Maestro

Maestro UI Testing

Setup

# Install (if needed)
curl -fsSL "https://get.maestro.mobile.dev" | bash

# Verify
maestro --version

Running Tests

# Target iOS simulator (get UDID from `xcrun simctl list devices available`)
maestro --device <SIMULATOR_UDID> test example/maestro/flow.yaml

# Target Android (default if connected)
maestro test example/maestro/flow.yaml

# Run all flows
maestro --device <UDID> test example/maestro/

# Generate HTML report
maestro --device <UDID> test --format html --output results.html example/maestro/

Building & Launching the Example App

Before running Maestro, the example app must be built and installed:

# Install deps & pods
cd /path/to/react-native-jsi-udp && yarn install
cd example/ios && pod install

# Build Release for simulator
xcodebuild -workspace JsiUdpExample.xcworkspace -scheme JsiUdpExample \
  -configuration Release -sdk iphonesimulator \
  -destination 'platform=iOS Simulator,name=<DEVICE_NAME>' build

# Install & launch
xcrun simctl install <UDID> "<BUILT_PRODUCTS_DIR>/JsiUdpExample.app"
xcrun simctl launch <UDID> org.reactjs.native.example.JsiUdpExample

For Debug builds, also start Metro: cd example && yarn start

Writing Flows

See references/maestro.md for the full Maestro command reference.

App ID: org.reactjs.native.example.JsiUdpExample

Example App Structure

The example app is a test runner with suites: lifecycle, send-receive, address, options, multicast, broadcast, errors, stress, suspend-resume, and latency-server.

Key UI elements:

• "Run All Suites" button — runs all test suites (except latency-server)
• "Run Suite" button — per-suite, multiple on screen (use index: to target)
• "Reset" button — resets all results
• Suite status text: "N passed · N failed · N skipped · N manual" (single text node, use regex if matching substrings)
• Test names are visible text elements
• Status badges: "PASSED", "FAILED", "SKIPPED", "MANUAL", "RUNNING"

Flow Tips

• Use launchApp: { clearState: true } for clean runs
• Tests run fast — use extendedWaitUntil for "Run Suite" button reappearing as completion signal
• Compound text nodes (e.g., "4 passed · 0 failed") can't be matched by substring; use scrollUntilVisible + assertVisible on individual elements instead
• Always specify --device <UDID> on machines with both iOS simulator and Android connected
• Use scrollUntilVisible to find tests that are below the fold

Minimal Flow Template

appId: org.reactjs.native.example.JsiUdpExample
name: Run and verify tests
---
- launchApp:
    clearState: true
- extendedWaitUntil:
    visible: "Run All Suites"
    timeout: 10000
- tapOn: "Run All Suites"
- extendedWaitUntil:
    visible: "Run All Suites"
    timeout: 120000
- takeScreenshot: "results"