Skip to main content


Jest preset for unit-testing


Install package:

npm i --save-dev @tramvai/test-unit-jest

Add new preset to your jest.config:

module.exports = {
preset: '@tramvai/test-unit-jest',


This presets implements next settings:

  • use jest-circus as testRunner
  • default testEnvironment is node
  • uses @swc-node/jest for transformation
  • css files are mapped with identity-obj-proxy
  • image files are mapped to empty string

How To

Override testEnvironment for file

Based on jest doc

Just add at the start of test file following comment:

* @jest-environment your-environment