Gain insights into using React Hooks to enhance code composition and reuse. Delve into custom hooks, global state management, unit testing, and the useDependency Pattern for enterprise-level coding.

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In this course, you will learn how to use React Hooks, which will help you achieve better code composition, code reuse, and unit testing ability as opposed to using class components.

You’ll start by reviewing what React Hooks are all about and why we need them. This will set the stage for the rest of the course. After that you will dive into the Hooks API, how to manage application state globally, as well as how to create custom hooks.

In the second half, you’ll get into unit testing and how to work with the popular useDependency Pattern. By the end of this course, you’ll have the confidence to write enterprise-level React Hooks code.

A Deep Dive into React Hooks

# The benefits and an example

`react-hooks-testing-library` is an open-source **npm** package that tests React Hooks. 

The Testing Library makes it easier to interact with a hook during unit testing. Some benefits are mentioned below:

- Renders the hook using `renderHook` helper and provides the `result`

- Allows you to access properties from hook output by using  `result.current`. This reference is set to the output of the currently rendered hook.

- Provides `act` helper which can be used to trigger functions returned by hook. `act` automatically re-renders the hook and sets the `result.current` reference accordingly. 

- Allows testing of the React hooks independently of React components. This is useful for testing complex business logic defined in a hook and it covers all possible scenarios.

The following example shows how to use the Testing Library to test the example from the previous lesson.


Examine the usage for the React Hooks Testing Library and when it should be used.

Introduction

Getting Started with React Hooks

React Hooks API

Advanced: Deep Dive into useEffect Hook

Managing Global State with Hooks

Create Your Own Hooks

Unit Testing for React Hooks

Advanced: useDependency Pattern with Hooks

Conclusion

React Hooks Testing Library

The benefits and an example