[thebadalov]

Issue number: closes #8700

Summary

Changes

IdempotencyHandler._handle_for_status now checks response_dict is not None before deserializing the stored response, the same check _get_function_response already uses when saving it.

Added test_idempotent_function_falsy_response_replay, parametrized over 0, False, "", [] and {}. Each case calls the function twice with the same payload and checks that the second call returns the same value and type without running the function again. All five cases fail on the current develop and pass with the fix.

User experience

• Before: a function returning 0, False, "", [] or {} got None back on every replay.
• After: the replay returns the stored value. Functions that return None and truthy values behave the same as before.

Testing

• tests/functional/idempotency and tests/unit/idempotency: 207 passed
• ruff format, ruff lint, mypy and ty: clean
• Checked against a local Redis server with CachePersistenceLayer for 0, False, "", [], {}, None and a truthy value

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[leandrodamascena]

Thanks @thebadalov, confirmed against real DynamoDB and Valkey: on develop every falsy return (0, False, "", [], {}) comes back as None on replay, with your change each one comes back as the stored value with the right type, and None and truthy values are unchanged. The dataclass serializer path is fine too.

I'm approving now. This goes out in 3.40.0, so it will sit here for a while before I merge it. No rebase needed in the meantime, and you'll be credited in the release notes.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.01%. Comparing base (083460d) to head (4eef493).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #8701   +/-   ##
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  Coverage    97.01%   97.01%           
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  Files          321      321           
  Lines        16431    16431           
  Branches      1484     1484           
========================================
  Hits         15940    15940           
  Misses         350      350           
  Partials       141      141           

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