module.exports = { preset: 'ts-jest', testEnvironment: 'node', roots: ['/src'], testMatch: ['**/__tests__/**/*.ts', '**/?(*.)+(spec|test).ts'], transform: { '^.+\\.ts$': ['ts-jest', { useESM: true, }], }, collectCoverageFrom: [ 'src/**/*.ts', '!src/**/*.d.ts', ], coverageDirectory: 'coverage', coverageReporters: ['text', 'lcov', 'html'], moduleNameMapper: { '^(\\.{1,2}/.*)\\.js$': '$1', }, extensionsToTreatAsEsm: ['.ts'], };