tests.system.test_gbq.TestReadGBQIntegration: test_array_length_zero failed

[flaky-bot]

This test failed!

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If I'm commenting on this issue too often, add the flakybot: quiet label and
I will stop commenting.

---

commit: 928e47b
buildURL: Build Status, Sponge
status: failed

Test output

self = 
project_id = 'precise-truck-742'
def test_array_length_zero(self, project_id):
    query = """WITH t as (
               SELECT "a" letter, [""] as array_field
               UNION ALL
               SELECT "b" letter, [] as array_field)

               select letter, array_field, array_length(array_field) len
               from t
               order by letter ASC"""
    df = gbq.read_gbq(
        query,
        project_id=project_id,
        credentials=self.credentials,
        dialect="standard",
    )
    expected = DataFrame(
        [["a", [""], 1], ["b", [], 0]], columns=["letter", "array_field", "len"],
    )


  tm.assert_frame_equal(df, expected)


E       AssertionError: Attributes of DataFrame.iloc[:, 2] (column name="len") are different

E

E       Attribute "dtype" are different

E       [left]:  Int64

E       [right]: int64
tests/system/test_gbq.py:879: AssertionError

[tswast]

prerelease failure, required for support of google-cloud-bigquery 3.x #426

Marking as feature request, as not currently an issue.

[flaky-bot]

Looks like this issue is flaky. 😟

I'm going to leave this open and stop commenting.

A human should fix and close this.

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When run at the same commit (928e47b), this test passed in one build (Build Status, Sponge) and failed in another build (Build Status, Sponge).