The tests results of a design technique (structural test) check the internal structure of the object, for example the execution of conditional branch instructions. Unit tests are often specified using specific techniques. For certain types of software, standards prescribe the technical design test structure to use.
In tests resulting from technical design black box test, the input data and expected results are not selected based on the internal structure, but the definition of the object. These tests are the most common among the functional integration testing and acceptance, but nothing prevents the use of these design techniques to define unit tests.
Design technique test structure (white box) is based on the analysis of the internal structure of the component or system. Design technique test (black box) functional or not, that is, not based on the analysis of the internal structure of the component or system.
Performance tests validate that the performances in the specification. Functional test checks that the required features are supported. Robustness test conducted by IT Solutions New Zealand professionals validates the stability and reliability of the software over time. Vulnerability testing assesses the integrity of software security.
A list of all the characteristics of a software has been established by the ISO 9126 standard. Outside the very specific case of very simple systems, it is impossible to exhaustively test software, because the number of possible configurations grows exponentially with the number of updates in different situations.
Although lower, it still remains prohibitive. Successful testing is therefore not possible to conclude the proper functioning of the software. However we try, heuristically, to ensure that if a bug is present, the test should highlight it, in particular requiring a good test coverage. Cover program points: each program point must have been tested at least once
Coverage program paths: each sequence of points possible in a program execution must have been tested individually at least once (not in general). Functional coverage: each business application functionality must be verified by at least one test case. If you want stronger assurances of proper functioning, you can use formal methods.
Libraries like JUnit tests in Java can facilitate writing unit tests by providing methods to verify the behavior of the program. Depending on the complexity of the software, overall audits may be necessary.
These involve project management and all aspects of the project, beyond the software itself (process, organization, training, change management). This activity is one that is performed at the beginning of the test phase.