Functional and Non-Functional requirements in software testing

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Functional and Non-Functional requirements in software testing

Functional Requirements are specific user demands defining basic system facilities.

Non-functional Requirements, also known as non-behavioural requirements, ensure quality and adhere to project contracts.

They encompass aspects such as Portability, Security, Maintainability, Reliability, Scalability, Performance, Reusability, and Flexibility.

Load testing assesses system performance under real-world stress, identifying bottlenecks and user/transaction limits.

Beta Testing involves real users testing in a live environment, part of User Acceptance Testing.

Accessibility Testing checks if the system behaviour aligns with specified requirements.

Installation Testing reviews installation procedures, including updates, uninstallation, and reinstallation.

Non-functional Testing confirms system behaviour aligns with requirements.

Stress Testing analyses system behaviour post-failure, ensuring recovery, functionality under abnormal conditions, and proper error handling.

Gray Box Testing involves partial knowledge of the internal workings of a system during testing.

Acceptance Testing ensures the system meets user requirements.

Scalability Testing assesses how the application scales with increasing workload, user limits, client-side degradation, and server-side robustness.

Manual Testing Steps:

1.     Study project documentation.

2.     Examine the Application Under Test (AUT).

3.     Design test cases covering all documentation requirements.

4.     Review and baseline test cases with the team lead and client.

5.     Execute test cases on the AUT.

6.     Report bugs.

7.     After bug fixes, re-execute failing test cases for verification.

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