How to run Jest tests with Node (express.js) backend and create-react-app as frontend

Question

I have the following folder structure:

Clearly React is using Jest in "Client" node_modules. If i try to install Jest for server node_modules (one lvl up), i will get error from React, saying i have duplicate packages up in the tree. How should i run tests for server with Jest? How should i install Jest for server? Or should i? Or i can use the same Jest react uses in "Client" folder? If so, how? What is the command? Really appreciate your help.

Aprillion · Accepted Answer · 2019-07-14 10:30:45Z

2

2 separate dependency trees, avoiding duplicate packages up in the tree would look like following:

server
  ├──> node_modules
  ├──> index.js
  └──> package.json
client
  ├──> node_modules
  ├──> index.js
  └──> package.json
.gitignore
README.md

edited Jul 14, 2019 at 10:30

answered Apr 19, 2019 at 7:53

Aprillion

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