it is nothing but estimating the effeciency of test data by 
deliberately introducing bugs

A method whereby purposely inserted erros into a 
programming code under test to verify that the detect the 
defect. It is also known as error seeding.

comments please......

suneel your wrong, the correct answer is given by Guest

The answer which is given by Guest is called Defect 
Injection Not Mutation Testing

Ok na Ashok Reddy

suneel,
Mutation means absolutely bug injection,please you will go 
through the william perry.
thanks,
ashok

it means that purposely u introduce bugs & it is also known 
as bebugging.

Poonam,
I think lot of diff is there between debugging and mutation.
i deffinetely consider you and suneel suggetions, today i 
will discurse with my team and i will let you know.
Thanks,
Ashok

hi ashok

first of all i not talking about debugging.
i have written about bebugging. bebugging & mutation is 
same.

thanks poonam

A testing methodology in which two or more program mutations
are executed using the same test cases to evaluate the
ability of the test cases to detect differences in the
mutations.

or

A method whereby errors are purposely inserted into a
program under test to verify that the test can detect the
error. Also known as error seeding.

or

A method to determine test set thoroughness by measuring the
extent to which a test set can discriminate the program from
slight variants of the program. Non-intrusive Testing:
Testing that is transparent to the software under test; ie,
testing that does not change the timing or processing
characteristics of the software under test from its behavior
in a real environment. ...

Who plans and who does bebugging in testing.

oh!!!! Kewl the topic now entered into Debugging!!!! :-)

After the initial testing is complete, mutation testing is 
taken up. The idea behind mutation testing is to make a few 
arbitrary small changes to a program at a time, each
time the program is changed it is called a mutated program; 
the change is called a mutant.

A mutated program tested against the full test suite of the 
program. If there at least one test case in the test suite 
for which a mutant gives an incorrect result, then the 
mutant is said to be dead. 

If a mutant remains alive even after all test cases have 
been exhausted, the test suite is enhanced to kill the 
mutant.

The process of generation and killing of mutants can be 
automated by predefining a set of primitive changes that 
can be applied to the program.

The primitive changes can be:
? Altering an arithmetic operator,
? Changing the value of a constant,
? Changing a data type, etc.

A major disadvantage of mutation testing:
? computationally very expensive,
? A large number of possible mutants can be generated.

Valid?????? :-)

Make perfection in coding the developers intentionally made 
mistakes for particular object to check whether it will 
work same as correct code

Mutation test means a change in your program  programmers
are perform changes in tested programs to estimate
completeness and correctness of the program testing

Hi,
  In the mutation testing we create the mutants(duplicate
copy) and then we test on the mutants and finds whether any
difference is there between the mutants and the original
program after the test.

Plz comment if i m wrong......

nitin9360@yahoo.com

Mutation means a change in a program. Programmers are 
performing changes in programs to estimate correctness of 
testing coverage.
 
For eg: one test passed, then apply certain change in that 
particular program and test it... if the result is failed 
then we can say it as a mutation testing i.e a change 
should affect the result ..

straight,Purposefully introducing the bug in the 
application and checking the the variation in the expected 
result. this is Mutation testing or bebugging, No 
confusions.

Just remember we are intentionally introducing the bug......

More information is available at 
http://en.wikipedia.org/wiki/Mutation_testing

Mutation means a known change in a program. during this 
testing developers will check whether all modules are 
participating or not while executing the program.

Mutation Testing means a complex change in a program used 
to estimate Test Coverage of a Program.

Mutation testing means introduse the new bug and clear that 
bug and testing the application

Mutation Testing is nothing but testing the program by 
changing the Logic.


VNK
Testing Engineer.,