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Answer Posted / shilpa s
Testing techinique can be used to effectively desgin
efficient test cases.These techinique can be grouped into
blockbox and white box testing.
BlockBox testing techiniques:
when creating block box test cases , the input data used is
critical. Three successful techiniques or managing the
amount of input sata reuires include:
1.Equivalance partitioning.
2. Boundary Analysis.
3.Error guessing.
EQUIVALANCE PARTITIONING:
Euivalance partitioning is a techinique for testing
equivalance classes rather than undertaking exhaustive
testing of each value of the larger class. for example
a program which edit credit limits within a given range
(1,000 -1,500) would have three equivalance classes;
< 1,000 ( invalid)
Between 1,000 and 1,500 ( valid)
> 1,500 ( in valid)
BOUNDARY ANALYSIS:
A techinique that consist of developing test cases and data
that focus on the input and output boundaries of a given
function. In same credit limit example, boundary analysis
would test:
Low boundary +/- one(999 and 1,001)
on the boundary ( 1,000 and 1, 500)
Upper boundary +/- one(1,499 and 1,501)
ERROR GUESSING:
Test cases can be developed based upon the intuition and
experience of the tester . For example in an example where
one of the inputs is the date, a tester may try february
29, 2000
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