E2E type of testing performs testing of the application’s entire flow, including the different subsystems.
End-to-end testing is a testing methodology testers employ to test an application’s workflow from start to finish. The objective of end-to-end testing is to validate system integration and to make sure data is secure.
With a focus on the user experience, testers replicate user scenarios to the best of their knowledge, ability, and expertise. They achieve success when the software application performs as expected, based on business requirements and customer expectations.
Testing end to end means that the tests involve the entire user interface experience within the application, carrying out each operation the system performs. This includes monitoring if:
The app testing process also tests every operation the application can execute. This reveals:
E2E testing design also validates data/batch processing from upstream and downstream systems. The test uses production-like information and test environments to duplicate real-time settings and situations.
Testers usually execute end-to-end software testing after they have performed system and functional testing.
This test is more commonly used. With horizontal testing, testers test from a user perspective by determining if the user can navigate the software and use functions as required. The test also allows testers to detect bugs and exceptions that prevent users from using the software’s various functions. An example is an e-commerce web app. Testers test to see if the user can sign up or log in to their profile, search, add items to their cart, enter data securely, confirm their purchase, and log out.
Testers employ vertical E2E tests when testing critical parts of a complex system that do not involve interfaces or users. Testers test in levels or layers: integration, data, business, and presentation layers.
They conduct the test in either a sequential or hierarchical order. Testers vertically E2E test if the system is highly technical or has no user input. An example of vertical end-to-end testing is testing an API.
When building user functions, testers must:
In order to build conditions based on user functions, testers establish a set of specifications for each one. This may include data integrity requirements, timing, or any other elements that could affect the functions.
When constructing test cases for end-to-end testing, testers need to:
To perform E2E testing most effectively, we recommend a testing strategy and several best practices to help you with test case preparation.
Once you have everything defined, you can begin implementing test execution, then review the results and determine the steps to address any issues you identified.
You can test registering as a user on a website, using a feature, or paying for a service or product.
To test any one of these end-to-end, follow these steps.
Your goal is to test the complete workflow from the customer’s perspective, validate the various interfaces, and ensure the flow of information between the various system components all work as expected.
Here are some basic steps that testers use to realize successful end-to-end testing.
Read how Cox Automotive drove down defects with end-to-end testing.
The Parasoft Continuous Quality Platform enables teams to implement end-to-end testing framework within a CI/CD pipeline as part of a DevOp’s workflow. Parasoft provides the type of test automation tools teams need to move faster and focus on the code and activities that matter.
Parasoft was built for testing automation, so testers can run even the most complex unit testing, API testing, UI testing, or end-to-end testing case with a simplified command-line execution or programmatically via an open API call.
With Parasoft’s integrated service virtualization and environment management features, testers can deploy lightweight virtual services that behave exactly like the real systems in the environment. This creates a predictable test environment that is ready when you are. It also enables the creation of tests or test suites that focus only on the application changes that are important for your team.
As we have emphasized, E2E testing tends to be more thorough. For example, it tests the software system plus the subsystems. System testing validates only the software system. End-to-end testing goes through the entire system. System testing checks just features and functions.
A typical software project consists of a number of units coded by various developers. Integration testing combines the software units and tests them en masse, verifying that the units work well together as a group. End-to-end testing confirms that the software operates correctly from start to finish in the user flow, replicating real user scenarios and behavior, and using production-equivalent data.
Ideally, testers use E2E testing for a typical or common use case flow. They handle exception testing earlier with unit tests and integration tests to find and resolve errors.