Requirements

1. You need to have Node.js and npm (Node Package Manager) installed on your development machine. You can download them from https://nodejs.org/.
2. I have used Expo for development, So Expo is Recommended.

npm i expo

3. You should have Git installed on your machine. You can download Git from https://git-scm.com/.

Installation

Clone the repo

git clone https://github.com/Rishi-Sudhakar/reactnativetest.git

This will clone the repo to the default directory of the Terminal.

Now do,

cd reactnativetest

This will locate the project directory.

I haven't included the node_modules package along with the repo, So they have to be installed manually.

npm install @react-navigation/native @react-navigation/stack react-native-reanimated react-native-gesture-handler react-native-screens

Now as the Modules are added, you can start running the program,

npm start

This will automatically start with expo, and you will be provided with options on the screen.

You can just use expo go app (android), or camera app in ios.

If you want the program to run locally in the machine (Android/iOS Virtual Machine), you can click "a" (For android), It will automatically open the Android VM in Android studio, or "i" for iOS which will open iPhone simulator in Xcode (This, However would require a Macintosh device)

While running, Use credentials, Username: admin Password: admin@123

Now, data is fetched from JSONPlaceholder API (Free REST API) and is presented on the screen.

For testing, you have to first install test modules

npm install --save-dev jest @testing-library/react-native @testing-library/jest-native

As you can see I have used Jest for testing.

Now, You can run

npm test

for testing purposes. (I have made LoginScreen.test.js for testing, so it will be tested)