What Is Incremental Testing and What Are Its Forms?

Software testing company hires the employees who have high professional skills and deep knowledge in their domain field and specialty.

The qualified specialists are familiar with all specifics of the different testing types. Either penetration testing, exploratory testing, reliability testing or installation testing – the specialist will perform it at a high level.

If a tester copes with such type of testing as integration testing, then he will have no problems with incremental testing. The reason of this lies in the fact that these two types of checking are executed the similar way.

During incremental testing, each element of the system is verified separately. Fulfilling such software testing, the specialist achieves the quick and direct results of the developers’ work.

Incremental Testing Types:

  • vertical;
  • horizontal.

The main advantage of incremental testing is the opportunity to uncover the reasons for the one or another bug’s occurrence in detail, as the location is strictly determined.

What Are the Vertical Incremental Testing Strategies?

  • “Top-down” testing begins with the user’s network checking. Then the low levels of the system with the usage of the stubs for the components work simulation of the lower level are checked.
  • With the help of “down-top” testing the low system levels are tested firstly. Thus, system work testing is executed in the bottom-up direction. In the case, when the top level components are not still completely developed, the drivers are used for checking. There is a so-called stub.

If the stubs and drivers are used simultaneously during system testing, then such checking is called “sandwich incremental testing”.

But still, incremental testing has its disadvantages. A time necessity is one of them as the stubs and the drivers, firstly, need to be developed and only then to be used for testing.