Software Testing

What is Testing



Testing is a process used to help

identify the correctness,

completeness and quality of

developed computer software.

Testing is nothing but criticism or

comparison, that is comparing the

actual value with expected one.

software faults and

oftware failures



failure - the software does not do

what the user expects



faults - error in the correctness of

the semantic of a computer program

hite box

(

glass box

)

Testing



In white box or "glass box", testing

the test developer has access to the

source code. They ensure that

components used in the construction

are functional to some degree.

lack box

Testing



In black box testing the test

engineer only accesses the software

through the same interfaces that the

customer or user would.

rey

ray

)

esting



he typical grey box tester is

permitted to set up or manipulate the

testing environment. It can also be

used of testers who know the internal

workings or algorithm of the

software under test and can write

tests specifically for the anticipated

results.

ALFA

Testing Phase



n the first phase of alpha testing,

developers test the software using

white box techniques. Additional

inspection is then performed using

black box or grey box techniques.

BETA Testing Phase



Versions of the software, known as beta-

versions, are released to a limited

audience outside of the company. Testing

during the beta phase, informally called

'beta testing, is generally constrained to

black box techniques although a core of

test engineers are likely to continue with

white box testing in parallel to the beta

tests.

GAMMA Testing Phase :]



Cynics have referred to all software

releases as "gamma testing" since

defects are found in almost all

commercial, commodity and publicly

available software eventually

Remember !



lpha and beta refer to stages of the

software before release (and also

implicitly on the size of the testing

community, and the constraints on

the testing methods), white box,

black box, and grey box refer to the

ways in which the tester accesses

the target.

ycle o

testing



Requirements Analysis: Testing should begin in the

requirements phase of the software life cycle(SDLC).



Design Analysis: During the design phase, testers work

with developers in determining what aspects of a design

are testable and under what parameter those testers work.



Test Planning: Test Strategy



Test Development: Test Scenarios, Test Cases, Test Scripts

to use in testing software.



Test Execution: Testers execute the software based on the

plans and tests and report any errors found to the

development team.



Test Reporting: Once testing is completed, testers

generate metrics and make final reports on their test effort

and whether or not the software tested is ready for

release.



Retesting the Defects

System testing



Most software produced today is

modular. System testing is a phase

of software testing in which

developers see if there are any

communications flaws--either not

passing information, or passing

incorrect information--between

modules.

Code Coverage



Code coverage is inherently a white box testing

activity.process allows developers and quality

assurance personnel to look for parts of a system that

are rarely or never accessed under normal conditions

(error handling and the like) and helps reassure test

engineers that the most important conditions

(function points) have been tested.



process allows developers and quality assurance

personnel to look for parts of a system that are rarely

or never accessed under normal conditions (error

handling and the like) and helps reassure test

engineers that the most important conditions

(function points) have been tested.

Document Outline