jest.config.js

/** @type {import('jest').Config} */
export default {
    preset: 'ts-jest/presets/default-esm',
    extensionsToTreatAsEsm: ['.ts'],
    testEnvironment: 'jsdom', // Use 'jsdom' for DOM testing, 'node' for Node.js only
    roots: ['<rootDir>/src', '<rootDir>/tests'],
    testMatch: [
        '**/__tests__/**/*.ts',
        '**/?(*.)+(spec|test).ts'
    ],
    transform: {
        '^.+\\.ts$': ['ts-jest', {
            useESM: true
        }]
    },
    collectCoverageFrom: [
        'src/**/*.ts',
        '!src/**/*.d.ts'
    ],
    coverageDirectory: 'coverage',
    coverageReporters: ['text', 'lcov', 'html'],
    setupFilesAfterEnv: ['<rootDir>/tests/setup.ts'] // Optional: for custom test setup
};