What Does End to End Testing Mean?
End to end testing ensure a system works as required for the end-user by testing the various flows that a user might use within an application. In fact, the expression “beginning-to-end” would be more fitting because this testing concentrates on testing the flow from the beginning to the end of a given process.
It’s often discussed with two other common testing types: unit testing and integration testing.
Unit testing concentrates on the smallest parts of an application — testing an API endpoint, testing a function, etc. While unit testing lets the tester to concentrate on these components, it is important to assure that all the pieces work together.
Ensuring the pieces work together properly is the aim of integration testing. While integration testing helps assure the reliability of an application, it does not incorporate everything. Because we do not comprehend how the application works for the end-user. And this is where the end to end tests get in.
Examples involve testing a user experience such as:
- Paying for a product or service on a website.
- Registering on a website.
- Using a feature.
All these would be prepared in a test environment which would ideally represent the production environment in terms of API services used, databases used, and type of device used.
How Do E2E Tests Work?
E2E tests include applying tests that support the flow of an application and help identify a break in the flow. A break in the flow would discover an error in the application.
Here’s the usual process included in E2E testing:
- Tests are designed and planned for different conditions using testing frameworks or platforms.
- The tests are executed (usually on different devices).
- The breaking tests fail.
- The developer debugs the code that broke.
- Then the tests are re-run.
E2E Testing Checklist
E2E is not only about testing the user interface because there are several pieces that make up a user interface.
Here’s a checklist that can be observed during E2E tests:
- Database: The database used for your system would require to be tested. You could test to assure that data are organized properly, stored properly, can be read, and updated perfectly.
- Performance: A webpage may navigate perfectly but the speed also matters for user experience. Hence, it’s crucial to test the performance of a page or feature.
- Security: Web application security defines how safe an application is for the user and the organization. Vulnerability testing tools are particularly important in this case.
- Functionality: This is the main reason for testing in the first place. All features must perform as expected. Unit tests can also be relevant here.
- Usability: As components are functional, they should be usable. Users are as necessary as the tool, so tests must include events (like clicks) on elements, proper navigation, and so on.
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