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I will add jest tests to your node js or typescript project
About this Gig
Need reliable automated tests before a release, refactor, or handoff?
I will add clear, maintainable Jest or Vitest tests to your Node.js or TypeScript project. I can cover backend services, REST APIs, business logic, React utilities, database-facing code, and common failure paths.
You will receive tests that run in your existing project, not a generic report. Depending on the package, I can add unit tests, Supertest API integration tests, mocks and fixtures, coverage configuration, and a GitHub Actions test workflow.
I follow the repository's existing style. Every delivery includes the source changes and simple instructions for running the tests.
Supported stack: Node.js, TypeScript, JavaScript, Jest, Vitest, Supertest, Express, React, PostgreSQL, and Docker.
Please message me before ordering if the project is a large monorepo, requires paid external services, has no working local setup, or needs browser E2E, load, or security testing. I will review the scope and recommend the right package.
Testing application:
API
Development technology:
JavaScript
•
Node.js
•
React
•
SQL
•
TypeScript
Device:
PC
•
Mac
•
Linux
My Portfolio
FAQ
What do you need before starting?
Repository access or a source archive, install and test commands, the target modules, and expected behavior. Never send production secrets.
Can you test an existing REST API?
Yes. I can add Jest or Vitest and Supertest integration tests for success cases, validation errors, authentication flows, and mocked external services.
