mcdcinfo - Collect modified condition/decision coverage information for model object

Syntax

Description

coverage = mcdcinfo(cvdo, object) returns modified condition/decision coverage (MCDC) results from the cvdata object cvdo for the model component specified by object.

coverage = mcdcinfo(cvdo, object, ignore_descendants) returns MCDC results for object, depending on the value of ignore_descendants.

[coverage, description] = mcdcinfo(cvdo, object) returns MCDC results and text descriptions of each condition/decision in object.

Input Arguments

cvdo	cvdata object
ignore_descendants	Logical value specifying whether to ignore the coverage of descendant objects 1 — Ignore coverage of descendant objects 0 — Collect coverage for descendant objects
object	The object argument specifies an object in the Simulink model or Stateflow diagram that receives decision coverage. Valid values for object include the following: Object Specification Description BlockPath Full path to a model or block BlockHandle Handle to a model or block slObj Handle to a Simulink API object sfID Stateflow ID sfObj Handle to a Stateflow API object {BlockPath, sfID} Cell array with the path to a Stateflow chart or atomic subchart and the ID of an object contained in that chart or subchart {BlockPath, sfObj} Cell array with the path to a Stateflow chart or atomic subchart and a Stateflow object API handle contained in that chart or subchart [BlockHandle, sfID] Array with a handle to a Stateflow chart or atomic subchart and the ID of an object contained in that chart or subchart

Output Arguments

coverage

Two-element vector of the form [covered_outcomes total_outcomes]. coverage is empty if cvdo does not contain modified condition/decision coverage results for object. The two elements are: covered_outcomes Number of condition/decision outcomes satisfied for object total_outcomes Total number of condition/decision outcomes for object

description

A structure array containing the following fields: text String denoting whether the condition/decision is associated with a block output or Stateflow transition condition.text String describing a condition/decision or the block port to which it applies condition.achieved Logical array indicating whether a condition case has been fully covered condition.trueRslt String representing a condition case expression that produces a true result condition.falseRslt String representing a condition case expression that produces a false result

Examples

Collect MCDC coverage for the slvnvdemo_cv_small_controller model and determine the percentage of MCDC coverage collected for the Logic block in the Gain subsystem:

mdl = 'slvnvdemo_cv_small_controller';
open_system(mdl)
testObj = cvtest(mdl)                      %Create test specification object
testObj.settings.mcdc = 1;                 %Enable MCDC coverage
data = cvsim(testObj)                      %Simulate model
blk_handle = get_param([mdl, '/Gain/Logic'], 'Handle');
cov = mcdcinfo(data, blk_handle)           %Retrieve MCDC results for Logic block
percent_cov = 100 * cov(1) / cov(2)        %Percentage of MCDC outcomes covered 

Alternatives

To collect MCDC coverage for a model:

1. Open the model.

2. In the Model Editor, select Tools > Coverage Settings.

3. On the Coverage tab, under Coverage Metrics, select MCDC Coverage.

4. On the Results and Report tabs, select the desired options.

5. Click OK to close the Coverage Settings dialog box.

6. Simulate the model and review the MCDC coverage in the report.

See Also

complexityinfo | conditioninfo | cvsim | decisioninfo | getCoverageInfo | sigrangeinfo | sigsizeinfo | tableinfo

How To

• Modified Condition/Decision Coverage (MCDC)
• MCDC Analysis

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