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black box testing:
black box testing focus on the functional requirements
of the softawre. this type of testing method attempts to
find incorrect or missing functions, errors in data
structure or exrenal database acces,initialaisation and
termination errors.
black box testing is conducted on integrated functional
components whose design integrity has been verified through
completion of traceble white box testing.
black box testing focus on system externals
black box testing the test cases are created using system
externals.
in black box testing we test the softawre without know how
it is working.
here blindly we r testing the software thats why we call it
as black box testing.
here we test the behaviuor of the application thats we also
call it as bahavioural testing.
white box testing:
white box testing examines the basic program structure and
it derives the test data from the programing logic.ensuring
that all statements and conditions have been executed
atleast once.
white box testing verify that the software design is valid
whether it was built according to the specified design or
not.
white box testing also called as stuctural testing.
in white box testing the tester should aware of the code.
execute each statement atleast once .
execute each decision direction atleast once.
execute each decision direction with all possible outcomes
atleast once.
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