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test(bigquery): simplify scripting system test to reduce flakiness #9458

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Oct 14, 2019
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31 changes: 7 additions & 24 deletions bigquery/tests/system.py
Original file line number Diff line number Diff line change
Expand Up @@ -432,7 +432,7 @@ def test_list_tables(self):
self.assertGreater(len(list(iterator)), 0)

def test_listing_scripting_jobs(self):
# run an SQL script
# Run a SQL script.
sql_script = """
-- Declare a variable to hold names as an array.
DECLARE top_names ARRAY<STRING>;
Expand All @@ -453,31 +453,14 @@ def test_listing_scripting_jobs(self):
FROM `bigquery-public-data.samples.shakespeare`
);
"""
test_start = datetime.datetime.utcnow()
query_job = Config.CLIENT.query(sql_script, project=Config.CLIENT.project)
query_job.result()

# fetch jobs created by the SQL script, sort them into parent and
# child jobs
script_jobs = list(Config.CLIENT.list_jobs(min_creation_time=test_start))

parent_jobs = []
child_jobs = []
parent_job = Config.CLIENT.query(sql_script, project=Config.CLIENT.project)
parent_job.result()

for job in script_jobs:
if job.num_child_jobs > 0:
parent_jobs.append(job)
else:
child_jobs.append(job)

assert len(parent_jobs) == 1 # also implying num_child_jobs > 0
assert len(child_jobs) == parent_jobs[0].num_child_jobs
# Fetch jobs created by the SQL script.
child_jobs = list(Config.CLIENT.list_jobs(parent_job=parent_job))

# fetch jobs using the parent job filter, verify that results are as expected
fetched_jobs = list(Config.CLIENT.list_jobs(parent_job=parent_jobs[0]))
assert sorted(job.job_id for job in fetched_jobs) == sorted(
job.job_id for job in child_jobs
)
assert parent_job.num_child_jobs > 0
assert len(child_jobs) == parent_job.num_child_jobs

def test_update_table(self):
dataset = self.temp_dataset(_make_dataset_id("update_table"))
Expand Down