Alisha Henderson

What is Integration Testing and its approaches?

What's Integration Testing?

Integration Testing along with even the ‘Integration & Testing' is the practice of analyzing the particular modules where there's a participation of more than 1 program as a whole or only the modules from other applications. This testing is utilized to make sure the applications are capable of working smoothly by assimilating and communication with one another. This type of testing can be either a black box or white box, depending on the level of participation from other programs that are included.

Types and Approaches

1. Big Bang Approach

The developed modules/components of these applications systems are combined together. These individual modules are analyzed together when coupled. Once Unit Testing, these modules are all analyzed together which form an application system. But some of us, may have this query , just how is Software System testing as a complete and Integration testing distinct? The main thing we know here is thatin integration testing, the testing is done for the respective modules are blended together, after unit evaluations are conducted; and in applications system testing the whole system is tested with the parameters taken into consideration.

2. Bottom-Up Approach

Within this method, the non invasive modules are tested first, together and individually. All the base level modules are integrated which includes, functions and processes and are combined and analyzed. This assists in testing the greater level modules, so as it creates a foundation for this. This procedure is replicated to every one of the modules in the base level to the upper level module are analyzed thoroughly. Essentially, testing begins, by the inner and the many bottommost modules and slowly heads upward.

3. Top-Down Approach

This approach goes precisely the opposite of this bottom-up approach. The top notch module/s are tested initially and then simultaneously other lesser level modules are analyzed. The thickest modules are tested individually like specialized unit testing is run to your topmost module and other modules are taken into consideration and tested. The top-down approach asks a call function just enjoy a bottom-up approach called Stubs.

4. Hybrid/Sandwich Approach

Also Referred to as Mixed Integration Testing. Bottom-Up Approach and Top-Down Approach equally are combined to this strategy. Hence known as Hybrid or Sandwich or Mixed Integration testing Strategy. This method has been used to pay up the workouts of the approached individually. The thickest module has been unit tested and in precisely the identical time, bottom degree modules are integrated and analyzed with all the very best level modules.


With so many advancements within the area of IT, day-by-day, so many developers sitting at several locations working on precisely the exact same applications, integration testing has become a must. With its own approaches, integration testing can be used with small and large software programs equally. Integration studying, being in the center of the software testing amounts and having numerous advantages, becomes more and more important for industrial degree clients and regular check will help to maintain the program intact.

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