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/** * Tests for the no-reexports ESLint rule */ const { RuleTester } = require('eslint'); const noReexportsRule = require('../no-reexports'); // Use ESLint v9+ flat config format const ruleTester = new RuleTester({ languageOptions: { ecmaVersion: 2020, sourceType: 'module', } }); ruleTester.run('no-reexports', noReexportsRule, { valid: [ // Original exports, not re-exports "export const foo = 'bar';", "export function doSomething() { return true; }", // Not re-exporting imported items "import { thing } from './module'; export const otherThing = 'value';", // Allowed via options.allowList { code: "import { thing } from './module'; export { thing };", options: [{ allowList: ['thing'] }] }, // Allowed via options.allowModules { code: "import { thing } from './allowed-module'; export { thing };", options: [{ allowModules: ['./allowed-module'] }] }, // Allowed renamed exports when allowRenamed is true { code: "import { thing } from './module'; export { thing as renamedThing };", options: [{ allowRenamed: true }] } ], invalid: [ // Basic re-export case { code: "import { thing } from './module'; export { thing };", errors: [{ message: "Passthrough export of 'thing' from './module' is not allowed. Modules should add value, not just re-export. Remove this re-export and update affected imports to use './module' directly." }] }, // Re-export with renaming { code: "import { thing } from './module'; export { thing as otherThing };", errors: [{ message: "Passthrough export of 'thing' from './module' is not allowed. Modules should add value, not just re-export. Remove this re-export and update affected imports to use './module' directly." }] }, // Re-export via variable { code: "import { thing } from './module'; const reExport = thing; export { reExport };", errors: [{ message: "Passthrough export of 'reExport' which wraps an import from './module' is not allowed. Remove this variable and re-export pattern and update imports to reference './module' directly." }] }, // Direct re-export syntax { code: "export { thing } from './module';", errors: [{ message: "Passthrough export from './module' is not allowed. Passthrough files add complexity without value. Remove this re-export and import directly from './module' where needed." }] }, // Export all { code: "export * from './module';", errors: [{ message: "Exporting all from './module' is not allowed. This creates hard-to-track dependencies. Import and export specific items with added value, or update affected imports to use './module' directly." }] }, // Default export re-export { code: "import thing from './module'; export default thing;", errors: [{ message: "Passthrough default export of 'thing' from './module' is not allowed. Default exports should provide value, not just re-export. Remove this file or add functionality before exporting." }] }, // Variable declaration export { code: "import { thing } from './module'; export const exportedThing = thing;", errors: [{ message: "Passthrough export of 'thing' from './module' via variable declaration is not allowed. Add meaningful transformation or remove this pattern entirely. Update affected imports to use './module' directly." }] } ] });