Terms

Functional Testing

What is Functional Testing?

Functional testing is a type of software testing that verifies whether each application feature works as per the software requirements, ensuring that the system behaves according to the specified functional requirements and meets the intended business needs. It focuses on the results of processing rather than the mechanics of the processing, determining whether the application satisfies the basic minimum user expectations. The testing process involves providing sample inputs, capturing resulting outputs, and verifying that actual outputs are the same as expected outputs.

How to Conduct Functional Testing

To conduct functional testing effectively, follow these steps:

  • Identify the testing goals
  • Create test scenarios
  • Create test data
  • Design test cases
  • Execute the test cases
  • Deliberate on, track, and resolve defects

Functional testing techniques include end-user based/system tests, equivalence tests, boundary value tests, decision-based tests, and ad-hoc tests. To overcome common challenges, select test cases intelligently, allocate automation tasks to experienced team members, structure automation data effectively, write adaptable test cases, strategize for frequent execution, and use real device clouds for testing.

Best practices for functional testing involve evaluating all possible inputs, executing tests, and ensuring desired outputs are generated. Examples of successful functional testing include unit testing, smoke testing, sanity testing, integration testing, regression testing, user acceptance testing, and UI/UX testing. To measure functional testing effectiveness, determine desired test input values, execute tests, and evaluate the resulting test output values.

Key Elements of Functional Testing

  • Ensure User Expectations and Integration: Functional testing ensures that an application satisfies user expectations and integrates seamlessly with business processes.
  • Testing Techniques: Examples include testing user login capabilities, verifying payment gateway error handling, and confirming successful record additions to a database.
  • Validate System Features: Functional testing validates system features to ensure the system works as intended and delivers a high-quality product.
  • Automation Challenges: Selecting appropriate test cases for automation and allocating tasks to skilled team members are common challenges in functional testing.
  • Effective Implementation Steps: Determine desired test input values, execute tests, and evaluate test output values to implement functional testing effectively.
  • Comprehensive Testing Practices: Best practices include breaking down outcomes into individual units, performing smoke and sanity testing, and conducting integration, regression, user acceptance, and UI/UX testing.
  • Benefits: Functional testing helps in delivering a high-quality product by ensuring that the system works as intended and meets user expectations.

Functional Testing vs. Non-Functional Testing

Functional testing and non-functional testing are two distinct approaches to software testing. Functional testing focuses on verifying whether each application feature works as per the software requirements, ensuring that the system behaves according to the specified functional requirements and meets the intended business needs. Examples of functional testing include testing user login capabilities, verifying payment gateway error handling, and confirming successful record additions to a database.

On the other hand, non-functional testing is concerned with investigating the quality, security, or performance of the application's underlying source code. It gauges aspects such as speed, scalability, and reliability. Examples of non-functional testing include performance testing to measure the speed and responsiveness of an application, security testing to identify vulnerabilities and ensure data protection, and load testing to evaluate the application's ability to handle a specific number of users and transactions simultaneously.

Common Functional Testing Tools

Common functional testing tools include:

  • UFT One accelerates functional test automation for web, mobile, API, and enterprise applications, ensuring comprehensive coverage and reliability.
  • OpenText UFT Developer enhances functional testing by integrating with standard programming languages, IDEs, and testing frameworks, allowing for seamless shift-left testing.
  • OpenText UFT Digital Lab boosts team productivity in functional testing by providing an enterprise-level, end-to-end lab of real mobile devices and emulators.
  • OpenText Service Virtualization improves functional testing by discovering, designing, and simulating services and APIs, eliminating dependencies and bottlenecks.
  • Applitools enhances functional testing through automated visual testing using Visual AI, ensuring visual consistency and accuracy.
  • Selenium and Appium are popular open-source tools that facilitate functional testing for web and mobile applications, respectively, providing robust and flexible testing capabilities.

Other terms

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