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Using Postman for API Testing

Postman is a powerful tool for testing, documenting, and automating RESTful APIs. It’s widely used by backend developers, testers, and DevOps teams to validate APIs quickly and collaborate across environments.

Key features of Postman:

  • Send HTTP requests (GET, POST, PUT, DELETE).
  • Test APIs with JSON, form data, or raw body inputs.
  • Save requests in collections for reuse and sharing.
  • Write tests using JavaScript to automate validations.
  • Manage environments with variable support.

Example workflow:

  1. Open Postman and create a new request.
  2. Set method and URL (e.g., GET https://api.example.com/users).
  3. Add headers (e.g., Authorization: Bearer token).
  4. Send the request and inspect the response.
  5. Add tests in the “Tests” tab to assert behavior.
javascriptКопироватьРедактироватьpm.test("Status code is 200", function () {
    pm.response.to.have.status(200);
});

Advanced uses:

  • Chain multiple requests in workflows.
  • Generate and publish API documentation.
  • Run automated tests with Newman (Postman’s CLI).

Postman simplifies API development and testing, reducing guesswork and ensuring consistent behavior. It’s an essential tool for anyone working with web services.