# Device Testing

> Plan and run mobile tests across representative devices, OS versions, lifecycle transitions, networks, permissions, upgrades, and hardware constraints.

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

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# Device Testing

Build a risk-based matrix rather than attempting every device combination.

## Matrix

Include the minimum/maximum supported OS, common current OS, small and large screens, constrained memory/CPU, relevant hardware, locale/RTL, accessibility settings, and clean install versus upgrade.

## Scenarios

- Startup, background/foreground, process death, state restoration, rotation/resizing, and interruption.
- Offline, slow, lossy, captive, and changing networks; timeout, retry, and duplicate-action behavior.
- Permission granted, denied, restricted, revoked, and changed in settings.
- Authentication expiry, deep links, notifications, file/media access, camera/location, and purchases where applicable.
- Battery, storage, thermal, memory, crash, and responsiveness signals.

Record device/OS/build, setup, exact steps, expected/actual behavior, logs, screenshots when useful, and reproducibility. Distinguish simulator/emulator evidence from physical-device verification.