forked from babel/babel
/
no-undefined-identifier.js
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/
no-undefined-identifier.js
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import rule from "../../lib/rules/no-undefined-identifier.cjs";
import RuleTester from "../../../babel-eslint-shared-fixtures/utils/RuleTester.js";
const error =
"Use path.scope.buildUndefinedNode() to create an undefined identifier directly.";
const ruleTester = new RuleTester({
parserOptions: { sourceType: "module" },
});
ruleTester.run("no-undefined-identifier", rule, {
valid: [
`_.identifier("undefined")`,
`_.Identifier("undefined")`,
`import * as t from "lib"; t.identifier("undefined");`,
`function f(_) { _.types.identifier("undefined"); }`,
`import * as t from "@babel/types"; t.identifier("not_undefined");`,
`path.scope.buildUndefinedNode();`,
],
invalid: [
{
code: `import { identifier } from "@babel/types"; identifier("undefined");`,
errors: [error],
},
{
code: `import { Identifier } from "@babel/types"; Identifier("undefined");`,
errors: [error],
},
{
code: `import * as t from "@babel/types"; t.identifier("undefined");`,
errors: [error],
},
{
code: `import * as t from "@babel/types"; var { identifier } = t; identifier("undefined");`,
errors: [error],
},
{
code: `import { identifier as id } from "@babel/types"; id("undefined");`,
errors: [error],
},
{
code: `import * as babel from "@babel/core"; babel.types.identifier("undefined");`,
errors: [error],
},
{
code: `import { types } from "@babel/core"; types.identifier("undefined");`,
errors: [error],
},
{
code: `import { types as t } from "@babel/core"; t.identifier("undefined");`,
errors: [error],
},
{
code: `export default function plugin(babel) { babel.types.identifier("undefined") }`,
errors: [error],
},
{
code: `export default function plugin({ types }) { types.identifier("undefined") }`,
errors: [error],
},
{
code: `export default function plugin({ types: t }) { t.identifier("undefined") }`,
errors: [error],
},
{
code: `export default ({ types }) => { types.identifier("undefined") }`,
errors: [error],
},
{
code: `module.exports = function plugin({ types }) { types.identifier("undefined") }`,
errors: [error],
},
{
code: `import { declare } from "@babel/helper-plugin-utils"; declare(({ types }) => { types.identifier("undefined") });`,
errors: [error],
},
],
});