what is equivalence partition? what is the use of it?

Answer Posted / priya

Equivalence partitioning is a black-box testing method
- divide the input domain of a program into classes
of data
- derive test cases based on these partitions.

Test case design for equivalence partitioning is based on
an evaluation of equivalence classes for an input domain.

An equivalence class represents a set of valid or invalid
states for input condition.

An input condition is:
- a specific numeric value, a range of values
- a set of related values, or a Boolean condition

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