Software Integration Testing

Integration Testing
Computers are an integral part of human life. They are that important facet of technology that makes for an easier life at both home and office. Every computer runs on software's that are meticulously developed and tested. One of the most critical steps in software development is testing. In this article, we shall discuss one such crucial testing technique known as Software Integration Testing or SIT.

What Is Integration?

In order to understand Software Integration Testing one first need to know what is the meaning of "integration". The process or act of combining and consolidating the various components of a single framework or structure is known as integration. In other words, integration is unifying each separate aspect of any product to make a complete picture.

Software Integration Testing

Each and every software consists of multiple modules that converse with each other through an interface. Assimilating or integrating these individual modules and testing them as one is known as Software Integration Testing. Sometimes the integration may form the complete software and yet at other times, it might form a major part of it.

Features Of Integration Testing

The prime features of Integration Testing are:

  • Done After Unit Testing Is Complete - The most important requisite of Integration Testing is that each module should have been successfully unit tested before the integration can take place. The idea is to ensure that every unit is correctly performing its designated task. Once the performance of each unit is validated it is combined with the next one. At each level of integration, the software is continually tested to make it as foolproof as possible.
  • Integration As Per Test Plan – The integration of every module takes place as described in the test plan. This is done to reduce chaos and have a definitive path that needs to be followed in order to carry out testing effectively.
  • Checks Functionality – The aim behind Software Integration Testing is to guarantee a product that efficiently delivers on all that it promises. As such, at every level of assimilation, the software is rigorously tested to detect and eradicate all functional flaws.

Drawback Of Integration Testing

The main flaw in Integration Testing is that any scenario that is not covered in the test plan will be left untouched and as such, critical sources of errors and malfunctions might be overlooked. To be precise the success of Integration Testing lies in the perfection of the test plan. Since test plan is made by humans one needs to cater for its inefficiencies.

Need For Integration Testing

  • Usually, a software is developed by many individuals with each one handling a particular module. The way that each developer uses logic tends to differ and as such Integration Testing gives a platform to bring all the modules to perform as a complete software.
  • The interface between each module tends to amend or delete values. Such structural data change can be damaging to the software. Integration Testing gives a chance to detect and rectify such errors.


Software Integration Testing is a way to ensure that the complete software, when put together, works flawlessly. In case, the developer overlooked any critical aspect during the unit testing phase, then that is highlighted and in turn, it gives a chance to fix such errors before the final launch. After all, a flawless software is a successful software.