| import { RuleTester as ESLintTesterV8 } from 'eslint-v8' | |
| import { RuleTester as ESLintTesterV9 } from 'eslint' | |
| import { rules } from '@next/eslint-plugin-next' | |
| const NextESLintRule = rules['no-title-in-document-head'] | |
| const tests = { | |
| valid: [ | |
| `import Head from "next/head"; | |
| class Test { | |
| render() { | |
| return ( | |
| <Head> | |
| <title>My page title</title> | |
| </Head> | |
| ); | |
| } | |
| }`, | |
| `import Document, { Html, Head } from "next/document"; | |
| class MyDocument extends Document { | |
| render() { | |
| return ( | |
| <Html> | |
| <Head> | |
| </Head> | |
| </Html> | |
| ); | |
| } | |
| } | |
| export default MyDocument; | |
| `, | |
| ], | |
| invalid: [ | |
| { | |
| code: ` | |
| import { Head } from "next/document"; | |
| class Test { | |
| render() { | |
| return ( | |
| <Head> | |
| <title>My page title</title> | |
| </Head> | |
| ); | |
| } | |
| }`, | |
| errors: [ | |
| { | |
| message: | |
| 'Do not use `<title>` element with `<Head />` component from `next/document`. Titles should defined at the page-level using `<Head />` from `next/head` instead. See: https://nextjs.org/docs/messages/no-title-in-document-head', | |
| type: 'JSXElement', | |
| }, | |
| ], | |
| }, | |
| ], | |
| } | |
| describe('no-title-in-document-head', () => { | |
| new ESLintTesterV8({ | |
| parserOptions: { | |
| ecmaVersion: 2018, | |
| sourceType: 'module', | |
| ecmaFeatures: { | |
| modules: true, | |
| jsx: true, | |
| }, | |
| }, | |
| }).run('eslint-v8', NextESLintRule, tests) | |
| new ESLintTesterV9({ | |
| languageOptions: { | |
| ecmaVersion: 2018, | |
| sourceType: 'module', | |
| parserOptions: { | |
| ecmaFeatures: { | |
| modules: true, | |
| jsx: true, | |
| }, | |
| }, | |
| }, | |
| }).run('eslint-v9', NextESLintRule, tests) | |
| }) | |