test(core): add createKeyEvent unit tests

[Harshithk951]

Description

This PR adds comprehensive unit tests for createKeyEvent helper function in packages/core/src/events/types.ts to verify its functional correctness and prevent regressions.

Related Issue

Closes #1920

Which package(s)?

@termuijs/core

Type of Change

• 🐛 Bug fix (type:bug)
• ✨ Feature (type:feature)
• 📝 Docs (type:docs)
• 🧪 Tests (type:testing)
• ♻️ Refactor (type:refactor)
• 🎨 Design / UX (type:design)
• ♿ Accessibility (type:accessibility)
• ⚡ Performance (type:performance)
• 🔧 DevOps / CI (type:devops)
• 🔒 Security (type:security)

Checklist

• ⭐ You starred the repo. The needs-star check blocks your merge otherwise.
• Tests pass locally: bun vitest run
• Build passes: bun run build
• Typecheck passes: bun run typecheck
• You read CONTRIBUTING.md.
• Your PR title follows type: short description.
• Widget state mutators call markDirty() (if your change affects rendering).
• No new any types without an inline comment explaining why.
• No unrelated refactors bundled into this PR.

GSSoC 2026 Participation

• You are a GSSoC 2026 contributor.
• Your GSSoC profile: https://gssoc.girlscript.org/profile/Harshithk951

Screenshots / Recordings (UI changes)

N/A

Notes for the Reviewer

None

Summary by CodeRabbit

• Tests
  • Added coverage for keyboard event creation behavior.
  • Verified that key events include the expected base properties and modifier flags.
  • Confirmed that stopping propagation and preventing default correctly update the event’s internal state.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 9e73662e-c95e-4013-9e42-46817e1a20ed

📥 Commits

Reviewing files that changed from the base of the PR and between 85e8d36 and 83049a1.

📒 Files selected for processing (1)

• packages/core/src/events/types.test.ts

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📝 Walkthrough

Walkthrough

Adds a new Vitest test suite for createKeyEvent in packages/core/src/events/types.test.ts, verifying construction of base key event properties and that stopPropagation() and preventDefault() correctly flip internal flags from false to true.

Changes

createKeyEvent test coverage

Layer / File(s)	Summary
createKeyEvent unit tests packages/core/src/events/types.test.ts	New test suite verifies key event field construction (key, raw, modifier flags, targetId) and that stopPropagation()/preventDefault() set _propagationStopped/_defaultPrevented to true.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• Karanjot786/TermUI#1073: Both PRs add Vitest tests using createKeyEvent to verify key-handling behavior.
• Karanjot786/TermUI#1162: Both PRs center on createKeyEvent, with the retrieved PR constructing KeyEvent objects via this helper instead of unsafe casts.
• Karanjot786/TermUI#1598: Both PRs add coverage involving createKeyEvent-based key event construction in tests.

Suggested labels: gssoc:approved, quality:clean, level:beginner

Suggested reviewers: Karanjot786

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title is concise, specific, and accurately describes the main change as adding createKeyEvent tests.
Description check	✅ Passed	The PR description matches the template and includes the required sections, linked issue, package, change type, and checklist.
Linked Issues check	✅ Passed	The added tests cover the object shape and both propagation/default-prevention flags required by issue #1920.
Out of Scope Changes check	✅ Passed	The change is limited to a new unit test file and does not introduce unrelated code.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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