🧪 test: improve coverage for yearInReviewUtils

[is0692vs]

🎯 What: The testing gap addressed
The logic for finding the most active hour and handling invalid dates in the GitHub year-in-review calendar utility (src/lib/yearInReviewUtils.ts) lacked sufficient test coverage, leading to untested edge cases.

📊 Coverage: What scenarios are now tested

• getMostActiveHour correctly handles a heatmap with a sparse distribution of events.
• getMostActiveHour breaks ties consistently, including uniform distributions.
• getMostActiveDayFromCalendar properly skips and ignores inputs with invalid date strings without failing or distorting the counts.

✨ Result: The improvement in test coverage
Test coverage for yearInReviewUtils.ts has increased from 6% to 100% statement and branch coverage. The added tests ensure the safety of this component moving forward.

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PR created automatically by Jules for task 6820831989193250671 started by @is0692vs

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Project	Deployment	Actions	Updated (UTC)
github-user-summary	Ready	Preview, Comment	Mar 21, 2026 4:46am

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 940d7732-94f7-42a4-b896-f64bf080992e

📥 Commits

Reviewing files that changed from the base of the PR and between 87d145d and 5038f17.

📒 Files selected for processing (4)

• patch.diff
• patch2.diff
• src/lib/__tests__/yearInReviewUtils.test.ts
• src/lib/__tests__/yearInReviewUtils.test.ts.orig

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch test/year-in-review-utils-6820831989193250671

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[gemini-code-assist]

Summary of Changes

Hello, 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 significantly enhances the robustness of the yearInReviewUtils.ts utility by addressing critical testing gaps. The changes ensure that key functions, such as getMostActiveHour and getMostActiveDayFromCalendar, are thoroughly tested against various edge cases, including sparse data distributions, tie scenarios, and invalid date inputs. This improvement guarantees the utility's reliability and accuracy in processing GitHub year-in-review data.

Highlights

• Test Coverage Improvement: Increased test coverage for src/lib/yearInReviewUtils.ts from 6% to 100% statement and branch coverage, ensuring the safety and reliability of the utility functions.
• Most Active Hour Logic: Added comprehensive test cases for getMostActiveHour to verify its behavior with sparsely distributed commits and consistent tie-breaking when all hours have the same number of commits.
• Invalid Date Handling: Introduced a new test case for getMostActiveDayFromCalendar to confirm that the function correctly ignores inputs containing invalid date strings without affecting the calculation of the most active day.

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[gemini-code-assist]

Code Review

This pull request significantly improves the test coverage for yearInReviewUtils.ts by adding tests for several important edge cases. The new tests cover scenarios such as uniform distributions and sparse data for getMostActiveHour, and invalid date handling for getMostActiveDayFromCalendar. The changes are well-implemented and effectively address the testing gap. I have reviewed the changes and have no further feedback.

[is0692vs]

レビュー内容を整理します。

全体所感

• gemini-code-assist: This pull request significantly improves the test coverage for yearInReviewUtils.ts by adding tests for several important edge cases. The new tests cover scenarios such as uniform distributions and sparse data for getMostActiveHour, and invalid date handling for getMostActiveD...

• 現時点で未解決のインライン指摘は見当たりませんでした。

[google-labs-jules]

レビュー内容を整理します。

全体所感

• gemini-code-assist: This pull request significantly improves the test coverage for yearInReviewUtils.ts by adding tests for several important edge cases. The new tests cover scenarios such as uniform distributions and sparse data for getMostActiveHour, and invalid date handling for getMostActiveD...

• 現時点で未解決のインライン指摘は見当たりませんでした。

確認しました。テストカバレッジの向上が確認され、追加の対応は不要とのこと了解しました。

[is0692vs]

@coderabbitai review

[coderabbitai]

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