| import { RuleTester as ESLintTesterV8 } from 'eslint-v8' |
| import { RuleTester as ESLintTesterV9 } from 'eslint' |
| import { rules } from '@next/eslint-plugin-next' |
|
|
| const NextESLintRule = rules['google-font-display'] |
|
|
| const tests = { |
| valid: [ |
| `import Head from "next/head"; |
| |
| export default Test = () => { |
| return ( |
| <Head> |
| <link href={test} rel="test" /> |
| <link |
| href={process.env.NEXT_PUBLIC_CANONICAL_URL} |
| rel="canonical" |
| /> |
| <link |
| href={new URL("../public/favicon.ico", import.meta.url).toString()} |
| rel="icon" |
| /> |
| <link |
| href="https://fonts.googleapis.com/css2?family=Krona+One&display=optional" |
| rel="stylesheet" |
| /> |
| </Head> |
| ); |
| }; |
| `, |
|
|
| `import Document, { Html, Head } from "next/document"; |
| |
| class MyDocument extends Document { |
| render() { |
| return ( |
| <Html> |
| <Head> |
| <link |
| href="https://fonts.googleapis.com/css?family=Krona+One&display=swap" |
| rel="stylesheet" |
| /> |
| </Head> |
| </Html> |
| ); |
| } |
| } |
| |
| export default MyDocument; |
| `, |
|
|
| `import Document, { Html, Head } from "next/document"; |
| |
| class MyDocument extends Document { |
| render() { |
| return ( |
| <Html> |
| <Head> |
| <link |
| href="https://fonts.googleapis.com/css?family=Krona+One&display=swap" |
| rel="stylesheet" |
| crossOrigin="" |
| /> |
| </Head> |
| </Html> |
| ); |
| } |
| } |
| |
| export default MyDocument; |
| `, |
| ], |
|
|
| invalid: [ |
| { |
| code: `import Head from "next/head"; |
| |
| export default Test = () => { |
| return ( |
| <Head> |
| <link |
| href="https://fonts.googleapis.com/css2?family=Krona+One" |
| rel="stylesheet" |
| /> |
| </Head> |
| ); |
| }; |
| `, |
| errors: [ |
| { |
| message: |
| 'A font-display parameter is missing (adding `&display=optional` is recommended). See: https://nextjs.org/docs/messages/google-font-display', |
| type: 'JSXOpeningElement', |
| }, |
| ], |
| }, |
| { |
| code: `import Head from "next/head"; |
| |
| export default Test = () => { |
| return ( |
| <Head> |
| <link |
| href="https://fonts.googleapis.com/css2?family=Krona+One&display=block" |
| rel="stylesheet" |
| /> |
| </Head> |
| ); |
| }; |
| `, |
| errors: [ |
| { |
| message: |
| 'Block is not recommended. See: https://nextjs.org/docs/messages/google-font-display', |
| type: 'JSXOpeningElement', |
| }, |
| ], |
| }, |
| { |
| code: `import Head from "next/head"; |
| |
| export default Test = () => { |
| return ( |
| <Head> |
| <link |
| href="https://fonts.googleapis.com/css2?family=Krona+One&display=auto" |
| rel="stylesheet" |
| /> |
| </Head> |
| ); |
| }; |
| `, |
| errors: [ |
| { |
| message: |
| 'Auto is not recommended. See: https://nextjs.org/docs/messages/google-font-display', |
| type: 'JSXOpeningElement', |
| }, |
| ], |
| }, |
| { |
| code: `import Head from "next/head"; |
| |
| export default Test = () => { |
| return ( |
| <Head> |
| <link |
| href="https://fonts.googleapis.com/css2?display=fallback&family=Krona+One" |
| rel="stylesheet" |
| /> |
| </Head> |
| ); |
| }; |
| `, |
| errors: [ |
| { |
| message: |
| 'Fallback is not recommended. See: https://nextjs.org/docs/messages/google-font-display', |
| type: 'JSXOpeningElement', |
| }, |
| ], |
| }, |
| ], |
| } |
|
|
| describe('google-font-display', () => { |
| new ESLintTesterV8({ |
| parserOptions: { |
| ecmaVersion: 2020, |
| sourceType: 'module', |
| ecmaFeatures: { |
| modules: true, |
| jsx: true, |
| }, |
| }, |
| }).run('eslint-v8', NextESLintRule, tests) |
|
|
| new ESLintTesterV9({ |
| languageOptions: { |
| ecmaVersion: 2020, |
| sourceType: 'module', |
| parserOptions: { |
| ecmaFeatures: { |
| modules: true, |
| jsx: true, |
| }, |
| }, |
| }, |
| }).run('eslint-v9', NextESLintRule, tests) |
| }) |
|
|
