What's the worst part about testing React components? Using the equivalent of fucking stone tools to do your component integration tests! We got errors with no context and errors with no stack trace, just spewing out bullshit! A sample:

The classic "Can't access .root on unmounted test renderer"

The unforgettable and ALWAYS visible "Warning: An update to YourShittyComponent inside a test was not wrapped in act(...)."

We do love it!