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

# Testing hooks by creating a test component

The most simple way to test a hook is by using a test component and then calling the custom hook in this component.

From the previous example, if you have a custom hook like this:
```
const useContent = () => {
  const [state] = useState("some text");
  return state;
};
```
Then, you can create a `TestComponent` to return output of the above hook: 

```
const TestComponent = () => {
  return useContent();
};
```

The following example demonstrates testing with Enzyme and Jest in `useContent.test.js`. `shallow` on Line #14 renders `TestComponent`. Line #15 tests the text available in the wrapper. This test is enough to determine whether the output of the hook was correctly available or not.


Explore the techniques for manually testing React Hooks.


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

Manual Approach to Testing Hooks

Testing hooks by creating a test component