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with-detox-tests

Demonstrates integration of the Detox gray box end-to-end testing library with Expo. Uses detox, detox-expo-helpers and expo-detox-hooks.

Try it out

1. Install dependencies.

This is taken from Step 1 here: https://github.com/wix/detox/blob/master/docs/Introduction.GettingStarted.md#step-1-install-dependencies

Install the latest version of Homebrew

Homebrew is a package manager for macOS, we'll need it to install other command line tools.

TIP: Verify it works by typing in terminal brew -h to output list of available commands

Install Node.js

Node is the JavaScript runtime Detox will run on. Install Node 8.3.0 or above

brew update && brew install node

TIP: Verify it works by typing in terminal node -v to output current node version, should be 8.3.0 or higher

Install applesimutils

A collection of utils for Apple simulators, Detox uses it to communicate with the simulator.

brew tap wix/brew
brew install applesimutils

TIP: Verify it works by typing in terminal applesimutils to output the tool help screen

Install Detox command line tools (detox-cli)

This package makes it easier to operate Detox from the command line. detox-cli should be installed globally, enabling usage of the command line tools outside of your npm scripts. detox-cli is merely a script that passes commands through to a the command line tool shipped inside detox package (in node_modules/.bin/detox).

npm install -g detox-cli

2. Run yarn.

This installs all the packages then runs ./scripts/download_expo_app.sh. This should grab the latest Expo app and place it inside bin/

3. Start the packager:

expo start (if you don't have expo installed, yarn global add expo).

4. npm run e2e

Notes

This example includes a patch to the version of the detox library used (version 14.4.1).

This is needed to prevent a timeout issue running tests. The live reloading in expo seems to need detox to blacklist some URLs that is otherwise sees as network activity and waits until they stop.

The docs for this paramater are here: https://github.com/wix/Detox/blob/master/docs/APIRef.DeviceObjectAPI.md#10-initialize-the-url-blacklist-at-device-launch

However it seems this commit broke this functionality: https://github.com/wix/Detox/commit/32be293774383d631d0938300175204d4222dd13

🤷‍

For more information see these links: wix/Detox#1422 (comment) wix/Detox#1627