Something about unit testing - After more than year!

It is importnat to understand what is a purpose of a unit test...
the prupose is to check only things that module (or component) is responsible of
example: if you have a toggle component like here:
code:

export function Toggle() {
  return (
    <label className="switch" role="toggle">
      <input type="checkbox" role="hidden-input" />
      <span className="slider round" />
    </label>
  );
}

you need to ask yourself: what is this thing responsible of? is it repsonsble for display nice slider and hide the real simple checkbox?
the answer is "yes", and this is exactly the thing you need to test: