chess/tests/setup.js

/**
 * Jest Test Setup
 * Runs before each test file
 */

import '@testing-library/jest-dom';

// Mock localStorage
const localStorageMock = {
  getItem: jest.fn(),
  setItem: jest.fn(),
  removeItem: jest.fn(),
  clear: jest.fn(),
};
global.localStorage = localStorageMock;

// Mock console methods in tests to reduce noise
global.console = {
  ...console,
  error: jest.fn(),
  warn: jest.fn(),
};

// Custom matchers
expect.extend({
  toBeValidChessPosition(received) {
    const isValid =
      received.row >= 0 &&
      received.row < 8 &&
      received.col >= 0 &&
      received.col < 8;

    if (isValid) {
      return {
        message: () => `expected ${JSON.stringify(received)} not to be a valid chess position`,
        pass: true
      };
    } else {
      return {
        message: () => `expected ${JSON.stringify(received)} to be a valid chess position`,
        pass: false
      };
    }
  },

  toBeValidFEN(received) {
    const fenRegex = /^([rnbqkpRNBQKP1-8]+\/){7}[rnbqkpRNBQKP1-8]+ [wb] [KQkq-]+ [a-h][1-8]|- \d+ \d+$/;
    const isValid = typeof received === 'string' && fenRegex.test(received);

    if (isValid) {
      return {
        message: () => `expected "${received}" not to be valid FEN`,
        pass: true
      };
    } else {
      return {
        message: () => `expected "${received}" to be valid FEN`,
        pass: false
      };
    }
  }
});

// Reset mocks before each test
beforeEach(() => {
  localStorageMock.getItem.mockClear();
  localStorageMock.setItem.mockClear();
  localStorageMock.removeItem.mockClear();
  localStorageMock.clear.mockClear();
});