Tuesday, March 14, 2006

Functional Testing Vs Non-Functional Testing

S. No

Functional Testing

Non-Functional Testing


Testing developed application against business requirements.

Functional testing is done using the functional specifications provided by the client or by using the design specifications like use cases provided by the design team.

Testing the application based on the clients and performance

Non-Functioning testing is done based on the requirements and test scenarios defined by the client.


Functional testing covers

· Unit Testing
· Smoke testing / Sanity testing
· Integration Testing (Top Down,
Bottom up Testing)
· Interface & Usability Testing
· System Testing
· Regression Testing
· Pre User Acceptance Testing
(Alpha & Beta)
· User Acceptance Testing
· White Box & Black Box Testing
· Globalization & Localization

Non-Functional testing covers

· Load and Performance Testing
· Ergonomics Testing
· Stress & Volume Testing
· Compatibility & Migration Testing
· Data Conversion Testing
· Security / Penetration Testing
· Operational Readiness Testing
· Installation Testing
· Security Testing (Application
Security, Network Security,
System Security)


Anonymous said...

Best difference between functional and non functional.

Anonymous said...

The difference mentioned has cleared my confusion.

Have a query, which was put by an interview:

Difference between Functional Testing and Exhaustive Testing.

Please do clarify.

Anonymous said...

Functional Testing = use spec to drive testing e.g. function to add customer then build tests to show addcust function working correctly, and then with 'wrong' data to show error handling

Exhaustive testing = the impossible i.e. testing every logical branch of every part of the system with every combination of data

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Anonymous said...

nice explanations but black box testing includes the Load, stress, Performance etc testing.


RaViNdRa PaRcHa said...

Very nice difference...

Siva said...

there is one correction which is USABILITY testing is non-functional testing and Secutirty testing is Functional testing

Siva said...

from the above table, one corrections which is USABILITY testing is non-functional and Security testing is Functional testing.

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Anonymous said...

Anonymous said...

Good explanation of functional and non-functional testing.


Anonymous said...

Good Job!! This answer clears my all queries.