E2E GraphQL Testing with Supertest & Jest

I have used many testing frameworks over the years: Mocha, Sinon.js, Chai, Supertest, Jest etc. but at the end I settled to the Jest-Supertest combination.

Setup Server

Server.ts

Configure Jest

1. Install jest dependencies: npm i -D jest @types/jest ts-jest

2. Create jest configuration file.

3. Add test script to the package.json file.

--runInBand: Running test synchronously.

--testTimeout 60000: Increase timeout duration to enable server start and close in time.

--detectOpenHandles: Use this flag to check if anything left open after the tests are finished.

Test