Saturday, October 20, 2018
How can I get test coverage results to show more consistent results that make sense?
I earlier decided against having SimpleCov and test coverage badges in my Rails apps. It seemed that no matter how I configured SimpleCov, there were some glaring flaws in its results. However, I have since changed my mind as a result of working on a legacy Rails app that had very sparse test coverage when I first joined. SimpleCov showed only 25% test coverage. As a result, I've decided to make test coverage a standard part of all Rails apps I'm on. Test coverage metrics may have their flaws, but I figure that test coverage results should flag the parts of the test suite that need the most improvement.
So I've added test coverage to my new Ruby.MN app. The production site is at http://rubymn2.herokuapp.com/, and the source code is at https://github.com/jhsu802701/rubymn2 . Currently, the CodeCov badge shows 93% test coverage, and the results make sense to me.
What's going on? Why is there such a big discrepancy? How can I configure SimpleCov to show results that make more sense?
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