Hi, Can anybody tell me what is Boundary value analysis,
equivalence partitioning and error guessing with examples?
Answer Posted / bizz
Boundary Value Analysis (BVA): This is a testing technique
to validate a application by testing the boundary value
conditions. Lets take an example:
We have a edit field which accepts values from 1
to 100. By BVA, we can test this field using the invalid
and valid boundary values i.e. -1, 1 and 2 for the first
boundary and 99, 100 and 101 for the second boundary value.
Here the invalid conditions are -1 & 101 and the valid
conditions are 1,2 & 99,100.
Equivalence Patitioning or Equivalant Class Patitioning:
This is also a testing technique which divides the input
data into different classes and test the application by
selecting a value from each class. Lets take the same
example as above:
Here, the difference is that the 1-100 values
are divided into 4 classes i.e. 1-25, 25-50, 50-75 and 75-
100. Now, we select a value from each classes and test the
edit field.
The advantage of this technique is it can cover
a large dataset where we cannot manually go and check each
and every value.
Error Guessing: This technique is the most informal way of
testing a application. For using this technique, one need
to have a good command of the application and should know
the history of the application. As the name suggest, tester
have to guess where could be the possible defects by
keeping the defect history of the appliaction in mind.
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