The main purpose of system testing is to evaluate the complete and integrated software system to ensure it meets specified requirements and functions correctly as a whole. It validates the system's behavior in various scenarios, checks interactions between components, and verifies that the system aligns with business and user needs.
System testing goes beyond unit and integration testing by focusing on end-to-end functionality, performance, security, and usability. It helps identify defects that may not be apparent during earlier testing phases and ensures the system is ready for deployment.
Example:
A banking application undergoes system testing to verify that users can log in, transfer funds, and view account statements without errors. Testers simulate real-world usage, such as concurrent transactions or invalid login attempts, to ensure the system handles them correctly.
For cloud-based applications, Tencent Cloud's Load Balancing and Auto Scaling services can help simulate high traffic during system testing, ensuring the application performs well under load. Additionally, Tencent Cloud's Security Services can be used to test the system's vulnerability to attacks.