d', timestamp.Timestamp(20)),
('e', timestamp.Timestamp(20)),
('late', timestamp.Timestamp(12)),
('last', timestamp.Timestamp(310)),]))
p.run()
def test_read_messages_timestamp_attribute_missing(self, mock_pubsub):
data = 'data'
attributes = {}
publish_time_secs = 1520861821
publish_time_nanos = 234567000
publish_time = '2018-03-12T13:37:01.234567Z'
ack_id = 'ack_id'
pull_response = test_utils.create_pull_response([
test_utils.PullResponseMessage(
data, attributes, publish_time_secs, publish_time_nanos, ack_id)
])
expected_elements = [
TestWindowedValue(
PubsubMessage(data, attributes),
timestamp.Timestamp.from_rfc3339(publish_time),
[window.GlobalWindow()]),
]
mock_pubsub.return_value.pull.return_value = pull_response
p = TestPipeline()
p.options.view_as(StandardOptions).streaming = True
pcoll = (p
| ReadFromPubSub(
'projects/fakeprj/topics/a_topic', None, None,
with_attributes=True, timestamp_attribute='nonexistent'))
assert_that(pcoll, equal_to(expected_elements), reify_windows=True)
p.run()
mock_pubsub.return_value.acknowledge.assert_has_calls([
mock.call(mock.ANY, [ack_id])])
def test_read_messages_timestamp_attribute_milli_success(self, mock_pubsub):
data = b'data'
attributes = {'time': '1337'}
publish_time_secs = 1520861821
publish_time_nanos = 234567000
ack_id = 'ack_id'
pull_response = test_utils.create_pull_response([
test_utils.PullResponseMessage(
data, attributes, publish_time_secs, publish_time_nanos, ack_id)
])
expected_elements = [
TestWindowedValue(
PubsubMessage(data, attributes),
timestamp.Timestamp(micros=int(attributes['time']) * 1000),
[window.GlobalWindow()]),
]
mock_pubsub.return_value.pull.return_value = pull_response
options = PipelineOptions([])
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
pcoll = (p
| ReadFromPubSub(
'projects/fakeprj/topics/a_topic', None, None,
with_attributes=True, timestamp_attribute='time'))
assert_that(pcoll, equal_to(expected_elements), reify_windows=True)
p.run()
mock_pubsub.return_value.acknowledge.assert_has_calls([
mock.call(mock.ANY, [ack_id])])
def test_basic_execution_sideinputs(self):
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
main_stream = (p
| 'main TestStream' >> TestStream()
.advance_watermark_to(10)
.add_elements(['e']))
side_stream = (p
| 'side TestStream' >> TestStream()
.add_elements([window.TimestampedValue(2, 2)])
.add_elements([window.TimestampedValue(1, 1)])
.add_elements([window.TimestampedValue(7, 7)])
.add_elements([window.TimestampedValue(4, 4)])
)
class RecordFn(beam.DoFn):
def process(self,
elm=beam.DoFn.ElementParam,
ts=beam.DoFn.TimestampParam,
side=beam.DoFn.SideInputParam):
yield (elm, ts, side)
records = (main_stream # pylint: disable=unused-variable
| beam.ParDo(RecordFn(), beam.pvalue.AsList(side_stream)))
assert_that(records, equal_to([('e', Timestamp(10), [2, 1, 7, 4])]))
p.run()
def test_on_direct_runner(self):
class FakeSink(NativeSink):
"""A fake sink outputing a number of elements."""
def __init__(self):
self.written_values = []
self.writer_instance = FakeSinkWriter(self.written_values)
def writer(self):
return self.writer_instance
class FakeSinkWriter(NativeSinkWriter):
"""A fake sink writer for testing."""
def __init__(self, written_values):
self.written_values = written_values
def __enter__(self):
return self
def __exit__(self, *unused_args):
pass
def Write(self, value):
self.written_values.append(value)
p = TestPipeline()
sink = FakeSink()
p | Create(['a', 'b', 'c']) | _NativeWrite(sink) # pylint: disable=expression-not-assigned
p.run()
self.assertEqual(['a', 'b', 'c'], sink.written_values)
def test_read_from_text_single_file(self): file_name, expected_data = write_data(5) assert len(expected_data) == 5 pipeline = TestPipeline() pcoll = pipeline | 'Read' >> ReadFromText(file_name) assert_that(pcoll, equal_to(expected_data)) pipeline.run()
def test_read_from_text_with_file_name_single_file(self): file_name, data = write_data(5) expected_data = [(file_name, el) for el in data] assert len(expected_data) == 5 pipeline = TestPipeline() pcoll = pipeline | 'Read' >> ReadFromTextWithFilename(file_name) assert_that(pcoll, equal_to(expected_data)) pipeline.run()
def test_read_all_single_file(self):
file_name, expected_data = write_data(5)
assert len(expected_data) == 5
pipeline = TestPipeline()
pcoll = pipeline | 'Create' >> Create(
[file_name]) |'ReadAll' >> ReadAllFromText()
assert_that(pcoll, equal_to(expected_data))
pipeline.run()
def test_reshuffle_contents_unchanged(self):
pipeline = TestPipeline()
data = [(1, 1), (2, 1), (3, 1), (1, 2), (2, 2), (1, 3)]
result = (pipeline
| 'start' >> beam.Create(data)
| 'reshuffle' >> beam.Reshuffle())
assert_that(result, equal_to(data))
pipeline.run()
def test_pipeline_read_single_file(self):
with TempDir() as tempdir:
file_name = self._create_temp_vcf_file(_SAMPLE_HEADER_LINES +
_SAMPLE_TEXT_LINES, tempdir)
pipeline = TestPipeline()
pcoll = pipeline | 'Read' >> ReadFromVcf(file_name)
assert_that(pcoll, _count_equals_to(len(_SAMPLE_TEXT_LINES)))
pipeline.run()
def test_read_message_id_label_unsupported(self, unused_mock_pubsub):
# id_label is unsupported in DirectRunner.
p = TestPipeline()
p.options.view_as(StandardOptions).streaming = True
_ = (p | ReadFromPubSub('projects/fakeprj/topics/a_topic', None, 'a_label'))
with self.assertRaisesRegexp(NotImplementedError,
r'id_label is not supported'):
p.run()
def test_top_py2(self):
pipeline = TestPipeline()
# A parameter we'll be sharing with a custom comparator.
names = {
0: 'zo',
1: 'one',
2: 'twoo',
3: 'three',
5: 'fiiive',
6: 'sssssix',
9: 'nniiinne'
}
# First for global combines.
pcoll = pipeline | 'start' >> Create([6, 3, 1, 1, 9, 1, 5, 2, 0, 6])
result_cmp = pcoll | 'cmp' >> combine.Top.Of(
6, lambda a, b, names: len(names[a]) < len(names[b]),
names) # Note parameter passed to comparator.
result_cmp_rev = pcoll | 'cmp_rev' >> combine.Top.Of(
3,
lambda a, b, names: len(names[a]) < len(names[b]),
names, # Note parameter passed to comparator.
reverse=True)
assert_that(result_cmp,
equal_to([[9, 6, 6, 5, 3, 2]]),
label='assert:cmp')
assert_that(result_cmp_rev,
equal_to([[0, 1, 1]]),
label='assert:cmp_rev')
# Again for per-key combines.
pcoll = pipeline | 'start-perkye' >> Create(
[('a', x) for x in [6, 3, 1, 1, 9, 1, 5, 2, 0, 6]])
result_key_cmp = pcoll | 'cmp-perkey' >> combine.Top.PerKey(
6, lambda a, b, names: len(names[a]) < len(names[b]),
names) # Note parameter passed to comparator.
assert_that(result_key_cmp,
equal_to([('a', [9, 6, 6, 5, 3, 2])]),
label='key:cmp')
pipeline.run()
def test_multiple_outputs(self):
"""Tests that the TestStream supports emitting to multiple PCollections."""
letters_elements = [
TimestampedValue('a', 6),
TimestampedValue('b', 7),
TimestampedValue('c', 8),
]
numbers_elements = [
TimestampedValue('1', 11),
TimestampedValue('2', 12),
TimestampedValue('3', 13),
]
test_stream = (TestStream()
.advance_watermark_to(5, tag='letters')
.add_elements(letters_elements, tag='letters')
.advance_watermark_to(10, tag='numbers')
.add_elements(numbers_elements, tag='numbers')) # yapf: disable
class RecordFn(beam.DoFn):
def process(self,
element=beam.DoFn.ElementParam,
timestamp=beam.DoFn.TimestampParam):
yield (element, timestamp)
options = StandardOptions(streaming=True)
p = TestPipeline(options=options)
main = p | test_stream
letters = main['letters'] | 'record letters' >> beam.ParDo(RecordFn())
numbers = main['numbers'] | 'record numbers' >> beam.ParDo(RecordFn())
assert_that(letters,
equal_to([('a', Timestamp(6)), ('b', Timestamp(7)),
('c', Timestamp(8))]),
label='assert letters')
assert_that(numbers,
equal_to([('1', Timestamp(11)), ('2', Timestamp(12)),
('3', Timestamp(13))]),
label='assert numbers')
p.run()
def test_read_with_query_batch(self, mock_batch_snapshot_class,
mock_client_class):
mock_snapshot = mock.MagicMock()
mock_snapshot.generate_query_batches.return_value = [{
'query': {
'sql': 'SELECT * FROM users'
},
'partition':
'test_partition'
} for _ in range(3)]
mock_snapshot.process_query_batch.side_effect = [
FAKE_ROWS[0:2], FAKE_ROWS[2:4], FAKE_ROWS[4:]
]
ro = [ReadOperation.query("Select * from users")]
pipeline = TestPipeline()
read = (pipeline
| 'read' >> ReadFromSpanner(TEST_PROJECT_ID,
TEST_INSTANCE_ID,
_generate_database_name(),
sql="SELECT * FROM users"))
readall = (pipeline
| 'read all' >> ReadFromSpanner(TEST_PROJECT_ID,
TEST_INSTANCE_ID,
_generate_database_name(),
read_operations=ro))
readpipeline = (
pipeline
| 'create reads' >> beam.Create(ro)
| 'reads' >> ReadFromSpanner(TEST_PROJECT_ID, TEST_INSTANCE_ID,
_generate_database_name()))
pipeline.run()
assert_that(read, equal_to(FAKE_ROWS), label='checkRead')
assert_that(readall, equal_to(FAKE_ROWS), label='checkReadAll')
assert_that(readpipeline,
equal_to(FAKE_ROWS),
label='checkReadPipeline')
def test_gbk_execution_no_triggers(self):
test_stream = (TestStream().advance_watermark_to(10).add_elements([
'a', 'b', 'c'
]).advance_watermark_to(20).add_elements(['d']).add_elements([
'e'
]).advance_processing_time(10).advance_watermark_to(300).add_elements([
TimestampedValue('late', 12)
]).add_elements([TimestampedValue('last', 310)
]).advance_watermark_to_infinity())
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
records = (p
| test_stream
| beam.WindowInto(FixedWindows(15), allowed_lateness=300)
| beam.Map(lambda x: ('k', x))
| beam.GroupByKey())
# TODO(https://github.com/apache/beam/issues/18441): timestamp assignment
# for elements from a GBK should respect the TimestampCombiner. The test
# below should also verify the timestamps of the outputted elements once
# this is implemented.
# assert per window
expected_window_to_elements = {
window.IntervalWindow(0, 15): [
('k', ['a', 'b', 'c']),
('k', ['late']),
],
window.IntervalWindow(15, 30): [
('k', ['d', 'e']),
],
window.IntervalWindow(300, 315): [
('k', ['last']),
],
}
assert_that(records,
equal_to_per_window(expected_window_to_elements),
label='assert per window')
p.run()
def test_gbk_execution_after_processing_trigger_fired(self):
"""Advance TestClock to (X + delta) and see the pipeline does finish."""
# TODO(mariagh): Add test_gbk_execution_after_processing_trigger_unfired
# Advance TestClock to (X + delta) and see the pipeline does finish
# Possibly to the framework trigger_transcripts.yaml
test_stream = (TestStream()
.advance_watermark_to(10)
.add_elements(['a'])
.advance_processing_time(5.1))
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
records = (p
| test_stream
| beam.WindowInto(
beam.window.FixedWindows(15),
trigger=trigger.AfterProcessingTime(5),
accumulation_mode=trigger.AccumulationMode.DISCARDING
)
| beam.Map(lambda x: ('k', x))
| beam.GroupByKey())
# TODO(BEAM-2519): timestamp assignment for elements from a GBK should
# respect the TimestampCombiner. The test below should also verify the
# timestamps of the outputted elements once this is implemented.
assert_that(records, equal_to([
('k', ['a'])]))
# assert per window
expected_window_to_elements = {
window.IntervalWindow(15, 30): [('k', ['a'])],
}
assert_that(
records,
equal_to_per_window(expected_window_to_elements),
custom_windowing=window.FixedWindows(15),
label='assert per window')
p.run()
def testCalculateProgramMetricCombinations(self):
"""Tests the CalculateProgramMetricCombinations DoFn."""
fake_person = StatePerson.new_with_defaults(
person_id=123,
gender=Gender.MALE,
birthdate=date(1970, 1, 1),
residency_status=ResidencyStatus.PERMANENT)
program_events = [
ProgramReferralEvent(
state_code='US_TX',
event_date=date(2011, 4, 3),
program_id='program',
participation_status=StateProgramAssignmentParticipationStatus.
IN_PROGRESS),
ProgramParticipationEvent(state_code='US_TX',
event_date=date(2011, 6, 3),
program_id='program')
]
# Each event will be have an output for each methodology type
expected_metric_count = 2
expected_combination_counts = \
{'referrals': expected_metric_count,
'participation': expected_metric_count}
test_pipeline = TestPipeline()
output = (test_pipeline
| beam.Create([(fake_person, program_events)])
| 'Calculate Program Metrics' >> beam.ParDo(
pipeline.CalculateProgramMetricCombinations(), None, -1,
ALL_METRIC_INCLUSIONS_DICT))
assert_that(
output,
AssertMatchers.count_combinations(expected_combination_counts),
'Assert number of metrics is expected value')
test_pipeline.run()
def test_top(self):
pipeline = TestPipeline()
# First for global combines.
pcoll = pipeline | 'start' >> Create([6, 3, 1, 1, 9, 1, 5, 2, 0, 6])
result_top = pcoll | 'top' >> combine.Top.Largest(5)
result_bot = pcoll | 'bot' >> combine.Top.Smallest(4)
assert_that(result_top, equal_to([[9, 6, 6, 5, 3]]), label='assert:top')
assert_that(result_bot, equal_to([[0, 1, 1, 1]]), label='assert:bot')
# Again for per-key combines.
pcoll = pipeline | 'start-perkey' >> Create(
[('a', x) for x in [6, 3, 1, 1, 9, 1, 5, 2, 0, 6]])
result_key_top = pcoll | 'top-perkey' >> combine.Top.LargestPerKey(5)
result_key_bot = pcoll | 'bot-perkey' >> combine.Top.SmallestPerKey(4)
assert_that(result_key_top, equal_to([('a', [9, 6, 6, 5, 3])]),
label='key:top')
assert_that(result_key_bot, equal_to([('a', [0, 1, 1, 1])]),
label='key:bot')
pipeline.run()
def test_convert_variant_to_bigquery_row(self):
variant_1, row_1 = self._get_sample_variant_1()
variant_2, row_2 = self._get_sample_variant_2()
variant_3, row_3 = self._get_sample_variant_3()
header_fields = vcf_header_parser.HeaderFields({}, {})
proc_var_1 = processed_variant.ProcessedVariantFactory(
header_fields).create_processed_variant(variant_1)
proc_var_2 = processed_variant.ProcessedVariantFactory(
header_fields).create_processed_variant(variant_2)
proc_var_3 = processed_variant.ProcessedVariantFactory(
header_fields).create_processed_variant(variant_3)
pipeline = TestPipeline()
bigquery_rows = (
pipeline
| Create([proc_var_1, proc_var_2, proc_var_3])
| 'ConvertToRow' >> ParDo(
ConvertToBigQueryTableRow(
mock_bigquery_schema_descriptor.MockSchemaDescriptor())))
assert_that(bigquery_rows, equal_to([row_1, row_2, row_3]))
pipeline.run()
def test_partition_variants(self):
expected_partitions = self._get_standard_variant_partitions()
expected_partitions.update(self._get_nonstandard_variant_partitions())
variants = [
variant for variant_list in expected_partitions.values()
for variant in variant_list
]
partitioner = variant_partition.VariantPartition()
pipeline = TestPipeline()
partitions = (pipeline
| Create(variants)
| 'PartitionVariants' >> Partition(
partition_variants.PartitionVariants(partitioner),
partitioner.get_num_partitions()))
for i in xrange(partitioner.get_num_partitions()):
assert_that(partitions[i],
equal_to(expected_partitions.get(i, [])),
label=str(i))
pipeline.run()
def test_approximate_unique_global_by_sample_size_with_duplicates(self):
# test if estimation error with a given sample size is not greater than
# expected max error with duplicated input.
sample_size = 30
max_err = 2 / math.sqrt(sample_size)
test_input = [10] * 50 + [20] * 50
actual_count = len(set(test_input))
pipeline = TestPipeline()
result = (pipeline
| 'create' >> beam.Create(test_input)
| 'get_estimate'
>> beam.ApproximateUnique.Globally(size=sample_size)
| 'compare'
>> beam.FlatMap(lambda x: [abs(x - actual_count) * 1.0
/ actual_count <= max_err]))
assert_that(result, equal_to([True]),
label='assert:global_by_size_with_duplicates')
pipeline.run()
def test_metrics_in_fake_source(self):
# FakeSource mock requires DirectRunner.
pipeline = TestPipeline(runner='DirectRunner')
pcoll = pipeline | Read(FakeSource([1, 2, 3, 4, 5, 6]))
assert_that(pcoll, equal_to([1, 2, 3, 4, 5, 6]))
res = pipeline.run()
metric_results = res.metrics().query()
outputs_counter = metric_results['counters'][0]
self.assertEqual(outputs_counter.key.step, 'Read')
self.assertEqual(outputs_counter.key.metric.name, 'outputs')
self.assertEqual(outputs_counter.committed, 6)
def test_kafkaio_write(self):
local_kafka_jar = os.environ.get('LOCAL_KAFKA_JAR')
with self.local_kafka_service(local_kafka_jar) as kafka_port:
p = TestPipeline()
p.not_use_test_runner_api = True
xlang_kafkaio = CrossLanguageKafkaIO(
'%s:%s' % (self.get_platform_localhost(), kafka_port),
'xlang_kafkaio_test')
xlang_kafkaio.build_write_pipeline(p)
job = p.run()
job.wait_until_finish()
def testClassifyIncarcerationEvents_NoSentenceGroups(self):
"""Tests the ClassifyIncarcerationEvents DoFn when the person has no sentence groups."""
fake_person = StatePerson.new_with_defaults(
person_id=123,
gender=Gender.MALE,
birthdate=date(1970, 1, 1),
residency_status=ResidencyStatus.PERMANENT)
person_periods = {'person': [fake_person], 'sentence_groups': []}
test_pipeline = TestPipeline()
output = (test_pipeline
| beam.Create([(fake_person.person_id, person_periods)])
| 'Identify Incarceration Events' >> beam.ParDo(
pipeline.ClassifyIncarcerationEvents(), {}))
assert_that(output, equal_to([]))
test_pipeline.run()
def test_read_data_success(self, mock_pubsub):
data_encoded = u'🤷 ¯\\_(ツ)_/¯'.encode('utf-8')
ack_id = 'ack_id'
pull_response = test_utils.create_pull_response([
test_utils.PullResponseMessage(data_encoded, ack_id=ack_id)])
expected_elements = [data_encoded]
mock_pubsub.return_value.pull.return_value = pull_response
options = PipelineOptions([])
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
pcoll = (p
| ReadFromPubSub('projects/fakeprj/topics/a_topic', None, None))
assert_that(pcoll, equal_to(expected_elements))
p.run()
mock_pubsub.return_value.acknowledge.assert_has_calls([
mock.call(mock.ANY, [ack_id])])
mock_pubsub.return_value.api.transport.channel.close.assert_has_calls([
mock.call()])
def test_approximate_unique_global_by_sample_size_with_big_population(self):
# test if estimation error is smaller than expected max error with a small
# sample and a big population (sample size = 1% of population).
sample_size = 100
max_err = 2 / math.sqrt(sample_size)
test_input = [random.randint(0, 1000) for _ in range(10000)]
actual_count = len(set(test_input))
pipeline = TestPipeline()
result = (pipeline
| 'create' >> beam.Create(test_input)
| 'get_estimate'
>> beam.ApproximateUnique.Globally(size=sample_size)
| 'compare'
>> beam.FlatMap(lambda x: [abs(x - actual_count) * 1.0
/ actual_count <= max_err]))
assert_that(result, equal_to([True]),
label='assert:global_by_sample_size_with_big_population')
pipeline.run()
def test_shard_variants(self):
expected_shards = self._get_expected_variant_shards()
variants = [variant
for variant_list in expected_shards.values()
for variant in variant_list]
sharding = variant_sharding.VariantSharding(
'gcp_variant_transforms/data/sharding_configs/'
'homo_sapiens_default.yaml')
pipeline = TestPipeline()
shards = (
pipeline
| Create(variants, reshuffle=False)
| 'ShardVariants' >> beam.Partition(
shard_variants.ShardVariants(sharding),
sharding.get_num_shards()))
for i in range(sharding.get_num_shards()):
assert_that(shards[i], equal_to(expected_shards.get(i, [])),
label=str(i))
pipeline.run()
def test_densify_variants_pipeline(self):
call_names = ['sample1', 'sample2', 'sample3']
variant_calls = [
vcfio.VariantCall(name=call_names[0]),
vcfio.VariantCall(name=call_names[1]),
vcfio.VariantCall(name=call_names[2]),
]
variants = [
vcfio.Variant(calls=[variant_calls[0], variant_calls[1]]),
vcfio.Variant(calls=[variant_calls[1], variant_calls[2]]),
]
pipeline = TestPipeline()
densified_variants = (
pipeline
| Create(variants)
| 'DensifyVariants' >> densify_variants.DensifyVariants())
assert_that(densified_variants, asserts.has_calls(call_names))
pipeline.run()
def test_read_pattern_gzip(self):
_, lines = write_data(200)
splits = [0, 34, 100, 140, 164, 188, 200]
chunks = [
lines[splits[i - 1]:splits[i]] for i in range(1, len(splits))
]
compressed_chunks = []
for c in chunks:
out = io.BytesIO()
with gzip.GzipFile(fileobj=out, mode="wb") as f:
f.write(b'\n'.join(c))
compressed_chunks.append(out.getvalue())
file_pattern = write_prepared_pattern(compressed_chunks)
pipeline = TestPipeline()
pcoll = pipeline | 'Read' >> beam.io.Read(
LineSource(file_pattern,
splittable=False,
compression_type=CompressionTypes.GZIP))
assert_that(pcoll, equal_to(lines))
pipeline.run()
def testProduceViolationMetricsNoInput(self) -> None:
"""Tests the ProduceViolationMetrics when there is no input to the function."""
test_pipeline = TestPipeline()
output = (test_pipeline
| beam.Create([])
| beam.ParDo(ExtractPersonEventsMetadata())
| "Produce ViolationMetrics" >> beam.ParDo(
ProduceMetrics(),
self.pipeline_config,
ALL_METRIC_INCLUSIONS_DICT,
test_pipeline_options(),
None,
-1,
))
assert_that(output, equal_to([]))
test_pipeline.run()
def test_call_names_combiner_pipeline_preserve_call_names_order_error(
self):
call_names = ['sample1', 'sample2', 'sample3']
variant_calls = [
vcfio.VariantCall(name=call_names[0]),
vcfio.VariantCall(name=call_names[1]),
vcfio.VariantCall(name=call_names[2])
]
variants = [
vcfio.Variant(calls=[variant_calls[0], variant_calls[1]]),
vcfio.Variant(calls=[variant_calls[1], variant_calls[2]])
]
pipeline = TestPipeline()
_ = (pipeline
| transforms.Create(variants)
| 'CombineCallNames' >> combine_call_names.CallNamesCombiner(
preserve_call_names_order=True))
with self.assertRaises(ValueError):
pipeline.run()
def test_pipeline_read_file_pattern(self):
with temp_dir.TempDir() as tempdir:
headers_1 = [self.lines[1], self.lines[-1]]
headers_2 = [self.lines[2], self.lines[3], self.lines[-1]]
headers_3 = [self.lines[4], self.lines[-1]]
file_name_1 = tempdir.create_temp_file(suffix='.vcf', lines=headers_1)
file_name_2 = tempdir.create_temp_file(suffix='.vcf', lines=headers_2)
file_name_3 = tempdir.create_temp_file(suffix='.vcf', lines=headers_3)
pipeline = TestPipeline()
pcoll = pipeline | 'ReadHeaders' >> ReadVcfHeaders(
os.path.join(tempdir.get_path(), '*.vcf'))
expected = [_get_vcf_header_from_lines(h, file_name=file_name)
for h, file_name in [(headers_1, file_name_1),
(headers_2, file_name_2),
(headers_3, file_name_3)]]
assert_that(pcoll, asserts.header_vars_equal(expected))
pipeline.run()
def test_reshuffle_windows_unchanged(self):
pipeline = TestPipeline()
data = [(1, 1), (2, 1), (3, 1), (1, 2), (2, 2), (1, 4)]
expected_data = [TestWindowedValue(v, t, [w]) for (v, t, w) in [
((1, contains_in_any_order([2, 1])), 4.0, IntervalWindow(1.0, 4.0)),
((2, contains_in_any_order([2, 1])), 4.0, IntervalWindow(1.0, 4.0)),
((3, [1]), 3.0, IntervalWindow(1.0, 3.0)),
((1, [4]), 6.0, IntervalWindow(4.0, 6.0))]]
before_reshuffle = (pipeline
| 'start' >> beam.Create(data)
| 'add_timestamp' >> beam.Map(
lambda v: beam.window.TimestampedValue(v, v[1]))
| 'window' >> beam.WindowInto(Sessions(gap_size=2))
| 'group_by_key' >> beam.GroupByKey())
assert_that(before_reshuffle, equal_to(expected_data),
label='before_reshuffle', reify_windows=True)
after_reshuffle = before_reshuffle | beam.Reshuffle()
assert_that(after_reshuffle, equal_to(expected_data),
label='after reshuffle', reify_windows=True)
pipeline.run()
def test_reshuffle_sliding_window(self):
pipeline = TestPipeline()
data = [(1, 1), (2, 1), (3, 1), (1, 2), (2, 2), (1, 4)]
window_size = 2
expected_data = [(1, [1, 2, 4]), (2, [1, 2]), (3, [1])] * window_size
before_reshuffle = (pipeline
| 'start' >> beam.Create(data)
| 'window' >> beam.WindowInto(
SlidingWindows(size=window_size, period=1))
| 'group_by_key' >> beam.GroupByKey())
assert_that(before_reshuffle,
equal_to(expected_data),
label='before_reshuffle')
after_reshuffle = (before_reshuffle | 'reshuffle' >> beam.Reshuffle())
# If Reshuffle applies the sliding window function a second time there
# should be extra values for each key.
assert_that(after_reshuffle,
equal_to(expected_data),
label='after reshuffle')
pipeline.run()
def test_basic_execution_sideinputs(self):
# TODO(BEAM-3377): Remove after assert_that in streaming is fixed.
global result # pylint: disable=global-variable-undefined
result = []
def recorded_elements(elem):
result.append(elem)
return elem
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
main_stream = (p
| 'main TestStream' >> TestStream()
.advance_watermark_to(10)
.add_elements(['e']))
side_stream = (p
| 'side TestStream' >> TestStream()
.add_elements([window.TimestampedValue(2, 2)])
.add_elements([window.TimestampedValue(1, 1)])
.add_elements([window.TimestampedValue(7, 7)])
.add_elements([window.TimestampedValue(4, 4)])
)
class RecordFn(beam.DoFn):
def process(self,
elm=beam.DoFn.ElementParam,
ts=beam.DoFn.TimestampParam,
side=beam.DoFn.SideInputParam):
yield (elm, ts, side)
records = (main_stream # pylint: disable=unused-variable
| beam.ParDo(RecordFn(), beam.pvalue.AsList(side_stream))
| beam.Map(recorded_elements))
p.run()
# TODO(BEAM-3377): Remove after assert_that in streaming is fixed.
self.assertEqual([('e', Timestamp(10), [2, 1, 7, 4])], result)
def test_basic_execution_batch_sideinputs_fixed_windows(self):
# TODO(BEAM-3377): Remove after assert_that in streaming is fixed.
global result # pylint: disable=global-variable-undefined
result = []
def recorded_elements(elem):
result.append(elem)
return elem
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
main_stream = (p
| 'main TestStream' >> TestStream()
.advance_watermark_to(2)
.add_elements(['a'])
.advance_watermark_to(4)
.add_elements(['b'])
| 'main window' >> beam.WindowInto(window.FixedWindows(1)))
side = (p
| beam.Create([2, 1, 4])
| beam.Map(lambda t: window.TimestampedValue(t, t))
| beam.WindowInto(window.FixedWindows(2)))
class RecordFn(beam.DoFn):
def process(self,
elm=beam.DoFn.ElementParam,
ts=beam.DoFn.TimestampParam,
side=beam.DoFn.SideInputParam):
yield (elm, ts, side)
records = (main_stream # pylint: disable=unused-variable
| beam.ParDo(RecordFn(), beam.pvalue.AsList(side))
| beam.Map(recorded_elements))
p.run()
# TODO(BEAM-3377): Remove after assert_that in streaming is fixed.
self.assertEqual([('a', Timestamp(2), [2]),
('b', Timestamp(4), [4])], result)
def test_read_bzip2_concat(self):
with TempDir() as tempdir:
bzip2_file_name1 = tempdir.create_temp_file()
lines = ['a', 'b', 'c']
with bz2.BZ2File(bzip2_file_name1, 'wb') as dst:
data = '\n'.join(lines) + '\n'
dst.write(data.encode('utf-8'))
bzip2_file_name2 = tempdir.create_temp_file()
lines = ['p', 'q', 'r']
with bz2.BZ2File(bzip2_file_name2, 'wb') as dst:
data = '\n'.join(lines) + '\n'
dst.write(data.encode('utf-8'))
bzip2_file_name3 = tempdir.create_temp_file()
lines = ['x', 'y', 'z']
with bz2.BZ2File(bzip2_file_name3, 'wb') as dst:
data = '\n'.join(lines) + '\n'
dst.write(data.encode('utf-8'))
final_bzip2_file = tempdir.create_temp_file()
with open(bzip2_file_name1, 'rb') as src, open(
final_bzip2_file, 'wb') as dst:
dst.writelines(src.readlines())
with open(bzip2_file_name2, 'rb') as src, open(
final_bzip2_file, 'ab') as dst:
dst.writelines(src.readlines())
with open(bzip2_file_name3, 'rb') as src, open(
final_bzip2_file, 'ab') as dst:
dst.writelines(src.readlines())
pipeline = TestPipeline()
lines = pipeline | 'ReadFromText' >> beam.io.ReadFromText(
final_bzip2_file,
compression_type=beam.io.filesystem.CompressionTypes.BZIP2)
expected = ['a', 'b', 'c', 'p', 'q', 'r', 'x', 'y', 'z']
assert_that(lines, equal_to(expected))
pipeline.run()
def test_basic_execution_sideinputs(self):
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
main_stream = (p
| 'main TestStream' >> TestStream()
.advance_watermark_to(10)
.add_elements(['e']))
side_stream = (p
| 'side TestStream' >> TestStream()
.add_elements([window.TimestampedValue(2, 2)])
.add_elements([window.TimestampedValue(1, 1)])
.add_elements([window.TimestampedValue(7, 7)])
.add_elements([window.TimestampedValue(4, 4)])
)
class RecordFn(beam.DoFn):
def process(self,
elm=beam.DoFn.ElementParam,
ts=beam.DoFn.TimestampParam,
side=beam.DoFn.SideInputParam):
yield (elm, ts, side)
records = (main_stream # pylint: disable=unused-variable
| beam.ParDo(RecordFn(), beam.pvalue.AsList(side_stream)))
# assert per window
expected_window_to_elements = {
window.IntervalWindow(0, 15): [
('e', Timestamp(10), [2, 1, 7, 4]),
],
}
assert_that(
records,
equal_to_per_window(expected_window_to_elements),
custom_windowing=window.FixedWindows(15),
label='assert per window')
assert_that(records, equal_to([('e', Timestamp(10), [2, 1, 7, 4])]))
p.run()
def test_gbk_execution_after_watermark_trigger(self):
test_stream = (TestStream()
.advance_watermark_to(10)
.add_elements([TimestampedValue('a', 11)])
.advance_watermark_to(20)
.add_elements([TimestampedValue('b', 21)])
.advance_watermark_to_infinity())
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
records = (p # pylint: disable=unused-variable
| test_stream
| beam.WindowInto(
FixedWindows(15),
trigger=trigger.AfterWatermark(early=trigger.AfterCount(1)),
accumulation_mode=trigger.AccumulationMode.DISCARDING)
| beam.Map(lambda x: ('k', x))
| beam.GroupByKey())
# TODO(BEAM-2519): timestamp assignment for elements from a GBK should
# respect the TimestampCombiner. The test below should also verify the
# timestamps of the outputted elements once this is implemented.
# assert per window
expected_window_to_elements = {
window.IntervalWindow(0, 15): [
('k', ['a']),
('k', [])
],
window.IntervalWindow(15, 30): [
('k', ['b']),
('k', [])
],
}
assert_that(
records,
equal_to_per_window(expected_window_to_elements),
label='assert per window')
p.run()
def test_deterministic_key(self):
p = TestPipeline()
lines = (p | beam.Create([
'banana,fruit,3', 'kiwi,fruit,2', 'kiwi,fruit,2', 'zucchini,veg,3'
]))
# For pickling
global Player # pylint: disable=global-variable-not-assigned
# [START type_hints_deterministic_key]
class Player(object):
def __init__(self, team, name):
self.team = team
self.name = name
class PlayerCoder(beam.coders.Coder):
def encode(self, player):
return '%s:%s' % (player.team, player.name)
def decode(self, s):
return Player(*s.split(':'))
def is_deterministic(self):
return True
beam.coders.registry.register_coder(Player, PlayerCoder)
def parse_player_and_score(csv):
name, team, score = csv.split(',')
return Player(team, name), int(score)
totals = (lines
| beam.Map(parse_player_and_score)
| beam.CombinePerKey(sum).with_input_types(
beam.typehints.Tuple[Player, int]))
# [END type_hints_deterministic_key]
assert_that(totals | beam.Map(lambda (k, v): (k.name, v)),
equal_to([('banana', 3), ('kiwi', 4), ('zucchini', 3)]))
p.run()
def test_basic_execution_batch_sideinputs_fixed_windows(self):
options = PipelineOptions()
options.view_as(StandardOptions).streaming = True
p = TestPipeline(options=options)
main_stream = (
p
|
'main TestStream' >> TestStream().advance_watermark_to(2).add_elements(
['a']).advance_watermark_to(4).add_elements(
['b']).advance_watermark_to_infinity()
| 'main window' >> beam.WindowInto(window.FixedWindows(1)))
side = (
p
| beam.Create([2, 1, 4])
| beam.Map(lambda t: window.TimestampedValue(t, t))
| beam.WindowInto(window.FixedWindows(2)))
class RecordFn(beam.DoFn):
def process(
self,
elm=beam.DoFn.ElementParam,
ts=beam.DoFn.TimestampParam,
side=beam.DoFn.SideInputParam):
yield (elm, ts, side)
records = (
main_stream # pylint: disable=unused-variable
| beam.ParDo(RecordFn(), beam.pvalue.AsList(side)))
# assert per window
expected_window_to_elements = {
window.IntervalWindow(2, 3): [('a', Timestamp(2), [2])],
window.IntervalWindow(4, 5): [('b', Timestamp(4), [4])]
}
assert_that(
records,
equal_to_per_window(expected_window_to_elements),
label='assert per window')
p.run()