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Test your React Native app with Maestro

Alexander Hodes on December 22, 2022

Testing is always something that's important in app development, but often it's still done manually by testers or developers. Sometimes it can occu...

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Davyd NRB • Jan 5 '23

That is untreatable! Definitely, I want to move away from Appium.

Do you know how we can launch app with custom arguments?

// Appium api (see: http://appium.io/docs/en/writing-running-appium/caps/)
capabilities: {
  optionalIntentArguments: `--ez myBool true --es myStr 'string text'`, // Android
  processArguments: {args : ['-myBool', 'true','-myStr', 'string text']}, // iOS
}

Alexander Hodes • Jan 6 '23

Sounds great, I can really recommend Maestro.
You can use the parameters from maestro, e.g.

maestro test -e myBool=true -e myStr =string .maestro/flow.yaml

You can access those external parameters like this in your workflow file:

${USERNAME}

You can find an example workflow file with external parameters here github.com/alexanderhodes/react-na...
And I can recommend the documentation about parameters in the maestro docs maestro.mobile.dev/advanced/parame...

Davyd NRB • Apr 29 '23

No you don't understood. I need support of launchArguments to access them inside my app (not inside e2e flow)

usigin a github.com/iamolegga/react-native-... module

Jake Carpenter • Jan 22 '23

Thank you for the post! I'm playing with this myself now because Appium has way too many problems.

What are the options for infrastructure to run Maestro? Is it currently only their Maestro Cloud? What about physical device support?

Alexander Hodes • Jan 22 '23

You can easily run it on their cloud, because they provide their a dashboard for your historical runs as well.

And you can run it on every infrastructure as well. You just need to install the CLI and the dependencies for the simulator or emulator. It's just a combination of installing the CLI like here.

Furthermore, you can run it on physical devices as well. On Android it works out of the box after connecting your device and for iOS device you need to install the Facebook IDB tool. The installation is described here: maestro.mobile.dev/getting-started...

And here you can find some notes about running it on physical devices. maestro.mobile.dev/getting-started...

Tia Eastwood • Jun 13 '23

Thanks for this, I've just started using maestro and this has some useful examples

Davyd NRB • Apr 29 '23 • Edited

Will be great to add that all MAESTRO_* env variabled will be available in flow without passing them as -e MY_VAR=myVal

export MAESTRO_USERNAME=123

maestro test .maestro/flow.yaml

and then

${MAESTRO_USERNAME} # 123

Davyd NRB • Apr 29 '23

Another cool feature that have to mentioned it is conditions

- runFlow:
    when:
      visible: Password is required
    commands:
      - tapOn: "Enter password"
      - inputText: "my password"

# or 

- runFlow:
    env:
      true: ${IS_IOS == 'true'}
    commands:
      - tapOn: Delete Account