1. Type of testingdone in a Data Warehouse project:
The type and numberof testperformed ona data warehouse varieswith projects.
Some of the commononesare:
1. Requirementtesting:
Requirementtestingisconductedbefore anyotherlevel of testing.
It verifieswhetherornotall the requirementsprovidedinthe specificationare fulfilled.
2. ETL testing:
In the ETL testingstage,we make sure thatappropriate changesinthe source systemare captured
properlyandpropagatedcorrectlyintothe datawarehouse.
3. Smoke Testing:
A smoke testisa collectionof writtenteststhatare performedona systempriorto beingacceptedfor
furthertesting. Thisisalsoknownasa buildverificationtest.
4. Functional Testing:
In the functional testingstage,we make sure all the business requirementsare fulfilled.
5. UnitTesting:
Developersperformtestsontheirdeliverablesduringandaftertheirdevelopmentprocess.
The unittest isperformedonindividual componentsandisbasedonthe developer'sknowledgeof what
shouldbe developed.
6. IntegrationTesting:
Here we validate the businessandfunctional requirementfromwhich dataaccordingto correct
businessrulesshouldproduce the correct numberof rowsbeingtransferredandtoverifythe dataload
volumes.
7. RegressionTesting:
Validate thatthe systemcontinuesto functioncorrectlyafterbeing changed.
It isperformedafteradefectreportedhasbeenfixedbydeveloper.
8. End-to-endtesting:
In the end-to-endtestingstage,we letthe systemrunfora few daysto simulate productionsituations.
9. SystemTesting:
SystemTestingisperformedtoprove thatthe systemmeetsthe functional specifications fromanendto
endperspective. We asa testingteamwill verifythatthe datainthe source system databasesandthe
data inthe targetare consistentthroughoutthe process.
Here QA environmentshouldbe the replicaof Productionpriorrunning the systemtest.
10. UserAcceptance Testing:
The objective of useracceptance testingistocertifythata release meetsuserexpectationsandisready
for production.