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README: Suggest asset mocks #6169

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25 changes: 25 additions & 0 deletions packages/@vue/cli-plugin-unit-jest/README.md
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Expand Up @@ -33,6 +33,31 @@ node --inspect-brk ./node_modules/@vue/cli-service/bin/vue-cli-service.js test:u

Jest can be configured via `jest.config.js` in your project root, or the `jest` field in `package.json`.

### Asset Mocks

If you get a SyntaxError on an asset such as an image or stylesheet, you will need to configure mocks:

**jest.config.js**:

```
"moduleNameMapper": {
"\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/__mocks__/file-mock.js",
"\\.(css|sass)$": "<rootDir>/__mocks__/style-mock.js"
}
```

**/src/__mock__/file-mock.js**:

```js
module.exports = 'test-file-stub'
```

**/src/__mock__/style-mock.js**:

```js
module.exports = {}
```

## Installing in an Already Created Project

```sh
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