What Should We Know About System Testing
A set of completed and debugged tests can be run during the next stage of the waterfall testing process, i.e. at the system test level. System testing involves verifying whether the software functions in the way the user expects it to. The system testing is divided into two main types: performance testing and functional testing.
Functional testing is a black box technique that does not require any knowledge about the structure of the software product, but at the same time it is a specification based verification process which checks the systems against its functional requirements. Therefore, the tester must have a firm grasp of the functional specifications of the particular functional component of the system. It uses a set of tests to conclude that the system behaves in accordance with its design specification and works based on client expectations.
If testing has confirmed that the basic functionality of the system operates correctly, the functional test task is to check whether the system performs its functions as intended.
Performance testing consists of the following activities: stress testing, load testing, volume testing, timing testing. Availability, maintenance, reliability tests can also be also run as a part of performance testing. If you feel like executing successful tests on your digital products you are strongly recommended to use offshore software testing. You will be able to deal highly skilled specialists who will do your work competently.
Apart from functional testing and performance testing, it may be necessary to carry out a variety of additional checks during the system testing phase. These can include security testing, installation testing, capacity testing, compatibility testing, usability testing and extensibility testing.
System testing should start only if:
- Unit and integration tests have been successfully completed;
- Specification-based software development has been successfully completed;
- An appropriate system test environment has been constructed.
This stage involves testing the behavioral aspects, system design and the system’s compliance with the user expectations.
Usually we use two approaches:
- requirement based approach, when test cases are written for each individual requirement;
- use case-based approach, when you perform use cases or scripts to verify the system’s behavior.