Jest sets the following environment variables:
NODE_ENV
Set to 'test'
if it's not already set to something else.
JEST_WORKER_ID
Each worker process is assigned a unique id (index-based that starts with 1
). This is set to 1
for all tests when runInBand
is set to true.
© 2020 Facebook, Inc.
Licensed under the MIT License.
https://jestjs.io/docs/en/environment-variables