What Is Integration Testing AND Types Of Integration Testings?

Integration Testing:
Combining the modules and testing the flow of data between them.
Integration Testing is divided into 2 types.

Incremental Integration Testing:
Adding the modules incrementally and checking the data flow between them. Modules are added in a sequential fashion.
Ex:

This can be done in two ways a) Top-Down Approach b) Bottom-Up approach.

a) Top-Down Approach:
In this Approach child should be direct descendant of parent. Data flow is from top to bottom, child module is added in incremental fashion.

b) Bottom-Up Approach:
It is exact reverse of Top-Down approach.

Non Incremental Integration Testing:
It is also called as Big Bang Method. In this approach modules are added simultaneously, it is going to be difficult to know why the particular issue is happening.



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