Equivalence Class Partitioning

Equivalence class partitioning is a black box testing to divide the input data of program/software into different data classes, where the test cases can be derivated.  In simple word, the same input produces the same output.

For the example,

I have email account, for access my account I have to insert password which have condition as follows :

-  A text field permits only numeric character
- Length must be 6-10 characters long

Based that condition, the equivalence class partitioning should be like this :

                               0 1  2  3  4  5  |  6  7  8  9  10  |  11  12  13  14

 Invalid            Valid             Invalid

While evaluating equivalence partitioning, values in all partitioning are equivalence.  If  I make test cases, input 12 or 5 numerical characters as invalid values and input 8 as valid one.

Resource , Accessed at 3^rd April 2015, 11:39 AM

With Love, 

Naoo