The purpose of Regression testing is to clearly reassure whether the updated code had adverse effects on the newly updated code or existing features whereas in the functional type of testing or black box testing, a functionality or code undergoes a microscopic examination in order to maintain a standard quality.
The regression testing is used to test an already developed end product is tested on a repeated basis restricting to a certain area that was updated whereas in the latter's case the testing is done on the individual functionalities or modules as a whole.
The Regression testing is required only in certain conditions when:
An operation undergoes functionality testing only when:
The techniques used in Functional testing are specific and are as follows:
In Regression testing type, the researchers have reported several types of techniques. These are as follows:
The functional testing sticks to strict process that firstly the project requirements are understood by the tester. Next, the inputs of the data are identified. Post the identification of input values, they are computed against the expected or resulting outcomes. It is compared with the selected input values. The test is concluded after the actual result is matched with the expected outcomes. Any discrepancy found, will lead to occurrence of a bug or defect.
On the contrary, the process of Regression testing type is entirely different as this activity takes place only when a program is modified. In this context, the selection of a relevant of test cases from the initial test is done. It is done in the later stages when the build is ready to go live.
The activities involved in this type of testing are as follows:
The types of Functional test cases are:
The types of Regression case are:
Both these types of testing are entirely differentiate from one another in all aspects. Also, the testers need to perform such test at different stages of the project. The comparison between the two is futile as the two of these testing are entirely different from each other.