API Integration Testing with Java and TestNG

In modern software development, ensuring that your backend services communicate flawlessly is critical. This text-based course guides you through the process of automating REST API integration tests using Java, RestAssured, and TestNG. You will start by understanding core HTTP concepts and the foundations of API architecture before writing your first test script. Through detailed explanations and written code examples, you will learn how to verify data, manage HTTP methods, and handle API authentication securely. What you'll learn: Understand foundational REST API concepts, HTTP methods, status codes, and JSON payloads. Configure a clean Java testing environment using Maven, RestAssured, and TestNG. Create automated test cases to validate GET, POST, PUT, and DELETE operations. Parse and assert JSON response bodies and headers to verify data integrity. Organize and run structured test suites with TestNG assertions and annotations. Apply modern practices like environment-based configuration and basic token-based authentication. This course begins with essential terminology and setup instructions, moving systematically into practical test scenarios and structured assertions. It is designed specifically for beginners, manual testers, and developers looking to transition into automated API testing with no prior automation experience required. Start building reliable, automated API tests today.