npm package: @putout/plugin-vitest
Description: 🐊Putout plugin helps with migration to latest vitest of Vitest
Author: coderaiser
Latest version: 4.0.0

# @putout/plugin-vitest [![NPM version][NPMIMGURL]][NPMURL]

[NPMIMGURL]: https://img.shields.io/npm/v/@putout/plugin-vitest.svg?style=flat&longCache=true
[NPMURL]: https://npmjs.org/package/@putout/plugin-vitest "npm"

> A Vite-native testing framework. It's fast!
>
> (c) [vitest.dev](https://vitest.dev/)

🐊[**Putout**](https://github.com/coderaiser/putout) plugin helps to [migrate to latest version of vitest](https://vitest.dev/guide/migration.html#migration-guide).

## Install

```
npm i @putout/plugin-vitest -D
```

## Rules

- ✅ [apply-hoisted](#apply-hoisted);
- ✅ [convert-jest-to-vitest](#convert-jest-to-vitest);
- ✅ [v3-apply-options-as-second-argument](#v3-apply-options-as-second-argument);
- ✅ [v3-apply-browser-instances](#v3-apply-browser-instances);

## Config

```json
{
    "rules": {
        "vitest/apply-hoisted": "on",
        "vitest/convert-jest-to-vitest": "on",
        "vitest/v3-apply-options-as-second-argument": "on",
        "vitest/v3-apply-browser-instances": "on"
    },
    "plugins": ["vitest"]
}
```

## apply-hoisted

> All static import statements in ES modules are hoisted to the top of the file, so any code that is defined before the imports will actually be executed after imports are evaluated.
>
> (c) [vitest.dev](https://vitest.dev/api/vi.html#vi-hoisted)

Checkout in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/1ce501a96baced5c46b07aac1cbdb1ff/70d2710641f57c20781208a28a81cf3a04c79a37).

### ❌ Example of incorrect code

```js
let hello;
let world;

it('hello', () => {
    hello.calledWith();
});
```

### ✅ Example of correct code

```js
const hoisted = vi.hoisted({
    hello: vi.fn(),
    world: vi.fn(),
});

beforeEach(() => {
    hello.mockClear();
    world.mockClear();
});

it('hello', () => {
    hoisted.hello.calledWith();
});
```

## convert-jest-to-vitest

Checkout in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/b0e8f88c13ada02f3ce296948d9eac96/26277e77ec3bd28d2f7568e55cedfb0961c3f2ea).

### ❌ Example of incorrect code

```js
jest.mock('hello', {
    ...jest.requireActual('hello'),
    abc: jest.fn(),
});
```

### ✅ Example of correct code

```js
vi.mock('hello', async () => ({
    ...await vi.importActual('hello'),
    abc: vi.fn(),
}));
```

## v3-apply-options-as-second-argument

> Vitest 3.0 prints a warning if you pass down an object as a third argument to test or describe functions.
> Vitest 4.0 will throw an error if the third argument is an object.
>
> (c) [vitest.dev](https://vitest.dev/guide/migration.html#test-options-as-a-third-argument)

Checkout in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/908b58a6478a26c5ef14c5ee793bf59e/31712984095bcf59ccf9a1a2619e1a1c19f69891).

### ❌ Example of incorrect code

```js
test('validation works', () => {
    // ...
}, {
    retry: 3,
});
```

### ✅ Example of correct code

```js
test('validation works', {retry: 3}, () => {
    // ...
});
```

## v3-apply-browser-instances

> Both `browser.name` and `browser.providerOptions` will be removed in Vitest 4. Instead of them, use the new `browser.instances` option.
>
> (c) [vitest.dev](https://vitest.dev/guide/migration.html#test-options-as-a-third-argument)

Checkout in 🐊[**Putout Editor**](https://putout.cloudcmd.io/#/gist/1ffbaec363b8094137bb02f561ce2bd2/a3563e8c8ae9b18733d369f5669402e2da59d542).

### ❌ Example of incorrect code

```js
export default defineConfig({
    test: {
        browser: {
            name: 'chromium',
            providerOptions: {
                launch: {
                    devtools: true,
                },
            },
        },
    },
});
```

### ✅ Example of correct code

```js
export default defineConfig({
    test: {
        browser: {
            instances: [{
                name: 'chromium',
                providerOptions: {
                    launch: {
                        devtools: true,
                    },
                },
            }],
        },
    },
});
```

## License

MIT