Outsource QA: Сomponent Testing vs. System Testing
Any system is developed piecemeal, as a set of processes or modules. As a matter of fact, it also can be tested piece by piece, not necessarily as a whole system. It is allowed to test individual components of a system and then their interaction. It is a so-called bottom-up approach to integrated testing during which the lowest level components are tested first and after this they are involved in testing of higher level components, to facilitate this process. It is reasonable to outsource qa so that to contribute to market success of software applications under development.
After making sure that some elements of the program are functionally correct, a specialist sets out to test interaction between them. And it may turn out that they cannot work together because of their incompatibility with each other. For example, if a programmer accidentally swaps the parameters of a called function, an error is sure to occur while performing the function call. And it will be identified only while running the two functions – the calling and called ones – in sync.
Process of checking the interaction between software modules is called as integration testing. In this testing, the modules are paired, then combined into large blocks, and later all the modules are combined to form an integrated system.
Please, be informed that software testing service providers tirelessly work so that each testing process can be completed successfully.
Bottom-up testing is a great way to locate software defects. If an error is detected during testing of a single module, it is obvious that it is present in this module, and can be found without examining all of the system’s code. And if the error occurs during interaction of the two, already tested modules, then the cause of this problem lies in their interface. Another benefit of bottom-up testing is that the programmer running it focuses on the very small area (a single module, the data transfer between a pair of modules, etc.). Due to this, the testing is done more thoroughly and is more likely to find defects.
Top testing companies are the best providers of demandable qa services and it is no secret that they have millions of clients all over the globe. Are you eager to satisfy your customers with exceptional quality software? The companies will do their best to help you achieve this goal. Be proud of what you develop.