Testing Strategies

Testing Strategies

1. White Box/Structural Coverage

   • Internal structure of the system
   • Tests all logical paths through the software
   • Statement Coverge
     • One test for a straight path
     • Tests for every statement in the software e.g. if..for
   • Branch Coverage
     • Every possible path for each statement e.g. T or F
   • Condition Coverage
     • Every possible condition for each input variable
   • Data Flow Coverage
     • All possible paths data can follow e.g. defined-used, defined-killed

2. Black Box/Functional Coverage

   • Focuses on the functional requirements of the system
     • Given a certain input the correct output is produced
   • Validation
   • Tests are generated from the use cases
     • From this you come up with a set of inputs both good and bad
       • Bad: Too little data, invalid data
       • Good: Nominal data
     • Use Cases must be kept up-to-date for results to be accurate