src/setupTests.js

// jest-dom adds custom jest matchers for asserting on DOM nodes.
// allows you to do things like:
// expect(element).toHaveTextContent(/react/i)
// learn more: https://github.com/testing-library/jest-dom
import '@testing-library/jest-dom';

// 模拟 localStorage
const localStorageMock = (function() {
    let store = {};
    return {
      getItem: jest.fn((key) => store[key] || null),
      setItem: jest.fn((key, value) => {
        store[key] = String(value);
      }),
      removeItem: jest.fn((key) => {
        delete store[key];
      }),
      clear: jest.fn(() => {
        store = {};
      })
    };
  })();
  
  // 挂载到全局
  Object.defineProperty(window, 'localStorage', {
    value: localStorageMock,
    writable: true // 必须设置为可写
  });