Black box testing is a strategy in which testing is based solely on the requirements and specifications. Unlike its complement, white box testing, black box testing requires no knowledge of the internal paths, structure, or implementation of the software under test (SUT).

The general black box testing process is:

1. The requirements or specifications are analyzed.
2. Valid inputs are chosen based on the specification to determine that the SUT processes them correctly. Invalid inputs must also be chosen to verify that the SUT detects them and handles them properly.
3. Expected outputs for those inputs are determined.
4. Tests are constructed with the selected inputs.
5. The tests are run.
6. Actual outputs are compared with the expected outputs.
7. A determination is made as to the proper functioning of the SUT

This entry was posted on Thursday, July 10th, 2008 at 9:24 pm and is filed under Software Testing.