test_multiple_identical_destinations_on_write_truncate was flaky

[stankiewicz]

bigquery_file_loads_test.py::TestBigQueryFileLoads::test_multiple_identical_destinations_on_write_truncate was flaky due to reshuffle inside BQ IO and assumption that input row will get always same job id from mock. Once order changed, asserts fail.

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[gemini-code-assist]

Summary of Changes

Hello @stankiewicz, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request aims to stabilize the test_multiple_identical_destinations_on_write_truncate test in the BigQuery file loads module. The test was intermittently failing due to an assumption about job ID assignment within its mock implementation, which was susceptible to changes in processing order. By making the mock's job ID generation deterministic, the change ensures reliable test execution and prevents future flakiness.

Highlights

• Flaky Test Fix: The pull request resolves a flakiness issue in the test_multiple_identical_destinations_on_write_truncate test by addressing non-deterministic behavior in its mock setup.
• Mock Job ID Consistency: The mock jobId generation within the test has been modified to consistently return job_name1, removing the previous variation (job_name2, job_name3) that led to flakiness.
• Assertion Alignment: Corresponding assertions for TableReference objects have been updated to expect job_name1, aligning with the new deterministic mock behavior.

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[stankiewicz]

R: @portikCoder

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control. If you'd like to restart, comment assign set of reviewers

[portikCoder]

Minor but now my comments became a hunter for inattentive devs 😅