Fix _OrderedUnionCoder is_deterministic check.

[claudevdm]

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[gemini-code-assist]

Summary of Changes

Hello @claudevdm, 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 addresses a subtle bug in the _OrderedUnionCoder's is_deterministic method where it was incorrectly evaluating a property instead of calling a method. The fix ensures that the determinism check for union coders functions as intended, and new test cases have been introduced to validate this corrected behavior.

Highlights

• Bug Fix: _OrderedUnionCoder.is_deterministic: Corrected the is_deterministic method within _OrderedUnionCoder to properly invoke c.is_deterministic() as a method call instead of accessing it as a property c.is_deterministic. This ensures the correct evaluation of coder determinism.
• New Test Cases: Added test_OrderedUnionCoderDeterministic to coders_test_common.py to thoroughly verify the is_deterministic logic of _OrderedUnionCoder under various conditions, including cases with deterministic and non-deterministic sub-coders.

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Changelog

• sdks/python/apache_beam/coders/coders.py
  • Fixed the call to is_deterministic from a property access to a method invocation within the _OrderedUnionCoder class.
• sdks/python/apache_beam/coders/coders_test_common.py
  • Added test_OrderedUnionCoderDeterministic to verify the correct functionality of _OrderedUnionCoder.is_deterministic.

Activity

• The pull request includes standard Apache Beam contribution guidelines and CI status links. No specific human activity (comments, reviews, or progress updates) has been recorded yet.

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[github-actions]

Assigning reviewers:

R: @damccorm for label python.

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[github-actions]

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[damccorm]

Nice catch, thanks!