How to create a .cvf file to exclude external m-files from coverage report?

Hi, I'm trying to exclude external m-files coverage from coverage report in Simulink Test. I tried creating coverage filter file refering to https://in.mathworks.com/help/slcoverage/ref/slcoverage.blockselector-class.html

I'm trying to exclude mutiple functions from coverage. Below is my edited script for it.

files = dir('*.m');
for i = 1:length(files)
    selector = slcoverage.BlockSelector(slcoverage.BlockSelectorType.BlockInstance, files(i).name);
    filt = slcoverage.Filter;
    rule = slcoverage.FilterRule(selector, '', slcoverage.FilterMode.Exclude);
    filt.addRule(rule);
end
setFilterName(filt,'MFileExclusion');
save(filt,'MFileExclusion')

I tried adding this cvf file to Simulink Test, but its not working. I'm using R2024a.

Is there an issue with the script? Is there any alternate solution here?

Thanks in advance.

Answer 1

[Satyam]

Hi Shardul,

The issue is that the filter you create is overwritten in every loop iteration and the .cvf file is not saved correctly. You should create the filter once, add multiple rules to it, and then save it. Also ensure the selector correctly references the model objects you want to exclude.

You can modify the script like this:

files = dir('*.m');

filt = slcoverage.Filter;

for i = 1:length(files)

selector = slcoverage.BlockSelector( ...

slcoverage.BlockSelectorType.BlockInstance, files(i).name);

rule = slcoverage.FilterRule(selector,'',slcoverage.FilterMode.Exclude);

filt.addRule(rule);

end

setFilterName(filt,'MFileExclusion');

save('MFileExclusion.cvfilter','filt');

You can refer to the following documentation for correct usage of coverage filters: https://www.mathworks.com/help/slcoverage/ref/slcoverage.filter-class.html

I hope it resolves your query.