To use DOM Testing Library with [Svelte](https://svelte.technology/), we’ll write a custom render function that utilizes the getQueriesForElement function. We’ll take the svelte template and create a constructor for that as well as the data to interpolate. Then we can use dom-testing-library queries as normal.

If you like this, checkout [Svelte Testing Library](https://github.com/testing-library/svelte-testing-library).

Use DOM Testing Library to test any JS framework

Use DOM Testing Library with Svelte

Instructor: 0:00 For Svelte, we have the counter in a different file, `counter.svelte`, a Svelte file where we have our scripts and our template here. Over in `svelte.testjs`, we have that counter component and we're going to pass that to the `render` method that let's make right now.

0:13 I'll make a `function` called `render()`. This is going to take our `Component` and we're going to need a `container = document.createElement()` and make that `div`. Then we're going to initialize the component, so we'll say `new Component` and we'll pass it the `target`, which it that `container`. This is going to effectively mount this component to that container.

0:35 Then we'll `return getQueriesForElement` on that `container`. 

#### svelte.test.js
```js
function render(Component) {
  const container = document.createElement('div')

  new Component({target: container})

  return getQueriesForElement(container)
}
```

With that, we've got the passing test. Cool. Just to make this a little bit more convenient, we'll add the `container` as the thing that we return in addition to all the properties for the `getQueriesForElement`.

```js
function render(Component) {
  const container = document.createElement('div')

  new Component({target: container})

  return {container, ...getQueriesForElement(container)}
}
```

0:54 What we do in the Svelte case is we take that `Component` that we're getting from Svelte, we pass that to our `render` and then we create a `container`. We tell our `Component` to initialize itself onto that `container` and then we `return` that `container` with all of the queries for that container element.

1:11 You'll notice here that we're also using the `fireEventAsync`, which is just a simple abstraction on top of DOM testing library's `fireEvent` and `wait` utilities to make sure that after we fire the event, we `wait` for the next tick of the event loop before resolving this promise.

1:28 That way, Svelte has a chance to do its updates to the DOM, which it does asynchronously. Then we `await` that `fireEventAsync`, before we do any of our assertions.

The person using your application components shouldn’t have to know or care what framework(s) you used to write your application. Guess what: Neither should your tests. 

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Intro to Use DOM Testing Library to test any JS framework

To use DOM Testing Library with [React](https://reactjs.org/), we’ll write a custom render function that utilizes the getQueriesForElement function. Because React binds all event handlers to the body we’ll have to append our container to the body and we’ll add a cleanup method to unmount the component and cleanup the DOM. If you like this, checkout [react-testing-library](https://github.com/kentcdodds/react-testing-library).

If you like this, checkout [React Testing Library](https://testing-library.com/react).

Use DOM Testing Library with React

To use DOM Testing Library with [Preact](https://preactjs.com/), we’ll write a custom render function that utilizes the getQueriesForElement function. Because preact re-renders asynchronously, we’ll use a custom fireEventAsync function to ensure that the app has re-rendered after every event we fire. If you like this, checkout [preact-testing-library](https://github.com/antsmartian/preact-testing-library).

If you like this, checkout [Preact Testing Library](https://testing-library.com/preact).

Use DOM Testing Library with Preact

To use DOM Testing Library with [jQuery](https://jquery.com/), we’ll create a DOM node and apply our jQuery plugin to that DOM node, then we can use getQueriesForElement on that DOM node to get the queries we need to start writing out our tests.

Use DOM Testing Library with jQuery

To use DOM Testing Library with [Dojo](https://dojotoolkit.org/), we’ll write a custom render function that utilizes the getQueriesForElement function and dojo’s widge-core utilities.

Use DOM Testing Library with Dojo

To use DOM Testing Library with [HyperApp](https://github.com/jorgebucaran/hyperapp), we’ll write a custom render function that utilizes the getQueriesForElement function. HyperApp renders and re-renders asynchronously, so we’ll use a custom `fireEventAsync` utility function to ensure that the app has re-rendered after every event we fire.

Use DOM Testing Library with HyperApp

To use DOM Testing Library with [AngularJS](https://angularjs.org/), we’ll write a custom render function. We’ll pass our template and angular module we’d like to use for bootstrapping a mini-app inside a div we create, then use getQueriesForElement for that mini-app container. From there we can use all the regular utilities we enjoy from dom-testing-library.

Use DOM Testing Library with AngularJS

To use DOM Testing Library with [Angular](https://angular.io/), we’ll write a custom render function that utilizes the getQueriesForElement function. Here we need to create a test bed testing module which we’ll use to get a native element for our container.

If you like this, checkout [Angular Testing Library](https://testing-library.com/angular).

Use DOM Testing Library with Angular

To use DOM Testing Library with [VueJS](https://vuejs.org/), we’ll write a custom render function that utilizes the getQueriesForElement function. Vue is another library that re-renders asynchronously, so we’ll use that custom fireEventAsync to ensure that we wait until the next tick of the event loop before making further queries. If you enjoy this, checkout [vue-testing-library](https://github.com/dfcook/vue-testing-library).

Use DOM Testing Library with VueJS

To use DOM Testing Library with [Mithril](https://mithril.js.org/), we’ll write a custom render function which mounts a mithril component and then utilize the getQueriesForElement function on the container where it’s been mounted. Mithril is unique in how it re-renders so we’ll use dom-testing-library’s `wait` function for our assertions.

Use DOM Testing Library with Mithril

To use DOM Testing Library with [from-html](https://github.com/m3g4p0p/from-html), we’ll write a custom render function that utilizes the getQueriesForElement function. In our situation we’ve made a custom “component” class for from-html, we mount that manually and then we can use DOM Testing Library's queries on the container we create.

Use DOM Testing Library with Svelte

Transcript

Use DOM Testing Library with Svelte