API testing and API gateway

API testing is crucial for ensuring the reliability and correctness of microservices. An API Gateway is a central component in a microservices architecture, providing a unified entry point for managing and securing APIs.

API testing

API testing is the process of confirming that an API is working as expected. Developers can run API tests manually, or they can automate them with an API testing tool. There are several types of API tests, and each one plays a distinct role in ensuring that the API remains reliable:

• Unit testing: In unit testing, we test individual units of code (functions, modules) in isolation. Requirements and examples are as follows:
  • Tools: Testing frameworks such as Jest, Mocha, or Jasmine.
  • Example (using Jest):

    test('adds 1 + 2 to equal 3', () => {

      expect(sum(1, 2)).toBe(3);

    });

• Integration testing: Through integration testing, we verify the interaction between different components or services. Requirements...