Black box and white box testing

Black-box testing is a method of software testing that examines the functionality of an application based on the specifications.
White box testing is a testing technique, that examines the program structure and derives test data from the program logic/code

1. BLACKBOX AND WHITEBOX TESTING
Prepared By:
Mr. Surya Prakash Pandey
Awadhesh Pratap Singh Uniersity,
Rewa(M.P.)

2. BLACKBOXTESTING
InBlackBoxTestingwejustfocusoninputsand
outputofthesoftwaresystemwithoutbothering
aboutinternalknowledgeofthesoftwareprogram.
[Figure of Blackbox Testing]
TheaboveBlackBoxexecutableprogramcanbeany
softwaresystemyouwanttotest.

3. BLACKBOXTESTING
Byapplyingblack-boxtechniques,youderiveasetof
testcasesthatsatisfythefollowingcriteria:
(1)testcasesthatreduce,byacountthatisgreater
thanonethenumberofadditionaltestcasesthatmust
bedesignedtoachievereasonabletesting,and
(2)testcasesthattellyousomethingaboutthe
presenceorabsenceofclassesoferrors,ratherthan
anerrorassociatedonlywiththespecifictestathand.

4. BLACKBOXTESTING
Blackbox Techniques/ Methods:
Equivalencepartitioning:Itisasoftwaretestdesign
techniquethatinvolvesdividinginputvaluesintovalid
andinvalidpartitionsandselectingrepresentative
valuesfromeachpartitionastestdata.
BoundaryValueAnalysis:Itisasoftwaretestdesign
techniquethatinvolvesdeterminationofboundaries
forinputvaluesandselectingvaluesthatareatthe
boundariesandjustinside/outsideoftheboundaries
astestdata.
Causeeffectgraphing:Itisasoftwaretestdesign
techniquethatinvolvesidentifyingthecases(input
conditions)andeffects(outputconditions),producing
aCause-EffectGraph,andgeneratingtestcases
accordingly.

5. WHITEBOXTESTING:
WhiteBoxTesting(alsoknownasClearBoxTesting,
OpenBoxTesting,GlassBoxTesting,TransparentBox
Testing,Code-BasedTestingorStructuralTesting)is
asoftwaretestingmethodinwhichtheinternal
structure/design/implementationoftheitembeing
testedisknowntothetester.
WhiteBoxTestingisliketheworkofamechanicwho
examinestheenginetoseewhythecarisnotmoving.
Usingwhite-boxtestingmethods,youcanderivetest
casesthat
(1)guaranteethatallindependentpathswithina
modulehavebeenexercisedatleastonce

6. (2) exercise all logical decisions on their true and
false sides
(3) execute all loops at their boundaries and within
their operational bounds
(4) exercise internal data structures to ensure their
validity.
WHITEBOXTESTING:

7. WHITEBOXTESTING:
[Figure of Whitebox Testing Approach]

8. WHITEBOXTESTING:
WhyandWhenWhite-BoxTesting:
Whiteboxtestingismainlyusedfordetectinglogical
errorsintheprogramcode.
Itisusedfordebuggingacode,findingrandom
typographicalerrors,anduncoveringincorrect
programmingassumptions.
Whiteboxtestingisdoneatlowleveldesignand
implementablecode.
Itcanbeappliedatalllevelsofsystemdevelopment
especiallyUnit,systemandintegrationtesting.
Whiteboxtestingcanbeusedforotherdevelopment
artifactslikerequirementsanalysis,designingandtest
cases.

9. WHITEBOXTESTING:
Whitebox Testing Techniques:
Following are Whitebox testing techniques:
Statementcoverage:Thistechniqueisaimedat
exercisingallprogrammingstatementswithminimal
tests.
Branchanddecisioncoverage:Thistechniqueis
runningaseriesofteststoensurethatallbranchesare
testedatleastonce.
Tools:Anexampleofatoolthathandlesbranch
coveragetestingforC,C++andJavaapplications
isTCAT-PATH
Pathcoverage:Thistechniquecorrespondstotesting
allpossiblepathswhichmeansthateachstatement
andbranchiscovered.

10. WHITEBOXTESTING:
[Figure of Path coverage Example]

11. COMPARISONOFBLACKBOXTESTINGANDWHITEBOXTESTING:

12. COMPARISONOFBLACKBOXTESTINGANDWHITEBOXTESTING:

13. THANKYOU