/** @type {import('ts-jest').JestConfigWithTsJest} */ module.exports = { preset: 'ts-jest', testEnvironment: 'node', maxWorkers: 1, extensionsToTreatAsEsm: ['.ts'], moduleNameMapper: { '^(\\.{1,2}/.*)\\.js$': '$1', }, transform: { // '^.+\\.[tj]sx?$' to process js/ts with `ts-jest` // '^.+\\.m?[tj]sx?$' to process js/ts/mjs/mts with `ts-jest` '^.+\\.tsx?$': [ 'ts-jest', { useESM: true, }, ], }, }