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SuperTest

Open Source

HTTP assertion library for testing Node.js HTTP servers with a chainable, expressive API.

Visit websiteGitHub

Pricing

Free / Open source

Type

Automation

Languages

JavaScript, TypeScript

// VERDICT

Reach for SuperTest when you want to test a Node.js HTTP API in code, inside your existing JS test runner. Skip it when your stack isn't JS/Node or you want a GUI-based API client.

Best for

Asserting on HTTP endpoints from JavaScript/TypeScript tests, especially Node.js apps, by driving requests inside your test runner.

Avoid when

You're not testing a Node/JS HTTP app, or you want a GUI client or a non-JS language.

CI/CD fit

Jest · Mocha · GitHub Actions · GitLab CI · npm

Languages

JavaScript · TypeScript

Team fit

Node.js teams · JavaScript/TypeScript teams · Backend SDET teams

Setup

Easy

Maintenance

Low

Learning

Beginner

Licence

Free / Open source

// BEST FOR

  • Testing Node.js/Express-style HTTP APIs directly in code
  • Running API assertions inside an existing Jest or Mocha suite
  • Testing an app in-process without a separately running server
  • Fast, developer-owned API tests versioned with the app
  • A fluent request/assertion chain familiar to JS developers
  • Combining API checks with the rest of a JS unit/integration suite

// AVOID WHEN

  • Your application or stack isn't JavaScript/Node
  • You want a GUI client for exploring APIs
  • Non-developers need to author or run the tests
  • You need code-based tests in another language (REST Assured for Java)
  • Cross-language contract testing is the goal (Pact)
  • You want a standalone tool decoupled from a JS test runner

// QUICK START

npm install --save-dev supertest
# in a Jest/Mocha test: request(app).get('/health').expect(200)

// ALTERNATIVES TO CONSIDER

ToolChoose it when
REST AssuredYou want code-based API tests in Java rather than JS.
PostmanYou want a GUI client with saved collections.
PlaywrightYou want one tool for API plus browser E2E in JS/TS.

// FEATURES

  • Chainable HTTP request builder built on superagent
  • Pass an Express/Koa/Fastify app directly — no listening port required
  • Built-in assertions for status, headers, and body
  • Cookie and session handling for authenticated flows
  • Pairs naturally with Mocha, Jest, Vitest, and Tap

// PROS

  • Most popular API testing library in the Node ecosystem
  • Zero-port testing speeds up integration tests
  • Tiny API surface — fast to learn
  • Stable across many years and Node versions

// CONS

  • Limited helpers compared to Karate or REST-assured
  • Built on superagent, which has its own quirks
  • No built-in test data or mocking utilities

// EXAMPLE QA WORKFLOW

  1. Add SuperTest to dev dependencies

  2. Import it into your Jest/Mocha tests, passing the app

  3. Write request/assertion chains against endpoints

  4. Reuse helpers for auth and common setup

  5. Seed test data via API or fixtures

  6. Run as part of the normal JS test step in CI

// RELATED QA.CODES RESOURCES