test(oxygen-ui): add unit tests for AppBreadcrumbs component

[epunmanula]

Purpose

Added comprehensive unit tests for the AppBreadcrumbs component using @testing-library/react and vitest.

Test Coverage

• Default rendering: Verifies standard breadcrumb items render properly without errors.
• Custom props: Tests maxItems truncation behavior (ellipsis display) and custom sx prop styling.
• Click & Keyboard events: Ensures onClick callbacks trigger properly on mouse clicks and keyboard (Enter, Space) interactions.
• Accessibility: Validates ARIA attributes (aria-label="breadcrumb", role="button", tabIndex="0").

Related Issues

• N/A

Related PRs

• N/A

Checklist

• Followed the CONTRIBUTING guidelines.
• Manual test round performed and verified.
• Documentation provided. (Add links if there are any)
• Unit tests provided. (Add links if there are any)
• Storybook stories updated/added (if applicable)

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines?
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets?

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 7e0152ca-7158-436b-8446-6839d9b1f3a3

📥 Commits

Reviewing files that changed from the base of the PR and between d355e5b and dfc021f.

📒 Files selected for processing (3)

• README.md
• packages/oxygen-ui/src/components/AppBreadcrumbs/AppBreadcrumbs.test.tsx
• packages/oxygen-ui/src/components/AppBreadcrumbs/AppBreadcrumbs.tsx

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📝 Walkthrough

Summary

• Added comprehensive unit tests for AppBreadcrumbs.
• Covered rendering, truncation, hidden-item menus, custom sx styling, mouse clicks, keyboard activation, and accessibility attributes.
• Removed an unused callback parameter.
• Corrected grammar and wording in README.md.

Walkthrough

The README build instruction and license statement were corrected. The AppBreadcrumbs component removed an unused callback parameter. New tests cover rendering, mouse and keyboard activation, truncation, hidden-item interaction, accessibility attributes, and custom sx styling.

Suggested reviewers: jeradrutnam, brionmario

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: adding unit tests for the AppBreadcrumbs component.
Description check	✅ Passed	The description includes the required sections and clearly documents the test coverage, checklist, and security checks.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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Warning

⚠️ This pull request shows signs of AI-generated slop (redundant_comments, trivial_assertion). It has been flagged by CodeRabbit slop detection and should be reviewed carefully.

[CLAassistant]

All committers have signed the CLA.