Make interaction tests for UnderlineNav

[pksjce]

Describe your changes here.

Create interaction tests for UnderlineNav.

Screenshots

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Merge checklist

• [x] Added/updated tests
• [ ] Added/updated documentation
• [x] Tested in Chrome
• [ ] Tested in Firefox
• [ ] Tested in Safari
• [ ] Tested in Edge

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[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: db7019a8e3bab17cbda05830f1431f9065876b63

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[github-actions[bot]]

size-limit report 📦

Path	Size
dist/browser.esm.js	74.27 KB (0%)
dist/browser.umd.js	74.82 KB (0%)