Explain Top-Down Strategy of Integration Testing?

Top down integration is primarily considering as an approach where modules are developed and testing of that modules always starting at the finest level of the programming hierarchy and continuing towards the lower levels.

Top down strategy of integration testing is an incremental approach because we proceed one level at a time. It can be determine either in “depth first search” and in “breadth first search” manner.

So now the question arises what does depth and breadth mean?

Depth means we always proceed from the top level complete the way down to the lowest level. 

Below is given the meaning of breadth.

What is the meaning about breadth?

Breadth on the other hand is different with depth so breadth means that we start at the top of the hierarchy and then steadily go to the next level. We develop and test entire modules at this level before continuing with another level.


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