JavaScript Unit Test Best Practices — Hooks and APIs

JavaScript Unit Test Best Practices — Hooks and APIs

Knowing a test framework well is useful. Unit tests are very useful for checking how our app is working. Otherwise, we run into all kinds of issues later on. In this article, we’ll look at some best practices we should follow when writing JavaScript unit tests.

Unit tests are very useful for checking how our app is working.

Otherwise, we run into all kinds of issues later on.

In this article, we’ll look at some best practices we should follow when writing JavaScript unit tests.

Properly Set Up the Actions that Apply to All the Tests Involved

If we’re running the same thing before every test, we should put it in a beforeEach hook.

This way, we run the same piece of code before each test without repeating the code.

For example, we can write:

describe('Saving the user profile', () => {

  beforeEach(() => {
    login();
  });
  it('should save updated profile setting to database', () => {
    //...
    expect(request.url).toBe('/profiles/1');
    expect(request.method).toBe('POST');
    expect(request.data()).toEqual({ username: 'james' });
  });
  it('should notify the user', () => {
    //...
  });
});
  it('should redirect user', () => {
    //...   
  });
});

Likewise, if we have some code that we’ve to run after each test, we should have an afterEach hook that runs after each test:

describe('Saving the user profile', () => {

  beforeEach(() => {
    login();
  });
  afterEach( () => {
    logOut();
  });
  it('should save updated profile setting to database', () => {
    //...
    expect(request.url).toBe('/profiles/1');
    expect(request.method).toBe('POST');
    expect(request.data()).toEqual({ username: 'james' });
  });
  it('should notify the user', () => {
    //...
  });
  it('should redirect user', () => {
    //...   
  });
});

technology web-development software-development javascript programming

Bootstrap 5 Complete Course with Examples

Bootstrap 5 Tutorial - Bootstrap 5 Crash Course for Beginners

Nest.JS Tutorial for Beginners

Hello Vue 3: A First Look at Vue 3 and the Composition API

Building a simple Applications with Vue 3

Deno Crash Course: Explore Deno and Create a full REST API with Deno

How to Build a Real-time Chat App with Deno and WebSockets

Convert HTML to Markdown Online

HTML entity encoder decoder Online

Offshore Software Development - Best Practices

To make the most out of the benefits of offshore software development, you should understand the crucial factors that affect offshore development.

Software Developer vs Web Developer | Difference Web Developer & Software Developer

Software Developer vs Web Developer | Difference Web Developer & Software Developer | Software development and web development are normally used interchangeably. Although both include development, a software developer has different responsibilities from that of a web developer.

ERP Software Services, POS Software Services , Application Development

Vinew Technologies focused majorly over ERP Software services and POS Software services, Web & Application development services & Woo commerce and Wordpress easy-to-use, multipurpose social media plugin for WordPress.

5 Core Criteria for Selecting Software Development Company - TopDevelopers.co

Check out these five criteria for the selection of your software vendor, and you will never regret having the wrong quality product made for you.

Offshore Software and Web Application Development Company- MobiWeb Technologies

Mobiweb Technologies is a prestigious IT company headquartered in Indore providing promising and cost effective software and web development services across the globe.