# Testing Web Interfaces

> Tests web interfaces across component and browser layers.

- Skill: `socketdev/testing-web-interfaces` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add socketdev/testing-web-interfaces`
- Raw SKILL.md: https://api.skillmd.com/api/skills/socketdev/testing-web-interfaces/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Web & Frontend
- Author: socketdev (https://skillmd.com/u/socketdev)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/socketdev/testing-web-interfaces

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# Testing Web Interfaces

Choose the lowest layer that proves the user-visible behavior, then add a browser test
when interaction, layout, navigation, or rendering integration is the risk.

## Workflow

1. Read [test-layering.md](references/test-layering.md) and state the behavior and
   failure mode before choosing a tool.
2. Write focused Vitest coverage for deterministic component/state behavior.
3. Use the repository’s browser-test setup for real navigation, keyboard behavior,
   responsive state, and browser APIs. Do not create a competing runner.
4. For a locally served page, start the repository's existing development command through the
   package.json script that launches it through `portless`. Test the generated HTTPS `.localhost`
   URL; do not hard-code a port or create another server path.
5. Capture rendered output through
   [rendering-chromium-to-png](../rendering-chromium-to-png/SKILL.md) when visual
   correctness is material.
6. Run the canonical repository test and coverage commands before handoff.

## Boundaries

- Test user-observable outcomes rather than implementation details.
- Keep browser tests independent and avoid fixed sleeps; wait for meaningful UI state.
- Route design review findings to
  [reviewing-web-interfaces](../reviewing-web-interfaces/SKILL.md).

## Design Cluster

Use [designing-interfaces](../designing-interfaces/SKILL.md) for the intended visual
direction, [improving-web-interfaces](../improving-web-interfaces/SKILL.md) for component
changes, [reviewing-web-interfaces](../reviewing-web-interfaces/SKILL.md) for rendered
evidence, [extracting-design-systems](../extracting-design-systems/SKILL.md) for shared
patterns, and [optimizing-react-interfaces](../optimizing-react-interfaces/SKILL.md) when the
regression is performance-sensitive.

## References

- [Test-layer selection and source map](references/test-layering.md)