Example of Top Down Integration Testing
In the top-down integration testing, if the depth-first approach is adopted then we will start integration from module M1. Then we will integrate M2, then M3, M4, M5, M6, and at last M7.
In the top-down integration testing, if the breadth-first approach is adopted, then we will integrate module M1 first, then M2,and M6. Then we will integrate module M3, M4, M5, and at last M7.
Steps in Top Down Integration Testing
Top-down testing is a type of incremental integration testing approach in which testing is done by integrating or joining two or more modules by moving down from top to bottom through the control flow of the architecture structure. In these, high-level modules are tested first, and then low-level modules are tested. Then, finally, integration is done to ensure that the system is working properly. Stubs and drivers are used to carry out this project. This technique is used to increase or stimulate the behavior of Modules that are not integrated into a lower level. Processing:
The following are the steps that need to be followed during processing :