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End-to-End Testing

It is a sort of software testing type which validates entire software from starting to end along with its integration with external devices. The purpose of end-to-end testing is testing entire software for dependencies, data integrity and communication with other systems, interfaces and databases to exercise the total production with the software system. It also validates batch/data processing from other upstream/downstream systems. Therefore it is called end-to-end testing. It is usually executed after the functional testing and system testing. It uses production like data and test environment to simulate real-time settings. This testing is also called as chain testing.

 END-To-END Testing Guide: Complete E2E Testing Tutorial

Why we need end-to-end testing?

End-to-End testing verifies the whole system flow and increases confidence by recognizing issues and increases Test Coverage of subsystems. Modern software systems are complex and interconnected with multiple subsystems that may differ from current system. The entire system can collapse by failure of any subsystem that is major risk which can be avoided by End-to-End testing.

The End-to-End process

 END-To-END Testing Guide: Complete E2E Testing Tutorial

The activities which are involved in End-to-End testing are:

  • Studying of end-to-end testing requirements.
  • test environment setup and hardware/software requirements.
  • describing all the systems and its subsystems processes.
  • It describes the roles and responsibilities for all the systems.
  • Testing process and standards.
  • End-to-End system requirements tracking and designing of test cases.
  • Input and output data from every system.

Consider an example e-commerce website,

When we are searching for a particular product, say we want an iphone. We go to mobiles in the search option and click the required model, check for the delivery at area by giving the zip code. Then add the product to the cart, check whether the same product along with the price has occurred in the cart by opening it. Then checking with payment option by card or delivery and further processing of it. Like this, we will test end to end in the website from the moment we select the product until we buy.

Metrics of end-end testing:

The following are the metrics used for end-end testing:

  1. Test case preparation status- It gives test case preparation progress against planned.
  2. Weekly Test Progress- Provides week wise details of percentage test completion-failed, not executed and executed against planned for execution tests.
  3. Defects status and details- It provides percentage of open and closed defects by week. Week-wise defects distribution based on severity and priority.
  4. Environment Availability- The total number of hours “up”/may be total number of hours scheduled per day for testing.

The benefits of end-end testing are:

  1. It expands test coverage
  2. It make sure the correctness of the application
  3. Reduce time to market.
  4. It reduces the cost
  5. It detects bugs.

End-end testing appeals to many groups like:

  • Developers- Developer benefits from it because, most of the testing is offloaded to others.
  • Testers- Testers finds it useful because writing tests that verify real-world behaviour help them avoid problems and achieve a greater sense of accomplishments.
  • Managers- Managers like because user simulation tests let them know how a failing test would have impact on user.

When we should apply End-to-end testing?

End-end testing is regularly conducted on finished products and systems, making each review a test of the whole system. The second test will occur if the system doesn’t give output what is expected or if a problem is found. The team records and studies over the data to determine the issue’s origin then fix and re-test.

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