uvu VS tsdx

Last but not least important are ava, uvu and tape; they are a really light and fast test runners.

Vitest: A Vite-native unit test framework. (alternative: Jest, uvu)

Most important here is not to forget to include test.run() at the end… I’ve done that a few times 😅. Notice how we are able to use aliases in lines 1–3. You can see the full range of assert methods available in the uvu docs.

For the past few weeks I’ve taken the (arguably pointless) work of migrating Felte from using Jest to uvu. This is a really tedious work by itself, but one of details that would have made this work even more tedious is that Jest prefers assertions to the style of expect(…).toBe* while uvu gives you freedom to choose any assertion library, although there’s an official uvu/assert module that comes with assertions to the style of assert.is(value, expected).

Hello everyone, I'm using uvu for testing. And installed c8 for coverage. Yet it doesn't seem to be able to pick up test .svelte files. Does anyone knows how to achieve this or any other way of getting .svelte files coverage? Thanks

Yes! There’s even an example test written for the svelte counter demo in the repo’s examples!

uvu is what I’d recommend.

I really enjoy Ava [1] or anything assert-tape-like [2]. "uvu" [3] is getting a lot of love lately, but it's very feature limited and much of it's touted advantages are at the detriment to feature set.

[1] https://github.com/avajs/ava

[2] https://github.com/substack/tape

[3] https://github.com/lukeed/uvu

Jest is great for front-end (or full stack integration) testing, but I feel it's specialized for that use-case and doesn't always play nice with backend/middle-tier testing needs.

For Node, I lean towards UVU by @lukeed due to its simplicity. Its lightweight, fast, supports ESM out of the box. It feels like an easier to setup modern Mocha (without the wide array of plugins).

tsdx - Zero-config CLI for TypeScript package development

If you’re into TypeScript, I highly recommend https://tsdx.io . I’ve used it to create a package before and it’s so much easier

Thanks for the insight fellas. Aside question, I was thinking of bootstrapping the project with tsdx, but their last release was well over 2 years ago. Wondering if there are any alternative options for creating libraries?

NOTE: If your project uses TypeScript, I would suggest using tsdx instead.

Sadly, it's a bit dead. We switched to dts-cli fork, but tsup looks good too

I don't depend on the actual typescript docs much but thankfully in @types and in tons of repos there are examples of well written typescript code.

The amount of JS and TS out there is also a bit of a foot gun though so stick with heavily used/starred libs if you aren't sure.

One tool that helps a lot with developing libraries in typescript is TSDX[0] or its successor dts-cli[1] and there is a bunch of good stuff in awesesome-typescript[2].

Maybe library devving is harder?(more work?) with tyepscript but it is worth it for the end developer, especially if that end developer is you. If you aren't using your own libs then you're probably getting paid by someone else to make them or... idk.

https://github.com/jaredpalmer/tsdx

We will use a TSDX library - this tool is something similar to create-react-app, but for creating components library. It allows as to initialize a project immediately with already set up bundler, Rollup with Typescript supporting, testing with Jest, code formatter, Prettier and Storybook.

May be you need to try https://tsdx.io/

So what is the ideal way to build TypeScript libraries? I've heard that tsdx https://tsdx.io/ is quite good

There’s tsdx. But I’d recommend using Vite and storybook-vite