Structural testing versus Functional Testing

	Structural Testing	Functional Testing
1	Structural Testing is also known as White Box or Open-Box Testing	Functional Testing is also known as Black Box or Closed-Box testing.
2	Structural Tests will be performed based on the knowledge of internal features of the Software/Source Code.	Functional tests will be performed without having the knowledge of internal features of the software.
3	Both the testers and the programmers are dependent on each other for test process.	Both the testers and the programmers are not dependent and performs the tests individually.
4	It is less effective when compare to the Functional Testing.	It is more effective than the Structural Testing.
5	Inputs are represented by certain predefined paths in software	Inputs are represented by some peripheral devices or simulated systems.
6	The tests cases take finite time but can’t detect all bugs.	The tests cases take infinite time and detect all errors
7	Tests are performed either from programmers or designer’s perspective.	Tests are performed from user’s perspective.
8	Different methods are used for performing the white box texting,which are as follows:- ·        Statement Testing. ·        Decision Testing ·        Condition Testing	Different methods are used for performing the Black box texting,which are as follows:- ·        Expected inputs method ·        Boundary values method ·        Illegal values method
9	It helps in removing the un-necessary code that may results in some bugs or errors	It helps in disclosing the problems and inconsistencies that may arise in functional testing.