Understanding Software Testing

It is not possible to guarantee that all software works correctly, without the presence of bugs, since many systems have a large number of states with complex activities and algorithms.

Software testing began to gain strength in the 1990s when companies matured and started thinking about reducing support costs and rework. The main quality attributes of software are divided into Functionality, Reliability, Usability, Efficiency, Maintainability, and Portability.

Testing Phases

Software Testing phases are divided into 4 stages:

Unit Testing

It is the lowest stage in the testing scale and is applied to the smallest code components created. It uses white-box testing techniques for execution and is normally performed by the programmer themselves.

Integration Testing

It is the process of verifying the interaction between components. For this phase to be executed, the modules must have already passed unit tests.

System Testing

At this stage, the software is tested in its entirety. The tests applied are black-box type. In this phase, compliance with requirements is verified, simulating a real production environment.

Acceptance Testing

Also called Alpha and Beta testing, these are performed to allow the end user to validate all requirements. In this phase, the client confirms whether all their needs have been met by the system.

Conclusion

Failures can originate from various reasons, which is why testing becomes increasingly important and essential for developing high-quality software and ensuring operational peace of mind.