Book Image

Full Stack Development with Spring Boot 3 and React - Fourth Edition

By : Juha Hinkula
5 (1)
Book Image

Full Stack Development with Spring Boot 3 and React - Fourth Edition

5 (1)
By: Juha Hinkula

Overview of this book

If you’re an existing Java developer who wants to go full stack or pick up another frontend framework, this book is your concise introduction to React. In this three-part build-along, you’ll create a robust Spring Boot backend, a React frontend, and then deploy them together. This new edition is updated to Spring Boot 3 and includes expanded content on security and testing. For the first time ever, it also covers React development with the in-demand TypeScript. You’ll explore the elements that go into creating a REST API and testing, securing, and deploying your applications. You’ll learn about custom Hooks, third-party components, and MUI. By the end of this book, you'll be able to build a full stack application using the latest tools and modern best practices.
Table of Contents (23 chapters)
1
Part I: Backend Programming with Spring Boot
8
Part II: Frontend Programming with React
14
Part III: Full Stack Development
21
Other Books You May Enjoy
22
Index

Firing events in tests

The React Testing Library provides a fireEvent() method that can be used to fire DOM events in your test cases. The fireEvent() method is used in the following way. First, we have to import it from the React Testing Library:

import { render, screen, fireEvent } from '@testing-library/react';

Next, we have to find the element and trigger its event. The following example shows how to trigger an input element’s change event and a button’s click event:

// Find input element by placeholder text
const input = screen.getByPlaceholderText('Name');
// Set input element's value
fireEvent.change(input, {target: {value: 'John'}});
// Find button element by text
const btn = screen.getByText('Submit');
// Click button
fireEvent.click(btn);

After the events are triggered, we can assert the expected behavior.

There is also a companion library for the Testing Library that is called user-event. The...