NAPI-RS with Jest ENV Vars Reproduction

This issue seems to arise from this part of the jest code.

Jest is mocking the process, which means that any changes to the env in a jest test environment (using something like process.env.TEST="fff") will not get propagated to the actual process environment variables. Thus the rust side never receives them.

Relevant Files

• env-test.js Shows that envs are propagated correctly when just using Node
• env.test.ts Shows the issue with jest
• patchJest.ts The Monkey Patch we are currently using

Requirements

• latest Rust
• NodeJS@10+ which fully supported N-API
• [email protected]

How to Reproduce

git clone https://github.com/williamluke4/napi-jest-repoduction
cd napi-jest-repoduction
yarn build 
# This will fail
jest  
# This will now work after the patch
ts-node ./patchJest.ts && jest
# This will also pass as it is not jest 
node ./env-test.js
# You can also revert the patch using 
ts-node ./patchJest.ts unpatch