End to end testing is a major type of testing where entire software is tested from start to end. All the functionalities within the software, their interfaces, external interfaces, interaction between the different servers & systems are tested in the environment similar to real time.
End to end testing confirms that the integrated components of the software function as expected. The entire application is tested in a real world environment like communicating with database, network, hardware and other applications. End to end testing methodology is used to test the performance of the application and whether the flow of an application is performing as designed. Generally end to end testing is phase of software testing which not only validates the software system but also checks the integration with external interfaces. The purpose of software testing is to exercise a complete production like environment. Along with software system it also checks the batch or data processing through other upstream or downstream systems. End to end testing is done usually after functional and system testing.
Why we need end to end testing?
The modern software systems are complex and are interconnected with each other. The part of a system or the subsystem may be different in functioning from the current system or may be owned by other company. If any one of the subsystem fails then the whole system may collapse. This major risk can be avoided by this end to end testing process. It verifies the complete system resource flow. It increases the test coverage of various subsystems. It helps to detect with various issues of subsystems and increase the confidence of any software application.
The chief activities involved in end to end testing are
- The study of end to end requirements
- Test environment is set up with hardware and software requirements
- The systems and subsystems processes is described
- Roles and responsibilities of all the systems are explained.
- Testing the methodology and its standards
- End to end requirement tracking
- Input and output data of each system