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next.js/test/unit/eslint-plugin-next/no-head-element.test.ts
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first commit
2026-03-10 19:37:31 +03:30

125 lines
2.4 KiB
TypeScript

import { RuleTester } from 'eslint'
import { rules } from '@next/eslint-plugin-next'
const NextESLintRule = rules['no-head-element']
const message =
'Do not use `<head>` element. Use `<Head />` from `next/head` instead. See: https://nextjs.org/docs/messages/no-head-element'
const tests = {
valid: [
{
code: `import Head from 'next/head';
export class MyComponent {
render() {
return (
<div>
<Head>
<title>My page title</title>
</Head>
</div>
);
}
}
`,
filename: 'pages/index.js',
},
{
code: `import Head from 'next/head';
export class MyComponent {
render() {
return (
<div>
<Head>
<title>My page title</title>
</Head>
</div>
);
}
}
`,
filename: 'pages/index.tsx',
},
{
code: `
export default function Layout({ children }) {
return (
<html>
<head>
<title>layout</title>
</head>
<body>{children}</body>
</html>
);
}
`,
filename: './app/layout.js',
},
],
invalid: [
{
code: `
export class MyComponent {
render() {
return (
<div>
<head>
<title>My page title</title>
</head>
</div>
);
}
}`,
filename: './pages/index.js',
errors: [
{
message,
type: 'JSXOpeningElement',
},
],
},
{
code: `import Head from 'next/head';
export class MyComponent {
render() {
return (
<div>
<head>
<title>My page title</title>
</head>
<Head>
<title>My page title</title>
</Head>
</div>
);
}
}`,
filename: 'pages/index.ts',
errors: [
{
message,
type: 'JSXOpeningElement',
},
],
},
],
}
describe('no-head-element', () => {
new RuleTester({
languageOptions: {
ecmaVersion: 2018,
sourceType: 'module',
parserOptions: {
ecmaFeatures: {
modules: true,
jsx: true,
},
},
},
}).run('eslint', NextESLintRule, tests)
})