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Equivalence Partitioning

Equivalence Partitioning is the Software Testing technique in which divide the Test input data into partition of the equivalent and from these partition, we will derived the Test Cases to test the software.
As you know that it is not possible the Exhaustive Testing to test the software on every test data so we divide the Test Data in the partition. This partitioned Test Data covers the each partition and we do not need to waste our time to test for different data from single partition. This will reduce the Test Cases and also reduce the cost of the software. This is the Black Box Testing and the specification dependent Testing.

In Equivalence Partitioning, we test the software with single value form each partition and if the software work with that single value as per requirement then we assume that our software will work for other values in that partition.

Let me take an example to understand the Equivalence Partitioning suppose an input box accept only 1 to 100 integer value so we will divide the Test Date in partition


  •  First Test case will be any number greater then 100 will be invalid Partition
  • Second Test case will be any number less then 1 means 0 or less then 0 will come in invalid partition.
  • Third Test case will be both 1 and 100 will come in the valid partition
so the total value that needed to test the input are 0,1,100,101. These 4 test cases are enough to test that input. 
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