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/**
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 * Tests for custom ESLint rules.
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 */
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import { RuleTester } from 'eslint';
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import { describe, it } from 'node:test';
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import { noExportDefaultOfImportStar } from './custom-eslint-rules.mjs';
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// Create a new RuleTester instance
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const ruleTester = new RuleTester({
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  languageOptions: {
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    ecmaVersion: 2022,
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    sourceType: 'module',
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  },
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});
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describe('no-export-default-of-import-star', () => {
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  it('should validate the rule', () => {
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    ruleTester.run('no-export-default-of-import-star', noExportDefaultOfImportStar, {
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      valid: [
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        // Valid: Regular named import
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        {
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          code: `
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            import { foo } from 'some-module';
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            export default foo;
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          `,
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        },
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        // Valid: Inline default export
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        {
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          code: `
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            export default { foo: 'bar' };
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          `,
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        },
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        // Valid: Export namespace import as named export
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        {
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          code: `
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            import * as foo from 'some-module';
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            export { foo };
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          `,
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        },
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        // Valid: Namespace import used for something other than export default
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        {
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          code: `
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            import * as foo from 'some-module';
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            const bar = foo;
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          `,
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        },
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        // Valid: Export default with non-identifier
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        {
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          code: `
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            import * as foo from 'some-module';
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            export default foo.bar;
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          `,
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        },
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        // Valid: Re-export all
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        {
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          code: `
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            export * from 'some-module';
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          `,
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        },
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        // Valid: Named imports with object literal default export
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        {
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          code: `
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            import { var1, var2 } from 'some-module';
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            export * from 'some-module';
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            export default { var1, var2 };
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          `,
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        },
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      ],
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      invalid: [
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        // Invalid: Export namespace import as default
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        {
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          code: `
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            import * as foo from 'some-module';
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            export default foo;
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          `,
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          errors: [
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            {
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              messageId: 'noExportDefaultOfImportStar',
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              data: { source: 'some-module' },
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            },
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          ],
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        },
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        // Invalid: Common pattern with _default
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        {
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          code: `
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            import * as _default from 'some-module';
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            export default _default;
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          `,
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          errors: [
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            {
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              messageId: 'noExportDefaultOfImportStar',
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              data: { source: 'some-module' },
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            },
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          ],
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        },
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        // Invalid: Namespace import with scoped package
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        {
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          code: `
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            import * as myModule from '@scope/package';
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            export default myModule;
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          `,
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          errors: [
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            {
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              messageId: 'noExportDefaultOfImportStar',
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              data: { source: '@scope/package' },
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            },
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          ],
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        },
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        // Invalid: Multiple imports, only one violates rule
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        {
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          code: `
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            import { named } from 'module1';
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            import * as ns from 'module2';
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            export default ns;
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          `,
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          errors: [
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            {
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              messageId: 'noExportDefaultOfImportStar',
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              data: { source: 'module2' },
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            },
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          ],
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        },
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      ],
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    });
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  });
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});