Topic: Boundary Value Analysis.

Message

   Boundary Value Analysis.
It
is observed that boundary points for any inputs are not tested
properly. This leads to many errors. Large number of errors tend to
occur at boundaries of the input domain.
Boundary Value Analysis(BVA) leads to selection of test cases that exercise boundary values.
BVA
complements equivalence partitioning i.e. select any element in an
equivalence class, select those at the ''edge' of the class.
Examples:
1.   For a range of values bounded by a and b, test (a-1), a, (a+1), (b-1), b, (b+1). 
2.   If input conditions specify a number of values n, test with (n-1), n and (n+1) input values. 
3.   Apply 1 and 2 to output conditions (e.g., generate table of minimum and maximum size). 
4.   If
internal program data structures have boundaries (e.g., buffer size,
table limits), use input data to exercise structures on boundaries. 

BVA
and Equivalence partitioning both helps in testing the programs and
covers most of the conditions. This method does not test the
combinations of input conditions

Author	Message
tanushree Senior Member Joined: 04Apr2007 Online Status: Offline Posts: 2160	Topic: Boundary Value Analysis. Posted: 18Oct2007 at 1:10am
	Boundary Value Analysis. It is observed that boundary points for any inputs are not tested properly. This leads to many errors. Large number of errors tend to occur at boundaries of the input domain. Boundary Value Analysis(BVA) leads to selection of test cases that exercise boundary values. BVA complements equivalence partitioning i.e. select any element in an equivalence class, select those at the ''edge' of the class. Examples: 1. For a range of values bounded by a and b, test (a-1), a, (a+1), (b-1), b, (b+1). 2. If input conditions specify a number of values n, test with (n-1), n and (n+1) input values. 3. Apply 1 and 2 to output conditions (e.g., generate table of minimum and maximum size). 4. If internal program data structures have boundaries (e.g., buffer size, table limits), use input data to exercise structures on boundaries. BVA and Equivalence partitioning both helps in testing the programs and covers most of the conditions. This method does not test the combinations of input conditions Post Resume: Click here to Upload your Resume & Apply for Jobs

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