Decision Coverage Testing

Decision Coverage Testing is a white box testing technique that measures the coverage of decision outcomes in code. It helps ensure that all possible decisions are accounted for in the testing process.

Syntax

There is no specific syntax for Decision Coverage Testing.

Example

Consider the following code snippet:

1) IF (a > b) AND (c > d)
2)  THEN
3)     X = Y
4) ELSE
5)     X = Z
6) END IF

Here, there is one decision point: IF (a > b) AND (c > d). To achieve 100% decision coverage, both the paths (i.e., "THEN" and "ELSE" blocks) must be executed at least once during testing.

Explanation

Decision coverage testing measures the coverage of decision outcomes in the code. For each decision point, all possible outcomes must be tested. This helps ensure that all possible scenarios are accounted for and that the code is fully functional.

Use

Decision coverage testing is useful in scenarios where the code has multiple decision points, and the results of those decisions have significant impacts on the flow of the code. For example, in financial applications, decision points may determine whether a transaction is approved or denied.

Important Points

• Decision coverage testing is a white box testing technique where the internal structure of the code is known and used to build tests.
• Testing all possible outcomes of a decision point ensures that the code is fully functional and all possible scenarios are accounted for.
• It is important to have a thorough understanding of the code and its functionality to perform effective decision coverage testing.

Summary

Decision Coverage Testing is a white box testing technique that measures the coverage of decision outcomes in the code. It is useful in scenarios where the code has multiple decision points, and the results of those decisions have significant impacts on the flow of the code. By ensuring that all possible outcomes of decision points are tested, decision coverage testing helps ensure that the code is fully functional and all possible scenarios are accounted for.