Phần mềm-Ứng dụng

Designing test cases using the error guessing approach is based on the tester’s/developer’s past experience with code similar to the code-under-test, and their intuition as to where defects may lurk in the code. Code similarities may extend to the structure of the code, its domain, the design approach used, its complexity, and other factors. The tester/developer is sometimes able to make an educated “guess” as to which types of defects may be present and design test cases to reveal them. Some examples of obvious types of defects to test for are cases where there is a possible division by zero, where there are a number of pointers that are manipulated, or conditions around array boundaries. Error guessing is an ad hoc approach to test design in most cases. However, if defect data for similar

code or past releases of the code has been carefully recorded, the defect types classified, and failure symptoms due to the defects carefully noted, this approach can have some structure and value. Such data would be available to testers in a TMM level 4 organization.