Difficulties in Program Walkthrough

As testing should be done by someone else, some difficulties of a Program Walkthrough includes:

• cannot depend on human eyes
  
• Programmers would be reluctant
  
• difficulties in inviting external party
  
• resources

Structural Testing in SDLC

Continuing on the Structural Testing:

• More powerful form of test is Path Coverage
  
• This strategy ensures that all statements in the program are executed at least once and conditional statements are tested for both true and false cases
  
• The starting point is to derive a program flow graph
  
• A flow graph consists of nodes representing decisions and edges showing flow of control
  
• Tester must not be seduced into thinking that such testing is adequate
  
• Cyclomatic complexity is a measure of the program's control complexity. The data complexity is not taken into account
  
• Program fragments which are equivalent in function may not have the same cyclomatic complexities
  
• It is generally true that the # of paths through a program is proportional to its size. Thus, as modules are integrated into systems, it is unfeasible to use structural testing techniques.