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How to Test a React Component
I prefer to have most of my tests render higher up in the tree than test a button component. I don't mind having really big components that are covering a lot of ground. When you start testing in a new project, the first test should be an end-to-end test, 100%. And then the second test should be a low-level unit test,. Just so that you can get those tools set up and then you fill in the middle with integration tests.