test: add Playwright coverage and test ids for radio group

[fateeand]

Summary

• Added 4 tests covering the three-component family (CpsRadioGroupComponent, CpsRadioComponent, CpsRadioButtonComponent).
  • Real native radio-group keyboard navigation: ArrowDown from an enabled radio natively skips a disabled sibling and moves real focus + real checked state to the next enabled one.
  • Real form validation: selecting the wrong option and blurring shows the real error text with real aria-describedby wiring; selecting the right option clears it.
  • Real inert blocks focus: a nested, real cps-select inside an unselected <cps-radio>'s projected content genuinely refuses .focus() calls until its radio is selected.
  • Real hideDetails suppresses both a hint and a validation error: one example's lifecycle proves both - a set hint stays absent while untouched, and once driven genuinely invalid (aria-invalid="true") the error stays absent too.
• Added two new demo examples ("Radio group with a hint", "Required radio group with hidden details").
• Added testids to the components' templates.

TODO: Merge with feat: add test ids to radio group

---

Release notes:

• added Playwright E2E coverage for radio group
• added test ids to radio group

[github-actions]

Coverage report for library

St.❔	Category	Percentage	Covered / Total
🟡	Statements	77.85%	6267/8050
🟡	Branches	66.98%	2889/4313
🟡	Functions	79.61%	1183/1486
🟡	Lines	78.83%	5859/7432

Test suite run success

2474 tests passing in 76 suites.

Report generated by 🧪jest coverage report action from 96c89ba

[Copilot]

🟡 Changes recommended

There are correctness/maintainability issues in newly added test id wiring and a broken TS documentation snippet that should be fixed before approval.

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Pull request overview

This PR expands the radio-group component family’s E2E coverage and improves testability by introducing data-testid hooks across the radio group/radio/radio-button templates, plus adding new composition demo examples to exercise hint/hideDetails and validation behaviors.

Changes:

• Added Playwright E2E tests for native radio keyboarding, validation/error wiring, inert focus blocking, and hideDetails behavior.
• Added data-testid attributes throughout the radio-group templates (and host for cps-radio).
• Added two new composition examples and updated the radio page form setup to support them.

File summaries

File	Description
projects/cps-ui-kit/src/lib/components/cps-radio-group/cps-radio/cps-radio.component.ts	Adds a host-level data-testid to cps-radio.
projects/cps-ui-kit/src/lib/components/cps-radio-group/cps-radio-group.component.html	Adds multiple data-testid hooks to the radio-group structure and generated options.
projects/cps-ui-kit/src/lib/components/cps-radio-group/cps-radio-button/cps-radio-button.component.html	Adds data-testid hooks to radio-button wrapper/input/content/label.
projects/composition/src/app/pages/radio-page/radio-page.examples.ts	Adds new examples (“hint”, “required hidden details”) and associated code strings.
projects/composition/src/app/pages/radio-page/radio-page.component.ts	Refactors to inject() and adds a second required control for the new example.
projects/composition/src/app/pages/radio-page/radio-page.component.html	Renders the two new radio-group examples on the composition page.
playwright/cps-ui-kit/components/cps-radio-group.spec.ts	Introduces new Playwright coverage for radio-group behaviors.

Review details

• Files reviewed: 7/7 changed files
• Comments generated: 3
• Review effort level: Lite

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[github-actions]

Playwright test results

 516 passed

Details

 516 tests across 20 suites
 16 minutes, 40 seconds
 96c89ba
 For details, download the Playwright report