If you're writing unit tests for your React components these days, there's a good chance you're using React Testing Library. It supports user-focused testing with reliable selectors to find elements, such as the data-testid attribute or finding an element by role. Specific and reliable selectors are key to make sure …

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After I added the ability to collect and store code coverage stats in the Projektor test reporting tool, I wanted to also add a graph that showed the trend of code coverage over time. Then users could track their repo's code coverage to see if was increasing, decreasing, or staying the same. The Projektor UI is built …

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