[svnsets]

I still have no idea what the right way to test things is

At my company, we use cucumberjs (https://github.com/cucumber/cucumber-js) to write scenarios for basic front-end testing. I wouldn't go overboard and start writing test to measure padding or font sizes, but you can easily see isolated scenarios and write automated tests to simply verify that a react component actually put the right element in the dom or to check conditional class names.

We also unit test many of our Redux reducers which is pretty simple with any unit testing library. Just create an initial state and expected state, call the action creator, and deep compare the new state with the expected state.