Integration Testing

Integration Testing

Unit and Integration Testing is essential part of almost any integration process. Customers cannot afford losing time or money over poor performing systems. This is increasingly true as the popularity for on-demand services increase - scalability, availability, reliability and performance is essential. One incorrectly functioning component in your software could inadvertently affect the behavior of another component and, if undetected at a later stage of development, could lead to serious issues with the delivery.

This highlights the need for an in-depth system-level analysis to be completed before moving to the next step in the quality assurance lifecycle. This calls for detailed system or integration testing which is the process of ensuring individual functional areas play nicely together. It is conducted in order to verify a component’s ability to operate as expected with other components within the same environment, and is performed after unit testing in the testing life cycle. The Unit and Integration Testing Service provided by IT Division Inc. takes an in-depth look at the nature of your software and its behavior around other components. As a result, the application is tested in order to verify that it meets the standards set by the client as well as reassuring the development team that assumptions which were made during unit testing are correct.

The Integration Testing at IT Division Inc. can be catered for within a wide range of organizations and environments. During system testing, we focus solely on the outputs generated in response to inputs provided and execution conditions, rather than verifying the internal structure of the program/ system. We target and achieve a higher level of coverage so that we can isolate major constraints early on in application testing, providing a high level of quality assurance and cost effectiveness to aid the successful delivery of your project.

The IT Division Inc. Advantage

  • Gain confidence in your system: Let IT Division Inc. deploy its proven integration testing methodology to find quickly identify failure points.
  • We're experts in integration testing and will quickly determine ideal integration testing approach for your systems.
Some of the integration testing approaches we employ are

Big Bang Approach Advantages:
  • Convenient for small systems.
  • First all the modules are individually tested.
  • Next all those modules are put together to construct the entire system which is tested as a whole.
  • Quick and Cheap.
  • No Drivers, Stubs, Harness or Mock objects are needed.
Incremental Approach Advantages

Top-down Testing
  • Advantageous if major flaws occur toward the top of the program
  • Once the I/O functions are added, representation of test cases is easier.
  • Critical Modules are tested on priority; major design flaws could be found and fixed first.
  • The SIT engineers continually observe system-level functions as the integration process continue.
  • Isolation of interface errors becomes easier because of the incremental nature of the top-down integration.
Bottom-up Testing
  • Advantageous if major flaws occur toward the bottom of the program
  • Test conditions are easier to create.
  • No time is wasted waiting for all modules to be developed unlike Big-bang approach.
  • Each component and unit is tested for its correctness then it goes for further integration.
  • It makes a system more robust since individual units are tested and confirmed.
Sandwich Testing
  • In this approach a system is integrated using a mix of top-down, bottom-up, and big-bang approaches.
  • A hierarchical system is viewed as consisting of three layers.
  • A specific approach is employed to test each of these three layers.
  • Useful for very large projects having several subprojects.