#no-duplicate-hooks

#Configuration

import { defineConfig, rstestPlugin } from '@rslint/core';

export default defineConfig([
  rstestPlugin.configs.recommended,
  {
    rules: {
      'rstest/no-duplicate-hooks': 'error',
    },
  },
]);

#Rule Details

Disallow registering the same Rstest lifecycle hook more than once in the same lexical suite scope. Duplicate beforeAll, beforeEach, afterEach, or afterAll registrations can repeat setup or cleanup and make test organization harder to understand. The second and every later registration of the same hook is reported.

The file-level root and each describe call have independent counters. This includes modified and parameterized suites such as describe.skip, describe.runIf, describe.each, and describe.for. The rule follows lexical nesting in the source; it does not execute callbacks or helpers.

The rule recognizes Rstest globals; named, renamed, namespace, and CommonJS imports from @rstest/core, rstack/test, and @rstest/playwright; import.meta.rstest; stable local aliases; and Playwright test.beforeEach-style hooks. Foreign imports, locally shadowed names, dynamic computed members, and invalid hook chains are ignored. Type information is not required. See the Rstest hooks documentation for lifecycle execution details.

#Incorrect

import { beforeEach, describe } from '@rstest/core';

describe('shopping cart', () => {
  beforeEach(() => resetCart());
  beforeEach(() => seedProducts());
});

#Correct

import { beforeEach, describe } from '@rstest/core';

describe('shopping cart', () => {
  beforeEach(() => {
    resetCart();
    seedProducts();
  });
});