Generate unit tests using CodiumAI
Generate unit tests using CodiumAI
By Alexey Ses
3 min read
Unit tests are an essential part of software development. Tests help you to ensure that the code works as you expect. It takes time to create all necessary tests. But there is a way to generate them.
- Authors
- Name
- Alexey Ses
- linkedinAlexey Ses
- Github
- githubGanjaGanja
What is Unit testing
Unit testing ensures that pieces of code work the way you expect them to. Performing unit tests is designed to be simple, generally, the tests are written in the form of functions that will determine whether a returned value equals the value you were expecting.
CodiumAI for unit tests generation
I've recently tried unit tests generation with CodiumAI. It's an extension for VS Code and Intellij Idea that is free to use for independent developers. It supports JavaScript, TypeScript and a variety of other programming languages. Let me show you how it works.
How to install CodiumAI in VS Code
First of all, you need to install it. CodiumAI supports VS Code. Open VS Code Extensions section, search for "CodiumAI" and install it.
How to install CodiumAI in IntelliJ Idea
To install CodiumAI in IntelliJ Idea, go to Settings -> Plugins -> search for "CodiumAI", install it and then restart IntelliJ Idea:
How to generate unit tests
Here's an example of TypeScript code that will be used for unit tests generation:
export interface User {
userId: string
userName: string
}
export class AuthService {
searchUsersByName(users: User[], userName: string) {
return users.filter((user) => user.userName.toLowerCase().includes(userName.toLowerCase()))
}
}
Tests generation with CodiumAI works similarly in VS Code and IntelliJ Idea. Here's how to do it in VS Code:
And here's how you can do the same thing in IntelliJ Idea:
Starting from here I will use VS Code only for tests generation. It works similarly in IntelliJ Idea.
Generate custom unit test
Let's say we need a custom unit test that would make our test users have name and surname separated by space as part of their "userName" string. Example: "Jane Doe". So this test:
returns an array of users, users should have names that contain name and surname separated by space
We can generate that custom test using the Behaviours Coverage section:
Now, a custom unit test is generated and added to the list of tests.
Run all unit tests
Time to run the tests!
That might require you to have one of the testing libraries (Jest, Mocha, Karma Jasmine, etc.) installed and configured in your project. The only available Test Framework from the Configuration section that worked without any configuration with my simple code example is "React Testing Library". Here's how it works:
Fix the code with CodiumAI suggestions
You might find one of the tests broken, due to edge case. CodiumAI would suggest you to fix the code. Here's one of CodiumAI's suggestions that could fix several edge cases:
Now it's time to apply the code suggestion:
Suggestion is applied, and all unit tests are generated. Now you can copy-paste unit tests into your project.
That was the last feature that I wanted to share with you. There are many others that you can try as well.
CodiumAI is not perfect
You should always double-check the tests CodiumAI generates
That's the warning from the CodiumAI team. They've made an amazing tool to make you more productive as you develop unit tests. But don't forget to check what AI generated for you. Happy coding!
Upcoming events
Coven of Wisdom - Herentals - Winter `24 edition
Worstelen jij en je team met automated testing en performance? Kom naar onze meetup waar ervaren sprekers hun inzichten en ervaringen delen over het bouwen van robuuste en efficiënte applicaties. Schrijf je in voor een avond vol kennis, heerlijk eten en een mix van creativiteit en technologie! 🚀 18:00 – 🚪 Deuren open 18:15 – 🍕 Food & drinks 19:00 – 📢 Talk 1 20:00 – 🍹 Kleine pauze 20:15 – 📢 Talk 2 21:00 – 🙋♀️ Drinks 22:00 – 🍻 Tot de volgende keer? Tijdens deze meetup gaan we dieper in op automated testing en performance. Onze sprekers delen heel wat praktische inzichten en ervaringen. Ze vertellen je hoe je effectieve geautomatiseerde tests kunt schrijven en onderhouden, en hoe je de prestaties van je applicatie kunt optimaliseren. Houd onze updates in de gaten voor meer informatie over de sprekers en hun specifieke onderwerpen. Over iO Wij zijn iO: een groeiend team van experts die end-to-end-diensten aanbieden voor communicatie en digitale transformatie. We denken groot en werken lokaal. Aan strategie, creatie, content, marketing en technologie. In nauwe samenwerking met onze klanten om hun merken te versterken, hun digitale systemen te verbeteren en hun toekomstbestendige groei veilig te stellen. We helpen klanten niet alleen hun zakelijke doelen te bereiken. Samen verkennen en benutten we de eindeloze mogelijkheden die markten in constante verandering bieden. De springplank voor die visie is talent. Onze campus is onze broedplaats voor innovatie, die een omgeving creëert die talent de ruimte en stimulans geeft die het nodig heeft om te ontkiemen, te ontwikkelen en te floreren. Want werken aan de infinite opportunities van morgen, dat doen we vandaag.
| Coven of Wisdom Herentals
Go to page for Coven of Wisdom - Herentals - Winter `24 editionMastering Event-Driven Design
PLEASE RSVP SO THAT WE KNOW HOW MUCH FOOD WE WILL NEED Are you and your team struggling with event-driven microservices? Join us for a meetup with Mehmet Akif Tütüncü, a senior software engineer, who has given multiple great talks so far and Allard Buijze founder of CTO and founder of AxonIQ, who built the fundaments of the Axon Framework. RSVP for an evening of learning, delicious food, and the fusion of creativity and tech! 🚀 18:00 – 🚪 Doors open to the public 18:15 – 🍕 Let’s eat 19:00 – 📢 Getting Your Axe On Event Sourcing with Axon Framework 20:00 – 🍹 Small break 20:15 – 📢 Event-Driven Microservices - Beyond the Fairy Tale 21:00 – 🙋♀️ drinks 22:00 – 🍻 See you next time? Details: Getting Your Axe On - Event Sourcing with Axon Framework In this presentation, we will explore the basics of event-driven architecture using Axon Framework. We'll start by explaining key concepts such as Event Sourcing and Command Query Responsibility Segregation (CQRS), and how they can improve the scalability and maintainability of modern applications. You will learn what Axon Framework is, how it simplifies implementing these patterns, and see hands-on examples of setting up a project with Axon Framework and Spring Boot. Whether you are new to these concepts or looking to understand them more, this session will provide practical insights and tools to help you build resilient and efficient applications. Event-Driven Microservices - Beyond the Fairy Tale Our applications need to be faster, better, bigger, smarter, and more enjoyable to meet our demanding end-users needs. In recent years, the way we build, run, and operate our software has changed significantly. We use scalable platforms to deploy and manage our applications. Instead of big monolithic deployment applications, we now deploy small, functionally consistent components as microservices. Problem. Solved. Right? Unfortunately, for most of us, microservices, and especially their event-driven variants, do not deliver on the beautiful, fairy-tale-like promises that surround them.In this session, Allard will share a different take on microservices. We will see that not much has changed in how we build software, which is why so many “microservices projects” fail nowadays. What lessons can we learn from concepts like DDD, CQRS, and Event Sourcing to help manage the complexity of our systems? He will also show how message-driven communication allows us to focus on finding the boundaries of functionally cohesive components, which we can evolve into microservices should the need arise.
| Coven of Wisdom - Utrecht
Go to page for Mastering Event-Driven DesignThe Leadership Meetup
PLEASE RSVP SO THAT WE KNOW HOW MUCH FOOD WE WILL NEED What distinguishes a software developer from a software team lead? As a team leader, you are responsible for people, their performance, and motivation. Your output is the output of your team. Whether you are a front-end or back-end developer, or any other discipline that wants to grow into the role of a tech lead, RSVP for an evening of learning, delicious food, and the fusion of leadership and tech! 🚀 18:00 – 🚪 Doors open to the public 18:15 – 🍕 Let’s eat 19:00 – 📢 First round of Talks 19:45 – 🍹 Small break 20:00 – 📢 Second round of Talks 20:45 – 🙋♀️ drinks 21:00 – 🍻 See you next time? First Round of Talks: Pixel Perfect and Perfectly Insane: About That Time My Brain Just Switched Off Remy Parzinski, Design System Lead at Logius Learn from Remy how you can care for yourself because we all need to. Second Round of Talks: Becoming a LeadDev at your client; How to Fail at Large (or How to Do Slightly Better) Arno Koehler Engineering Manager @ iO What are the things that will help you become a lead engineer? Building Team Culture (Tales of trust and positivity) Michel Blankenstein Engineering Manager @ iO & Head of Technology @ Zorggenoot How do you create a culture at your company or team? RSVP now to secure your spot, and let's explore the fascinating world of design systems together!
| Coven of Wisdom - Amsterdam
Go to page for The Leadership Meetup