Qualitree provides white box testing services to its global clients to optimize their software applications and products using industry's best practices.
White box or code coverage analysis testing is a structural testing technique which improves code quality, preventing untested code from reaching end users. White-box testing not only verifies that the basic unit of code (class/ function/ procedure) behaves properly when appropriate input is given but also validates that unexpected inputs do not cause application crashes. White box testing helps to measure risk in conjunction with code criticality.
The white box testing techniques help in designing the test cases that:
- Exercise independent paths within a module or unit
- Exercise logical decisions on both their true and false side
- Execute loops at their boundaries and within their operational bounds
- Exercise internal data structures to ensure their validity
White Box Testing Techniques:
With over a decade of expertise in software testing, Qualitree recommends the following techniques as a part of the white box testing methodology.
Loop Testing
Loop testing exclusively focuses on the validity of the loop constructs. There are four classes of loops that are subject to testing as part of the white box testing methodology:
- Simple Loop
- Nested Loop
- Concatenated Loop
- Unstructured Loop
Branch Testing
Branch testing technique is a synonym of conditional testing or decision testing. It ensures that each possible outcome from the condition is tested at least once.
Data Flow Testing
It is a white box techniques in which it is validated how the data moves within the program code.
Control Flow Testing
Control flow testing is one of the most vital white-box testing techniques and hence gains the most weight age in our complete methodology. It is a structural testing strategy that uses the programs control flow as a model control flow favoring more but simpler paths over complicated but fewer paths.
The adequacy of the test cases is measured and reported with a metric called “coverage”. It is actually a measure of the completeness of the set of test cases. Various coverage methods that form the part of the entire white box testing methodology are:
- Statement Coverage
- Branch Coverage
- Condition Coverage
Basis Path Testing
The basis path white box testing technique helps in producing a logical complexity measure of procedural design and use this measure as an approach for outlining a basic set of execution path (basic set is the set of all the execution of a procedure).
It will ensure that each basic test will execute every statement at least once and ensures that each independent path through code is taken in a predetermined order.
The following basis path techniques are considered in the white box testing methodology:
- Flow Graph Notation
- Cyclomatic Complexity
- Deriving Test Cases
- Graph Matrices