[testbot] Add tests for format-date.test.ts

[svc-osmo-ci]

Summary

AI-generated tests targeting file(s) with low coverage.

Issue - None

Files tested

• src/ui/src/lib/format-date.test.ts

Checklist

• I am familiar with the Contributing Guidelines
• New or existing tests cover these changes
• The documentation is up to date with these changes

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Generated by testbot pipeline

Summary by CodeRabbit

• Tests
  • Added comprehensive test coverage for date and time formatting utilities, including validation of multiple formatting variants, edge case handling, duration calculations, and relative date formatting.

[coderabbitai]

📝 Walkthrough

Walkthrough

A new comprehensive Vitest test suite was added for date/time formatting utilities, covering null-input handling, formatted output validation, duration calculations, day comparisons, and relative date formatting across multiple function variants.

Changes

Cohort / File(s)	Summary
Date Formatting Tests src/ui/src/lib/format-date.test.ts	New test suite with 548 lines covering date/time formatters: null-input validation, multiple formatting variants (full/UTC/succinct), duration formatting with remainder rules, day equality checks, and relative date formatting with context-aware outputs (today → time-only, same-year → month/day + time, cross-year → full date).

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Poem

🐰 A warren of dates, all tested with care,
From null to duration, we've covered them fair!
Each formatter's checked from UTC to the day,
Relative times dance in just the right way.
Whiskers of code, now fortified bright! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding comprehensive tests for the format-date utilities in a new test file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch testbot/20260409-2131

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.23%. Comparing base (f6535b9) to head (17cffe3).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #842      +/-   ##
==========================================
+ Coverage   42.82%   43.23%   +0.40%     
==========================================
  Files         203      203              
  Lines       27123    27123              
  Branches     7759     7759              
==========================================
+ Hits        11616    11727     +111     
+ Misses      15398    15284     -114     
- Partials      109      112       +3     

Flag	Coverage Δ
backend	44.71% <ø> (-0.19%)	⬇️
ui	27.77% <ø> (+6.68%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.
see 18 files with indirect coverage changes

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[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 `@src/ui/src/lib/format-date.test.ts`:
- Around line 88-90: The test expects formatDateTimeFullUTC to return an empty
string for invalid input, but the current implementation accesses UTC fields
without validating the Date; update the formatDateTimeFullUTC function to parse
the input into a Date (if needed) and immediately guard by checking date
validity (e.g., date.getTime() is NaN) and return "" for invalid dates before
any UTC property access; modify the implementation in the formatDateTimeFullUTC
function in format-date.ts so the test case with "not-a-date" passes.

🪄 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: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 8869a4b7-5f6d-4c8a-8228-a2888dad6792

📥 Commits

Reviewing files that changed from the base of the PR and between f6535b9 and 17cffe3.

📒 Files selected for processing (1)

• src/ui/src/lib/format-date.test.ts