5.2) Use-Case-Based Test Case Generation

Question 1

Please list the criteria for the selection of use cases to be tested in detial.

Answer 1

• Value contribution: how much does this function contribute to the value chain?
• Usage frequency: how many users access the function and how often?
• Damage potential: what damage can result from unidentified errors in the function?
• Typical errors: which functions frequently contain errors in their implementation?
• Where are the typical weak points in comparable legacy or competitor systems?
• Required test coverage: what level of test coverage is actually required for the functional level?

Question 2

Please list the criteria for the required test coverage of functions of a use case.

Answer 2

• Instruction coverage: each function is accessed at least once.
• Branch coverage: each outgoing control flow is run through at least once.
• Condition coverage: each condition is evaluated at least once at TRUE and once at FALSE.
• Path test: each possible path through the use case is run through completely (“in one piece”), taking possible loops into account.