Software Testing is a very interesting aspect of software development. It baffles the mind to realize how many scenarios need to be tested before the application is finally ready for launch. The list of testing techniques is vast and helps in the accomplishment of a flawlessly working product. This article throws light on a software testing technique which is known as System Integration Testing.
System Integration testing is a high-level, black-box testing process that evaluates the performance of all related systems and sub-systems. It checks the interaction and execution of commands between the various components of each system. The idea is to create a seamless and an error-free exchange of data.
The prime aim of System Integration Testing is data integrity. Data integrity has to be maintained at all costs. There is no excuse for not being able to maintain it between the modules or parts of any system. Apart from that, it also checks the dependency of one system on the other.
Once each system has successfully passed through system testing, it is time to integrate it. It is mostly during System Integration Testing that the entire system has been put together for the first time. The application is now seen as a whole instead of parts and parcels. This type of testing requires smooth coordination between all interrelated systems as well as their lesser known parts. The integration of any system takes place by verifying the flow of information between its components.
The main features of System Integration Testing are as discussed below:
Once the whole system or application has been put together it is mandatory to check whether the flow of data is as expected. Any deviation from the expected standard is an indication of errors in integration. System Integration can occur in any one of the following manners - bottom-up, top-down, sandwich or big-bang. In either case, the end result of testing still remains unchanged. System Integration Testing is crucial to maintaining and validating data honesty and uprightness as well as the unrestricted flow of data.