# Argent Test UI Flow

> Autonomously test an app UI (iOS or Android) by running interact-screenshot-verify loops using argent MCP tools. Use when testing a UI flow, verifying login works, testing navigation, or running an end-to-end UI test scenario.

- Skill: `uniswap/argent-test-ui-flow` (Agent Skill)
- Install (CLI): `npx skillmds@latest add uniswap/argent-test-ui-flow`
- Raw SKILL.md: https://api.skillmd.com/api/skills/uniswap/argent-test-ui-flow/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: uniswap (https://skillmd.com/u/uniswap)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/uniswap/argent-test-ui-flow

---


## Platform-agnostic

The interaction tool names are identical on iOS and Android — `gesture-tap`, `gesture-swipe`, `describe`, `screenshot`, `launch-app`, etc. — and the tool-server auto-dispatches based on the `udid` you pass (UUID-shape → iOS, adb serial → Android).

Get a `udid` via:

| Platform | Setup skill                     | Find devices with                                           |
| -------- | ------------------------------- | ----------------------------------------------------------- |
| iOS      | `argent-ios-simulator-setup`    | `list-devices` → `boot-device` with `udid` if none booted   |
| Android  | `argent-android-emulator-setup` | `list-devices` → `boot-device` with `avdName` if none ready |

## 1. Workflow

All interactions go through argent MCP tools. Ensure the simulator/emulator is ready before starting.

1. **Baseline screenshot**: Call `screenshot` to see the current UI state.
2. **Find target**: Before tapping, use a discovery tool to get element coordinates:
   - **React Native apps**: use `debugger-component-tree` — it returns component names with (tap: x,y) coordinates. This is the preferred tool for RN apps on either platform. To use it, resolve the `argent-react-native-app-workflow` skill for setup; on Android you must also run `adb -s <serial> reverse tcp:8081 tcp:8081` so Metro is reachable from the device.
   - **Standard app screens and in-app modals**: use `describe`. On iOS this returns the AX tree (falls back to native-devtools when AX is empty); on Android it returns the uiautomator tree in the same DescribeNode shape.
   - **Permission prompts / system modal overlays**: try `describe` first. Fall back to `screenshot` only if the overlay is not exposed reliably.
   - **Fallback**: use `screenshot` to estimate where the desired component is, then verify immediately after the action.
3. **Interact**: Perform the action (`gesture-tap`, `gesture-swipe`, `keyboard`, `button`, ...) — you receive a screenshot automatically.
4. **Verify**: Check the returned screenshot for expected results. If it shows a loading/transitional state, retake with `screenshot`.
5. **Repeat** for each step in the flow.

## 2. Template

```
Goal: Test [feature name]

Steps:
1. screenshot → see current state (baseline)
2. [Navigate / tap / type to reach starting point] → verify auto-screenshot
3. [Perform the action to test] → verify auto-screenshot
4. Report: pass / fail with details
```

## 3. Examples

### Login flow

```
1. screenshot → see login screen
2. gesture-tap { x: 0.5, y: 0.4 }  → tap email field
3. paste { text: "user@example.com" }
4. gesture-tap { x: 0.5, y: 0.55 } → tap password field
5. paste { text: "password123" }
6. gesture-tap { x: 0.5, y: 0.7 }  → tap Login button
7. screenshot → verify home screen appeared
```

### Scroll and navigation

```
1. screenshot → see list at top
2. gesture-swipe { fromY: 0.7, toY: 0.3 } → scroll down
3. gesture-tap item at visible position → verify auto-screenshot
4. screenshot → verify detail view opened
5. button { button: "back" }
6. screenshot → verify returned to list
```

---

## 4. Recovery Pattern

- If screenshot shows loading/transition: wait 500ms, retake with `screenshot`.
- If tap misses target: re-run discovery tool (`describe` / `debugger-component-tree`), retry once with new coordinates.
- If a permission dialog or modal is visible: re-run `describe` first. Stay in screenshot-driven navigation only when the overlay is not exposed reliably, then switch back to `describe` / `debugger-component-tree` as soon as it is dismissed.
- If tap fails twice at same coordinates: stop, re-discover, report if element not found.
- If a **saved flow** fails during `flow-execute` replay (as opposed to live test steps above): follow `argent-create-flow` skill §10 for structured diagnosis and correction.

## Tips

- **Use `paste` for text entry on iOS** — faster and more reliable than key-by-key `keyboard`. `paste` is iOS-only; on Android use `keyboard` instead.
- **Use `gesture-custom` for long-press** context menus (800ms hold).
- **Report clearly**: state what you expected, what you saw, and the verdict.
- **Coordinate estimation**: center = 0.5, 0.5; top-third ~ 0.2; bottom-third ~ 0.8.
- **Permission modals**: try `describe` first. Use `screenshot` only as fallback, tap one visible button at a time, and verify with the returned screenshot before continuing.
- **Record for replay**: If a tested flow is likely to be repeated, use the `argent-create-flow` skill to record it as a `.yaml` script. This lets you replay the entire sequence later with a single `flow-execute` call instead of re-running each step manually.

## Related Skills

| Skill                              | When to use                                             |
| ---------------------------------- | ------------------------------------------------------- |
| `argent-device-interact`           | Tool usage for tapping, swiping, typing (iOS + Android) |
| `argent-ios-simulator-setup`       | Booting and connecting an iOS simulator                 |
| `argent-android-emulator-setup`    | Booting and connecting an Android emulator              |
| `argent-react-native-app-workflow` | Starting the app, Metro, build issues                   |
| `argent-metro-debugger`            | Breakpoints, console logs, JS evaluation                |
| `argent-create-flow`               | Record a test sequence as a replayable flow             |