System Testing
System testing is a level of software testing where a complete, integrated system is evaluated to verify that it meets specified requirements. It involves testing the entire application as a whole in an environment that closely mimics production, focusing on end-to-end scenarios and user workflows. This type of testing validates the system's compliance with functional, non-functional, and business requirements.
Developers should learn and use system testing to ensure that all components of a software application work together correctly before release, catching integration issues that unit or integration tests might miss. It is crucial for verifying that the system behaves as expected in real-world scenarios, such as user interactions, data flow across modules, and performance under load, which helps reduce post-deployment bugs and improve user satisfaction.