jest.config.ts

import type { Config } from 'jest';
import nextJest from 'next/jest.js';

const createJestConfig = nextJest({
  // Provide the path to your Next.js app to load next.config.js and .env files in your test environment
  dir: './',
});

// Add any custom config to be passed to Jest
const config: Config = {
  moduleNameMapper: {
    '^d3$': '<rootDir>/node_modules/d3/dist/d3.min.js',
    '^@/(.*)$': '<rootDir>/src/$1'
  },
  // Add more setup options before each test is run
  setupFilesAfterEnv: ['<rootDir>/jest.setup.ts'],
  collectCoverageFrom: ['src/components/**/*.{ts,tsx}', '!**/node_modules/**'],
  testEnvironment: 'jsdom',
  testPathIgnorePatterns: ['/__tests__/helpers.ts'],
};

// createJestConfig is exported this way to ensure that next/jest can load the Next.js config which is async
export default createJestConfig(config);