Test : aggregation edge cases for list and scalar values

[Achieve3318]

This PR adds focused unit tests for aggregate_by_field in OceanBase memory utilities to improve behavior coverage for real-world input shapes.

• Adds test coverage for list-valued aggregation fields, including whitespace trimming and skipping invalid list entries.
• Adds test coverage for scalar field values to ensure blank/non-string values are ignored.
• Confirms aggregation output remains correct and stable for mixed-quality message payloads.

Why this helps

It strengthens regression protection for aggregation logic used by memory retrieval flows, with no production code changes and minimal review risk.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: a3e4cd42-018c-4b0b-afa6-90543d64ad8b

📥 Commits

Reviewing files that changed from the base of the PR and between b7b8021 and e64e6a7.

📒 Files selected for processing (1)

• test/unit_test/memory/utils/test_ob_conn_aggregation.py

📝 Walkthrough

Walkthrough

Added two new unit tests for the aggregate_by_field function to verify handling of list values with element aggregation and trimming, plus scalar value filtering of non-string and blank elements. No production code changes.

Changes

Cohort / File(s)	Summary
Test Coverage Expansion test/unit_test/memory/utils/test_ob_conn_aggregation.py	Added two new test methods to TestAggregateByField: one validates aggregation of list elements with whitespace trimming and blank-string filtering while handling non-string values gracefully; another validates scalar value handling by filtering non-strings and blank/whitespace-only strings.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Poem

🐰 With whiskers twitched and tests so true,
Two new cases see us through,
Lists and scalars, trimmed with care,
Blanks ignored, the strings laid bare! 🌟

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding tests for aggregation edge cases covering list and scalar values.
Description check	✅ Passed	The description covers the PR purpose, test coverage scope, and benefits, though it lacks the structured template sections (problem statement, change type).

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[Achieve3318]

Hi, @yingfeng , Could you review my PR, please?

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@test/unit_test/memory/utils/test_ob_conn_aggregation.py`:
- Around line 57-74: The two new tests
test_aggregates_list_values_and_trims_whitespace and
test_ignores_non_string_and_blank_scalar_values are missing the required pytest
priority markers; add the appropriate pytest marker (e.g., `@pytest.mark.p1` or
`@pytest.mark.p2/`@pytest.mark.p3 per project guidelines) above each test function
so they include a priority marker, and ensure you import pytest if not already
present so the decorators resolve.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 16f5e3ca-fd10-4cdf-b683-109f1fb55000

📥 Commits

Reviewing files that changed from the base of the PR and between f906a20 and b7b8021.

📒 Files selected for processing (1)

• test/unit_test/memory/utils/test_ob_conn_aggregation.py

[Achieve3318]

Hi, @yingfeng , Could you review my PR, please?

[Achieve3318]

hi, @yingfeng , Could you review my PR?

[Achieve3318]

Hi, @yingfeng , Could you review my PR, please?