•
Looking at the program from an external point of
view and deriving test cases based on the specification.
•
The only criteria upon which the program is
judged is if it produces the correct output for a given input.
•
Impossible to write a test case for every
possible set of inputs and outputs
•
Some of the code may not be reachable without
extraordinary measures
•
Specifications are not always complete
McCabe’s Cyclomatic Complexity
•
Software metric
•
Developed by Tom McCabe (circa 1976)
•
Directly measures the number of linearly
independent paths through a program’s source code, taking into account the
various decision points
•
Independent of implementation language
