What Is The Difference Between UAT and E2E Testing

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Aditya Tomar
Table of Contents

Table of Contents

Introduction

UAT and E2E testing are two important types of software testing that verify a system meets requirements from an end-user perspective. Though similar in some respects, there are key differences between UAT and E2E testing.

What is UAT Testing?

Purpose of UAT Testing

UAT testing is conducted by the end users or their representatives to determine if a system meets the business requirements and is ready to be deployed in a production environment. The primary goal of UAT testing is to evaluate the system's usability, reliability and compliance from an end user's point of view.

UAT Testing Process

The UAT testing process typically involves:

  • Defining test scenarios based on business requirements

  • Performing tests on a test environment that mimics production

  • Testing all aspects of the system the end users will interact with

  • Identifying defects and gaps in functionality

  • Providing sign-off to indicate the system is ready for production

What is E2E Testing?

Purpose of E2E Testing

The purpose of E2E testing is to verify that a system's features function correctly when integrated and when interacting with external interfaces. E2E testing evaluates the system as a whole rather than individual components.

E2E Testing Process

The E2E testing process typically involves:

  • Defining test scenarios that exercise all parts of the system

  • Testing the system from initial input to final output

  • Testing interactions between system components and external interfaces

  • Ensuring data and requests flow correctly between components

  • Identifying defects in system integration and E2E workflows

Differences Between UAT and E2E Testing

  • UAT focuses on verifying the system meets business requirements from an end user's perspective. E2E testing focuses on verifying system integration and E2E workflows.

  • UAT is conducted by end users or their representatives. E2E testing is usually performed by testers and developers.

  • UAT tests functionality that end users will interact with directly. E2E tests the system as a whole, including components end users do not see.

  • UAT requires a test environment that closely mimics production. E2E testing can be performed on lower environments that do not need to mimic production exactly.

  • UAT aims to identify usability issues and gaps in requirements fulfillment. E2E testing aims to identify defects in system integration and E2E workflows.

  • UAT provides sign-off to indicate the system is ready for production from an end-user perspective. E2E testing provides information to developers about defects in system integration.

Conclusion

Both UAT and E2E testing are integral parts of a comprehensive testing strategy. UAT ensures a system meets business needs, while E2E testing ensures the system's components integrate and function together properly. Though they have some overlap, each type of testing has a distinct focus and purpose. An effective testing approach utilizes both UAT and E2E testing to deliver high-quality software.

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