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207 lines
4.6 KiB
TypeScript
207 lines
4.6 KiB
TypeScript
import { RuleTester } from 'eslint'
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import { rules } from '@next/eslint-plugin-next'
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const NextESLintRule = rules['no-page-custom-font']
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const filename = 'pages/_document.js'
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const tests = {
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valid: [
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{
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code: `import Document, { Html, Head } from "next/document";
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class MyDocument extends Document {
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render() {
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return (
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<Html>
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<Head>
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<link
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href="https://fonts.googleapis.com/css2?family=Krona+One&display=swap"
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rel="stylesheet"
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/>
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</Head>
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</Html>
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);
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}
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}
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export default MyDocument;`,
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filename,
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},
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{
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code: `import NextDocument, { Html, Head } from "next/document";
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class Document extends NextDocument {
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render() {
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return (
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<Html>
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<Head>
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<link
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href="https://fonts.googleapis.com/css2?family=Krona+One&display=swap"
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rel="stylesheet"
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/>
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</Head>
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</Html>
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);
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}
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}
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export default Document;
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`,
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filename,
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},
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{
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code: `export default function CustomDocument() {
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return (
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<Html>
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<Head>
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<link
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href="https://fonts.googleapis.com/css2?family=Krona+One&display=swap"
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rel="stylesheet"
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/>
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</Head>
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</Html>
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)
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}`,
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filename,
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},
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{
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code: `function CustomDocument() {
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return (
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<Html>
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<Head>
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<link
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href="https://fonts.googleapis.com/css2?family=Krona+One&display=swap"
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rel="stylesheet"
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/>
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</Head>
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</Html>
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)
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}
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export default CustomDocument;
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`,
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filename,
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},
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{
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code: `
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import Document, { Html, Head } from "next/document";
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class MyDocument {
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render() {
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return (
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<Html>
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<Head>
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<link
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href="https://fonts.googleapis.com/css2?family=Krona+One&display=swap"
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rel="stylesheet"
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/>
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</Head>
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</Html>
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);
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}
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}
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export default MyDocument;`,
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filename,
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},
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{
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code: `export default function() {
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return (
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<Html>
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<Head>
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<link
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href="https://fonts.googleapis.com/css2?family=Krona+One&display=swap"
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rel="stylesheet"
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/>
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</Head>
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</Html>
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)
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}`,
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filename,
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},
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],
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invalid: [
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{
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code: `
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import Head from 'next/head'
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export default function IndexPage() {
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return (
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<div>
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<Head>
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<link
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href="https://fonts.googleapis.com/css2?family=Inter"
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rel="stylesheet"
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/>
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</Head>
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<p>Hello world!</p>
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</div>
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)
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}
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`,
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filename: 'pages/index.tsx',
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errors: [
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{
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message:
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'Custom fonts not added in `pages/_document.js` will only load for a single page. This is discouraged. See: https://nextjs.org/docs/messages/no-page-custom-font',
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type: 'JSXOpeningElement',
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},
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],
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},
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{
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code: `
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import Head from 'next/head'
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function Links() {
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return (
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<>
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<link
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href="https://fonts.googleapis.com/css2?family=Inter"
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rel="stylesheet"
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/>
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<link
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href="https://fonts.googleapis.com/css2?family=Open+Sans"
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rel="stylesheet"
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/>
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</>
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)
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}
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export default function IndexPage() {
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return (
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<div>
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<Head>
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<Links />
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</Head>
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<p>Hello world!</p>
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</div>
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)
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}
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`,
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filename,
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errors: [
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{
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message:
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'Using `<link />` outside of `<Head>` will disable automatic font optimization. This is discouraged. See: https://nextjs.org/docs/messages/no-page-custom-font',
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},
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{
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message:
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'Using `<link />` outside of `<Head>` will disable automatic font optimization. This is discouraged. See: https://nextjs.org/docs/messages/no-page-custom-font',
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},
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],
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},
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],
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}
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describe('no-page-custom-font', () => {
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new RuleTester({
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languageOptions: {
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ecmaVersion: 2018,
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sourceType: 'module',
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parserOptions: {
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ecmaFeatures: {
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modules: true,
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jsx: true,
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},
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},
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},
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}).run('eslint', NextESLintRule, tests)
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})
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