Enzyme VS Next.js

Probably Enzyme was the first to popularize component testing in React by doing shallow rendering and expecting some things to be there in the React component tree. Then React Testing library came and took component testing to a whole new level.

Enzyme is another popular testing utility for React. It allows you to manipulate and traverse React components' output, making it easier to write comprehensive tests.

ljharb is an extremely interesting person. There’s no doubting the positive impact he’s had on the OSS community and the work he’s done.

However, there are some things he does that are incomprehensible.

For example, Enzyme. Over three years ago this issue was opened for Enzyme on React 17: https://github.com/enzymejs/enzyme/issues/2429

Nothing moved for a while, and I think he said something along the lines of “if you want React 17 support, stop complaining and help”. So the community got involved. There are multiple PRs adding React 17 support. Many unofficial React 17 adapters. A lot of people have put a lot of work into this, ensuring compatibility, coverage etc. Yet to this day, none of them have been merged. Eg https://github.com/enzymejs/enzyme/pull/2564

Given the amount of time that has passed, and the work the community has put in, something is amiss. It feels like he’s now intentionally avoiding React 17+ support. But why? I don’t understand why someone would ask for help then ignore the help when it comes in. That isn’t much better than the swathe of rude/entitled comments he was getting on the issue before he locked it.

I ended up migrating to RTL, but this made many of my tests more complicated (especially compared to shallow rendering).

Enzyme Documentation

One way to do this is by writing tests for your React components. Tools like Jest and Enzyme make it easy to test your component's behavior, rendering output, and state changes. By writing tests for your components, you can ensure that they behave as expected and prevent issues before they reach production.

GitHub link: https://github.com/enzymejs/enzyme

So If you have experience with enzyme testing, where you might be checking the value of state once you click any button or you might be checking the prop value If something changes.

Enzyme offers two types of API for shallow rendering and full rendering. Both are preferred for different test scenarios and functionalities.

At Visa, I was writing unit tests for a Next.js project using components designed with Chakra UI. That's where React Testing Library came in handy. Unlike other solutions like Enzyme, I did not have to worry about the application snapshot but could instead focus on each UI element, its expected behaviour and the data it would render upon user interactions.

Superset uses Jest and React Testing Library (RTL) to write unit and integration tests. In the past we used Enzyme, but now that we're currently converting all of our class components to functional components, Enzyme cannot support our testing needs. Since RTL is better for testing functional components, we're converting all of our test files to RTL. This can be quite a learning curve - I've gone through a lot of the process so I'd like to share what I've learned so far.

Next.js is a powerful React framework that enables developers to build server-rendered applications, static websites, and more. It's designed for production and provides features like automatic code splitting and optimized prefetching.

// source: https://github.com/vercel/next.js/blob/canary/packages/next/src/lib/worker.ts#L121C15-L129C16 for (;;) { onActivity() const result = await Promise.race(\[ (this.\_worker as any)\[method\](...args), restartPromise, \]) if (result !== RESTARTED) return result if (onRestart) onRestart(method, args, ++attempts) }

https://github.com/vercel/next.js/discussions/27666 One of them said 'renaming folder to uppercase' might cause trouble. git might not recognize case-sensetive changes by default.

Next.js has long cemented itself as one of the front runners in the web framework world for JavaScript/TypeScript projects so we’re going to be using that. More specifically we’re going to be using V14 of Next.js which allows us to use some exciting new features like Server Actions and the App Router.

Web frameworks like Next.js will usually include this feature, but do check that they set the caching headers correctly!

Vite and Next.js are both top 5 modern development framework right now. They are both great depending on your use case so we’ll discuss 4 areas: Architecture, main features, developer experience and production readiness. After learning about these we’ll have a better idea of which one is best for your project.

> It’s important to be aware of what you are getting if you go with React, and what you are getting is a far cry from what a framework would offer, with all the corresponding pros and cons.

Would you like to elaborate on that?

In my experience, with something as great, size/ecosystem-wise as React, there will almost always be at least one "mainstream" package for whatever you might want to do with it, that integrates pretty well. Where a lot of things might come out of the box with a framework, with a library I often find myself just needing to install the "right" package, and from there it's pretty much the same.

For example, using https://angular.io/guide/i18n-overview or installing and using https://react.i18next.com/

Or something like https://angular.io/guide/form-validation out of the box, vs installing and using https://formik.org/

Or perhaps https://angular.io/guide/router vs https://reactrouter.com/en/main

Even adding something that's not there out of the box is pretty much the same, like https://primeng.org/ or https://primereact.org/

React will typically have more fragmentation and therefore also choice, but I don't see those two experiences as that different. Updates and version management/supply chain will inevitably be more of a mess with the library, admittedly.

Now, projects like Next https://nextjs.org/ exist and add what some might regard as the missing pieces and work well if you want something opinionated and with lots of features out of the box, but a lot of those features (like SSR) are actually pretty advanced and not always even necessary.

Next.js: For the website and the admin dashboard

Until the time of writing, there is no official example of how to enable runtime environmental variables in a Dockerized Next.js app, as utilizing unstable_noStore would only dynamically evaluate variables on the server (node.js runtime). There is also an interesting discussion regarding this topic on GitHub.

next.js is a very popular React framework. remix-adonisjs includes more functionality through the AdonisJS backend ecosystem, and should be easier to self-host and self-manage.