141 lines
4.8 KiB
Markdown
141 lines
4.8 KiB
Markdown
---
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title: Detox Plugin for Nx
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description: Learn how to set up and use Detox for end-to-end testing of mobile applications in your Nx workspace, including environment setup and configuration options.
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---
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Detox is gray box end-to-end testing and automation library for mobile apps. It has a lot of great features:
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- Cross Platform
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- Runs on Devices
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- Automatically Synchronized
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- Test Runner Independent
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- Debuggable
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## Setting Up Detox
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### Setup Environment
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#### Install applesimutils (Mac only)
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[applesimutils](https://github.com/wix/AppleSimulatorUtils) is a collection of utils for Apple simulators.
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```sh
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brew tap wix/brew
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brew install applesimutils
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```
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#### Install Jest Globally
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```sh
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npm install -g jest
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```
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### Installation
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{% callout type="note" title="Keep Nx Package Versions In Sync" %}
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Make sure to install the `@nx/detox` version that matches the version of `nx` in your repository. If the version numbers get out of sync, you can encounter some difficult to debug errors. You can [fix Nx version mismatches with this recipe](/recipes/tips-n-tricks/keep-nx-versions-in-sync).
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{% /callout %}
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In any Nx workspace, you can install `@nx/detox` by running the following command:
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{% tabs %}
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{% tab label="Nx 18+" %}
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```shell {% skipRescope=true %}
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nx add @nx/detox
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```
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This will install the correct version of `@nx/detox`.
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### How @nx/detox Infers Tasks
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The `@nx/detox` plugin will create a task for any project that has an ESLint configuration file present. Any of the following files will be recognized as an ESLint configuration file:
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- `.detoxrc.js`
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- `.detoxrc.json`
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- `detox.config.js`
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- `detox.config.json`
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### View Inferred Tasks
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To view inferred tasks for a project, open the [project details view](/concepts/inferred-tasks) in Nx Console or run `nx show project my-project --web` in the command line.
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### @nx/detox Configuration
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The `@nx/detox/plugin` is configured in the `plugins` array in `nx.json`.
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```json {% fileName="nx.json" %}
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{
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"plugins": [
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{
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"plugin": "@nx/detox/plugin",
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"options": {
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"buildTargetName": "build",
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"startTargetName": "start",
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"testTargetName": "test"
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}
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}
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]
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}
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```
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Once a Detox configuration file has been identified, the targets are created with the name you specify under `buildTargetName`, `startTargetName` or `testTargetName` in the `nx.json` `plugins` array. The default names for the inferred targets are `build` and `test`.
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{% /tab %}
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{% tab label="Nx < 18" %}
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Install the `@nx/detox` package with your package manager.
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```shell
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npm add -D @nx/detox
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```
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### Generating Applications
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By default, when creating a mobile application, Nx will use Detox to create the e2e tests project.
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```shell
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nx g @nx/react-native:app apps/frontend --e2eTestRunner=deotx
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nx g @nx/expo:app apps/frontend --e2eTestRunner=detox
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```
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## Using Detox
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### Testing Applications
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- Run `nx test-ios frontend-e2e` to build the iOS app and execute e2e tests with Detox for iOS (Mac only)
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- Run `nx test-android frontend-e2e` to build the Android app and execute e2e tests with Detox for Android
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You can run below commands:
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- `nx build-ios frontend-e2e`: build the iOS app (Mac only)
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- `nx build-android frontend-e2e`: build the Android app
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### Testing against Prod Build
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You can run your e2e test against a production build:
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- `nx test-ios frontend-e2e --prod`: to build the iOS app and execute e2e tests with Detox for iOS with Release configuration (Mac only)
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- `nx test-android frontend-e2e --prod`: to build the Android app and execute e2e tests with Detox for Android with release build type
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- `nx build-ios frontend-e2e --prod`: build the iOS app using Release configuration (Mac only)
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- `nx build-android frontend-e2e --prod`: build the Android app using release build type
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## Configuration
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### Using .detoxrc.json
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If you need to fine tune your Detox setup, you can do so by modifying `.detoxrc.json` in the e2e project.
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#### Change Testing Simulator/Emulator
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For iOS, in terminal, run `xcrun simctl list devices available` to view a list of simulators on your Mac. To open your active simulator, `run open -a simulator`. In `frontend-e2e/.detoxrc.json`, you could change the simulator under `devices.simulator.device`.
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For Android, in terminal, run `emulator -list-avds` to view a list of emulators installed. To open your emulator, run `emulator -avd <your emulator name>`. In `frontend-e2e/.detoxrc.json`, you could change the simulator under `devices.emulator.device`.
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In addition, to override the device name specified in a configuration, you could use `--device-name` option: `nx test-ios <app-name-e2e> --device-name "iPhone 11"`. The `device-name` property provides you the ability to test an application run on specific device.
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```shell
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nx test-ios frontend-e2e --device-name "iPhone 11"
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nx test-android frontend-e2e --device-name "Pixel_4a_API_30"
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```
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