Can estimate coverage of automated tests

I ma having some end-to-end tests with Protractor for Angular forms, and I was struggling to find a good tool for coverage in this case. I mean I have been using Jasmine and it has Istanbul, but Protractor has not coverage estimating tool. Is there any you could suggest? I know it is not very important to measure coverage n end-to-end but I am having some comparisons with other tools so I need it. I tried this enter link description here but I didnt get any result from this tool. Any better idea? Thanks,