Black-Box Test Techniques

Because a black-box test has no knowledge of the inner workings of the test object, test cases are derived from (or, ideally, are already part of) the specifications. Because they are derived from specifications (i.e., requirements or system behavior), these techniques are also referred to as specification-based, or behavior-based. A complete test sequence that covers all possible permutations of input data values is impossible to perform. You have to select an appropriate set of test cases using the techniques outlined below.