What is Top-Down Integration Testing ?

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What is Top-Down Integration Testing ?

Top-down integration testing is an integration testing technique used in order to simulate the behaviour of the lower-level modules that are not yet integrated. Stubs are the modules that act as temporary replacement for a called module and give the same output as that of the actual product.
The replacement for the 'called' modules is known as 'Stubs' and is also used when the software needs to interact with an external system.


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