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 (
);
};
`,
`import Document, { Html, Head } from "next/document";
class MyDocument extends Document {
render() {
return (
);
}
}
export default MyDocument;
`,
`import Document, { Html, Head } from "next/document";
class MyDocument extends Document {
render() {
return (
);
}
}
export default MyDocument;
`,
],
invalid: [
{
code: `import Head from "next/head";
export default Test = () => {
return (
);
};
`,
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 (
);
};
`,
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 (
);
};
`,
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 (
);
};
`,
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)
})