Simple React Native Typescript with Jest Testing Library

What is a Test?

• Code you write to verify the behavior of your application.
• Tests are a specifications for hwo our code should work.
• Verify that engineers are following best practices and conventions for your team.
• We write tests because it allows us to ship quality code faster.

Types of Tests?

• End-to-End: Spin up your app and simulate user behaviour. Kind of like a robot performing a task in your app.
• Integration: Verify that multiple units work together.
• Unit: Verify the functionality of a single function/component.
• Static: Catch typos and errors while riting code.

A Jest Test

const expected = true;
const actual = false;

test("it works", () => {
    expect(actual).toBe(expected);
});

• npx react-native init MyApp --template react-native-template-typescript

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

• Official Docs - https://testing-library.com/docs/

• npm run test --watch