> For the complete documentation index, see [llms.txt](https://mercure-technologies.gitbook.io/xprem/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mercure-technologies.gitbook.io/xprem/local-environment/local-testing.md).

# Local testing

{% stepper %}
{% step %}

### Prebuild

Prebuild your application for IOS and/or Android with:

 `RELEASE_CHANNEL={{WHAT_YOU_WANT}} expo prebuild`
{% endstep %}

{% step %}

### Setup android

```shellscript
cd android
./gradlew clean            # Clean previous builds
./gradlew assembleRelease  # Build the release APK
./gradlew installRelease   # Install the release APK on a connected device or emulator
```

{% endstep %}

{% step %}

### Setup IOS

```shellscript
cd ios
pod cache clean --all
pod install
```

Then:

1. Open the iOS project in Xcode: `open ios/*.xcworkspace`.
2. Go to **Product** → **Scheme** → **Edit Scheme**.
3. Under **Run**, set **Build Configuration** to **Release**.
   {% endstep %}

{% step %}

### Publish an update

Publish an update using 

```shellscript
EOO_TOKEN=X npx eoas publish --branch {{BRANCH}}
```

{% endstep %}
{% endstepper %}

### Example app

The xprem github project has a debugging "example-app" already configured with `expo-updates` and `expo-observe` and can be used to troubleshoot and debug your server. You can find the application in the folder `apps/example-app`

To use it

{% stepper %}
{% step %}

### Create a test application in your dashboard

1. Create an application in the dashboard.
2. Generate its certificates.
3. Move the generated `.txt` certificate to `apps/example-app/certs/certificate-dev.pem`.
   {% endstep %}

{% step %}

#### Update `app.config.ts` <a href="#android-setup" id="android-setup"></a>

In `apps/example-app/app.config.ts`, replace `updates.url` and `updates.requestHeaders.expo-app-id` with your values.
{% endstep %}

{% step %}

#### Update `app.json` <a href="#android-setup" id="android-setup"></a>

If you want to test expo-observe metrics replace expo.extra.eas.observe.endpointUrl with:

```
{{YOUR_BASE_URL}}/observe/{{APP_ID}}
```

{% endstep %}

{% step %}

### Build the example app

Follow [this steps](#prebuild)
{% endstep %}

{% step %}

### Test OTA Updates

```shellscript
EOO_TOKEN=X npx eoas publish --branch {{BRANCH}}
```

{% endstep %}
{% endstepper %}


---

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