Wednesday, 3 October 2012

What is Modified Condition Decision Testing?

Modified Condition Decision Testing


Modified Condition Decision Testing requires a model of the source code which identifies decisions, outcomes, and the individual Boolean operands within the decision conditions. A decision is an executable statement which may transfer control to another statement depending upon the logic of the decision statement. A decision condition is a Boolean expression which is evaluated to determine the outcome of a decision. Typical decisions are found in loops and selections.

Test cases shall be designed to demonstrate that Boolean operands within a decision condition can independently affect the outcome of the decision.

For each test case, the following shall be specified:
- the input(s) to the component;

-   for each decision evaluated by the test case, identification of the combination of Boolean operands to be exercised by the test case, their values, and the outcome of the decision

- the expected outcome of the test case

2 comments:

  1. Great stuff. Keep up the good work. Decision Testing can be tricky but this breaks it down. Got your exam papers too. Worth the download for sure!

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  2. Modified condition/decision coverage Every point of entry and exit in the program has been invoked at least once, every condition in a decision in the program has taken on all possible outcomes at least once, and each condition has been shown to affect that decision outcome independently.

    A condition is shown to affect a decision's outcome independently by varying just that condition while holding fixed all other possible conditions. The condition/decision criterion does not guarantee the coverage of all conditions in the module because in many test cases, some conditions of a decision are masked by the other conditions. Using the modified condition/decision criterion, each condition must be shown to be able to act on the decision outcome by itself, everything else being held fixed. The MC/DC criterion is thus much stronger than the condition/decision coverage.

    Source

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