Functional Testing Service: Determination of Functional Criteria
Functional test is a key testing criterion for the software industry. It first of all provides the control over compliance with requirements established by the customer for the software product. As the requirements are formulated to the product as a whole, they reflect the interaction of the application under test with the environment. Functional testing is a black box test design technique that verifies something which function is invisible. The problem of functional testing is, above all, the labor intensity; so functional testing service is to be provided only by highly qualified specialists. The fact that the documents which specify the software requirements (Software requirement specification, Functional specification, etc.) are usually quite bulky, however, the corresponding checks must be comprehensive.
Below are the individual types of functional criteria.
- Testing of specification document items – a set of tests together should provide a review of each testable item at least once.
Requirements specification can contain hundreds or thousands of requirements items to a software product and each of these requirements should be checked for compliance with the criterion by running at least one test on them all, one at a time.
- Testing of classes of input data – this whole set of tests must provide verification of a representative of each class of input data at least once.
Functional testing services are used to verify that each aspect of the app functions in accordance with the requirements specification.
When creating tests, classes of input data are compared with the modes of use of the component under test or subsystem of the application, which significantly reduces the sorting options considered in the development of test sets. Note that selecting values of the input variables in accordance with the criterion (for example, such as different files – incoming data sources), we have to resort to powerful and efficient test sets. Indeed, along with restrictions on the input values, there are restrictions on the various combinations of the input values. Also there is a necessity to check system response to occurrence of errors in the values or structures of the input data. The consideration of this diversity is actually a laborious process, which creates difficulties for the application of the criterion.
Performance testing service should be considered when facing performance bottlenecks in the source code.