Write 10 test cases for the condition P=R/I where R and I
are integer and P is floating point.
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Answer Posted / priyanka nagaraj
For the most part, errors are observed in the extreme ends of the input values, so these extreme values like start/end or lower/upper values are called Boundary values and analysis of these Boundary values is called “Boundary value analysis”. It is also sometimes known as ‘range checking’.
Boundary value analysis is another black box test design technique and it is used to find the errors at boundaries of input domain rather than finding those errors in the center of input.
Equivalence Partitioning and Boundary value analysis are linked to each other and can be used together at all levels of testing. Based on the edges of the equivalence classes, test cases can then be derived.
Each boundary has a valid boundary value and an invalid boundary value. Test cases are designed based on the both valid and invalid boundary values. Typically, we choose one test case from each boundary.
Finding defects using Boundary value analysis test design technique is very effective and it can be used at all test levels. You can select multiple test cases from valid and invalid input domains based on your needs or previous experience but remember you do have to select at least one test case from each input domain.
Let’s take same above example to understand the Boundary value analysis concept:
One test case for exact boundary values of input domains each means 1 and 100.
One test case for just below boundary value of input domains each means 0 and 99.
One test case for just above boundary values of input domains each means 2 and 101.
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