2021-08-24 14:52:45 +02:00
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import rule from '@next/eslint-plugin-next/lib/rules/no-duplicate-head'
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import { RuleTester } from 'eslint'
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;(RuleTester as any).setDefaultConfig({
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2021-07-15 20:04:17 +02:00
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parserOptions: {
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ecmaVersion: 2018,
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sourceType: 'module',
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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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2021-08-24 14:52:45 +02:00
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const ruleTester = new RuleTester()
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2021-07-15 20:04:17 +02:00
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ruleTester.run('no-duplicate-head', rule, {
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valid: [
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{
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code: `import Document, { Html, Head, Main, NextScript } from 'next/document'
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class MyDocument extends Document {
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static async getInitialProps(ctx) {
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//...
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}
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2022-06-14 04:17:42 +02:00
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2021-07-15 20:04:17 +02:00
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render() {
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return (
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<Html>
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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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2022-06-14 04:17:42 +02:00
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2021-07-15 20:04:17 +02:00
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export default MyDocument
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`,
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filename: 'pages/_document.js',
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},
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{
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code: `import Document, { Html, Head, Main, NextScript } from 'next/document'
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2022-06-14 04:17:42 +02:00
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class MyDocument extends Document {
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2021-07-15 20:04:17 +02:00
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render() {
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return (
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<Html>
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<Head>
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<meta charSet="utf-8" />
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<link
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href="https://fonts.googleapis.com/css2?family=Sarabun:ital,wght@0,400;0,700;1,400;1,700&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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2022-06-14 04:17:42 +02:00
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2021-07-15 20:04:17 +02:00
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export default MyDocument
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`,
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filename: 'pages/_document.tsx',
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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 Document, { Html, Main, NextScript } from 'next/document'
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import Head from 'next/head'
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2022-06-14 04:17:42 +02:00
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2021-07-15 20:04:17 +02:00
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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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<Head />
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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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2022-06-14 04:17:42 +02:00
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2021-07-15 20:04:17 +02:00
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export default MyDocument
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`,
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filename: 'pages/_document.js',
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errors: [
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{
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message:
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2022-06-14 04:17:42 +02:00
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'Do not include multiple instances of `<Head/>`. See: https://nextjs.org/docs/messages/no-duplicate-head',
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2021-07-15 20:04:17 +02:00
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type: 'JSXElement',
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},
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{
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message:
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2022-06-14 04:17:42 +02:00
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'Do not include multiple instances of `<Head/>`. See: https://nextjs.org/docs/messages/no-duplicate-head',
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2021-07-15 20:04:17 +02:00
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type: 'JSXElement',
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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 Document, { Html, Main, NextScript } from 'next/document'
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import Head from 'next/head'
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2022-06-14 04:17:42 +02:00
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2021-07-15 20:04:17 +02:00
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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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<meta charSet="utf-8" />
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<link
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href="https://fonts.googleapis.com/css2?family=Sarabun:ital,wght@0,400;0,700;1,400;1,700&display=swap"
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rel="stylesheet"
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/>
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</Head>
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<body>
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<Main />
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<NextScript />
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</body>
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<Head>
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<script
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dangerouslySetInnerHTML={{
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__html: '',
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}}
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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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2022-06-14 04:17:42 +02:00
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2021-07-15 20:04:17 +02:00
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export default MyDocument
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`,
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filename: 'pages/_document.page.tsx',
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errors: [
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{
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message:
|
2022-06-14 04:17:42 +02:00
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'Do not include multiple instances of `<Head/>`. See: https://nextjs.org/docs/messages/no-duplicate-head',
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2021-07-15 20:04:17 +02:00
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type: 'JSXElement',
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},
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],
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},
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],
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})
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