API testing is a type of software testing that involves testing APIs directly and also as a part of integration testing to check whether the API meets expectations in terms of functionality, reliability, performance, and security of an application. In API Testing our main focus will be on a Business logic layer of the software architecture.

TestNG Introduction: Definition of TestNG as per its documentation is as follows: TestNG is a testing framework designed to simplify a broad range of testing needs, from unit testing to integration testing. Writing a test is typically a three-step process: Write the business logic of your test and insert TestNG annotations in your code. In this post, we've learned what unit testing is and how to set up the unit testing project with xUnit. We've also learned the basic scenarios of testing the controller logic on some CRUD operations. These examples should give you a great starting point for writing your own unit tests, and test the more complex projects. Unit tests for business logic. The remainder of this post will focus on the foundation of the pyramid of testing — unit tests for business logic. These are the majority of tests we expect to have in our project. We will focus on other levels in future posts. Our Redux methodology enforces clear separation between components and business logic. Learn the many benefits of unit testing your software, and how developers can make the testing process easier with guided test creation and automation. before adding business logic to a test Separation of application tasks (input logic, business logic, and UI logic), testability, and test-driven development (TDD) by default. All core contracts in the MVC framework are interface-based and can be tested by using mock objects, which are simulated objects that imitate the behavior of actual objects in the application. Here's an introductory tutorial to using Mockito to mock your methods when it comes to unit testing Akka HTTP Route