About Testing
In the overall process of hardware and software development in computer, testing is used at key checkpoints to determine whether objectives are being met. In brief we can say testing is a process of executing a program with intent of finding the software bugs. When the design is complete, coding follows and the finished code is then tested at the unit or module level by each programmer; at the component level by the group of programmers involved; and at the system level when all components are combined together.
Levels of Testing In Software Engineering:
- Unit Testing, involves testing individual modules or pieces of code to make sure eachpart or “unit” is correct. A “unit” can be a specific piece of functionality, a program, ora particular procedure within the application. Unit testing helps verify internal designand internal logic, internal paths, as well as error handling.
- Integration testing, after unit testing, tests how the units work together. Individual components are combined and tested as a group to check the output. Integration testingensures your application runs efficiently. It identifies interface issues between modules.
- System testing evaluates how system behaves under unfavourable conditions. Testing is conducted at beyond limits of the specifications. This level of testing is actually a seriesof tests whose purpose is to test the application end-to- end. System testing isparticularly important because it verifies the technical, functional, and businessrequirements of the software.
- Acceptance testing determines whether or not the software is ready to be released at theend of the whole process which is performed by the business user or the end-user.
