White box testing-basis path
engineering, basis path testing,
or structured testing, is a white
box method for designing test cases. The method analyzes the control
flow graph of a program to find a set of linearly independent paths of execution.
The method normally uses McCabe' cyclomatic complexity to determine the
number of linearly independent paths and then generates test cases for each
path thus obtained. Basis path testing guarantees complete branch coverage
(all CFG edges), but achieves that without covering all possible CFG paths—the
latter is usually too costly .Basis path testing has been widely used and
decision-to-decision path, or DD-path, is a path of execution (usually through a flow graph representing a program, such as a flow chart) between two
decisions. More recent versions of the concept also include the decisions
themselves in their own DD-paths.