require-hook.md

Pattern: Missing test hook

Issue: -

Description

Test setup and cleanup should be contained within Jest hooks (beforeAll, beforeEach, afterEach, afterAll) rather than being executed directly in the test file or describe block.

Examples

Example of incorrect code:

const setup = () => {
  database.connect();
};

setup(); // Direct call outside hook

describe("tests", () => {
  mockFunction(); // Direct mock setup
  
  test("example", () => {
    expect(database.isConnected()).toBe(true);
  });
});

Example of correct code:

const setup = () => {
  database.connect();
};

beforeAll(() => {
  setup();
});

describe("tests", () => {
  beforeEach(() => {
    mockFunction();
  });
  
  test("example", () => {
    expect(database.isConnected()).toBe(true);
  });
});