END TO END TESTING – H2kinfosys

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
The difference between End to End test and system testing is:
1. System testing: 
Testing the whole system all components of the system is functioning as expected. For example in e-commerce website browsing items, cart and check out.

2. End to end test: 

Here the actual workflow of a system is tested. Can a user navigate through the applications and does it work. It uses the exact production like data and the test environments to simulate the real time settings. It is also called as chain testing.




For example consider a situation where you login into your bank account and want to deposit some amount to another bank account which becomes third party subsystem. You follow the below steps
1.       Logging into the bank system
2.       Check the balance amount
3.       Deposit some money to  another bank from your account
4.       Check your latest balance
5.       Check out from your account
Following activities are done for testing build conditions like
·         Building a set of conditions for all the functions defined
·         The conditions which include data conditions, sequence and timing
End to End testing is a process of verifying the software system with its subsystems or parts. Here having the knowledge of whole system as well as interconnected subsystems is must.

Questions

1.       What is End to End testing?
2.       What are the difference between system testing and End to End testing?
3.       Give some examples that prove that chain testing gives better performance for software product?

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