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Explanation

SIT stands for System Integration Testing. It is a testing phase where multiple modules or services of an application are combined and tested together to ensure they work correctly as a complete system.

Code:

Frontend + Backend + Database ->
 Tested Together

Explanation

The main goal of SIT is to identify issues in the interaction between integrated components such as APIs, databases, authentication systems, and external services.

Code:

User Login -> API Call -> 
Database Validation -> Response

Explanation

SIT is usually performed after Unit Testing and before User Acceptance Testing (UAT).

Code:

Unit Testing -> SIT -> UAT -> Production

Explanation

Example: In an e-commerce application, SIT checks whether the payment service, order service, and inventory service work together properly.

Code:

Place Order -> Payment Success -> 
Inventory Updated -> Order Confirmed

Explanation

SIT can be done manually or using automation testing tools.

Code:

Tools: Selenium, Postman, JUnit, TestNG

Explanation

Common issues found during SIT include API failures, incorrect data flow, authentication problems, and database integration errors.

Code:

HTTP 500 Error while calling payment API