The advent of IoT and modern software applications have integrated and interconnected with every other device in our surrounding. Some find this workflow quiet complicated but its benefits are enormous. Many a times, due to failure of an organizational software system that is deployed outside the organization, the business processes are adversely affected.
In such scenarios, end-to-end testing comes to our rescue. End-to-end testing ensures that all the layers of the system are functioning as expected at its interfaces and endpoints. So, to ensure that testing is performed completely, it is necessary to perform end-to-end testing.
What is exactly end-to-end testing?
End-to End testing is a process of identifying the proper working of a complex system from its start to end. It verifies that all the system components are able to run and perform under optimal conditions in the real world scenario.
However, not to confuse, end-to-end testing is not a form of testing that is always done at the end of the development cycle. It is usually executed after functional or system testing.
There are 2 ways of performing the end-to-end testing:
Horizontal end-to-end testing includes verifying transactions across a system, from the beginning to the end, which makes sure that all the process run efficiently and their related behaviour works as expected. For e.g., for an online shopping portal, placing the order, shipping, invoice, and delivery should go in order.
Whereas, in vertical end-to-end testing, all the processes are verified and evaluated for individual layer of the application, which is tested from top to bottom. This testing is targets one module at a time and evaluates it across processes and features.
Benefits of End-to-End testing
1. Minimal failure risks
As discussed earlier, End-to-End testing observes and tests all the behaviour of the application, right from the start, ensuring that the test cases are rigorously run for every iteration of the application. Every new version of the application goes through end-to-end testing offering lesser chances of failures
2. Encounter bugs while writing the code
Yes, that’s true. End-to-end tests are supposed to find bugs, but that’s only when the test cases for the build has already been written and were introduced on the project. Many of them also said that unit tests can perform this function too, but end-to-end tests finds bugs that sometimes does not fit the logic ensuring that no module is left untested.
3. Automate redundant tasks
Many of you must not be aware that end-to-end tests can automate a task on the web page. While not exactly an end-to-end test in itself, it uses the same tools as an end-to-end test does.
4. Simulates real time scenarios
End-to-end tests simulates real time scenarios which quickly outweighs all the other types of tests. With lesser bugsand comprehensive testing, end-to-end testing decreasesthe need to redo the tests, and ultimately, the costs and time associated with doing so.
What the future holds
End-to-End testing incorporates both the black box texting, as well as, the white box testing. Depending on the type of application to be tested, either of the two tests are used.
With the advancements in Information Technology and keeping in mind the modern systems that interact with anything around us, modern software systems have gone far too complicated than it was before. Therefore, a typical end-to-end testing follows three functions:
The testing industry is integral part of any software development lifecycle, and is now looked upon as a standard practice. Effort expended towards End-to-End testing is more than rewarding if the correct solution is identified and adopted. For a successful implementation of end-to-end testing, a combination of a right automation tool and a relevant domain expert is required.