Software Engineering Tutorials

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Software Engineering Tutorials

Retesting the already test modules and adding new modules .Regressive testing is an important strategy for reducing side effects. System Level Testing Performance testing:- Performance testing is designed to test the run time performance of software or hardware
Recovery testing :- is a system test forces the software to fail in a variety of ways and verifies
that recovery is properly performed .if recovery is automatic, re initialization , check pointing
,data recovery and restart are evaluated for correctness.
Security Testing :- Security testing attempts to verify that protection mechanisms built into a
system will in fact ,protect it from improper penetration. Acceptance testing:- when customer software is built for one customer ,a series of acceptance tests are conducted to enable the customer to validate all requirements.conducted by the end user rather
than software engineers, an acceptance test can range from an informal test drive to a planned
and systematically executed series of tests. if software is developed as a product to be used by many customers ,it is impractical to perform acceptance tests with each one.Most software product builders use a process called
alpha and beta testing to uncover errors that only the end user seems able to find
Test Case Design A product can be tested in one of two ways
Knowing the specified function that a product has been designed to perform, tests can be conducted that demonstrate each function is fully operational. This is know as black box testing. Knowing the internal workings of a product , tests can be conducted to ensure that the internal operation of the product performs according to specification and all internal components
have been exercised. This is know as white box testing
White box testing:-
Using white box testing methods,the software engineer can derive test cases that do the
following:- Guarantee that all independent paths with in a module have been executive once at least.
Exercise all logical decisions on their true and false sides
Exercise all loops ,data flow,conditional testing are working Black box testing:-
Black box testing methods focus on the functional requirements of the software. It enables the
software engineer to derive sets of input conditions that will fully exercise all functional
requirements for a program .Black box testing is not an alternative to white box testing
techniques .Rather it is a complementary approach that is likely to uncover a different class of
errors than white box methods.

Software Testing Fundamentals Testing objectives include 1. Testing is a process of executing a program with the intent of finding an error.