title: Difference between splitChunks.chunks and splitChunks.test (webpack)
body: <p>Can anyone explain to me the difference between the splitChunks.chunks setting and the splitChunks.cacheGroups.{cacheGroup}.test setting in Webpack's SplitChunksPlugin? Especially if they're both used in a single cache group.</p>
  
  <p>The documentation isn't very helpful in this regard, so help is appreciated</p>