JavaScript/TypeScript Rule Test Structure

Test File Location

Test files for rules are located alongside the rule implementation:

• unit.test.ts - Unit tests using the rule tester
• Test fixtures in packages/analysis/src/jsts/rules/{RULE_ID}/fixtures/ (if applicable)

Test Structure

Tests use the ESLint rule tester pattern with valid and invalid arrays:

import { rule } from './index.js';
import { DefaultParserRuleTester } from '../../../tests/tools/testers/rule-tester.js';
import { describe, it } from 'node:test';