Do you remember the famous tweet:
QA Engineer walks into a bar. Orders a beer. Orders 0 beers. Orders 999999999 beers. Orders a lizard. Orders -1 beers. Orders a sfdeljknesv.— Bill Sempf (@sempf) 23 September 2014
This applies not only to code QA, but to the design in general too. Any creative design-to-be-coded should contain not only standard values, but the values that are extreme. For example, titles too short, titles too long, missing copy and so on. Also, all text in Photoshop should be set as paragraph boxes so that developers can see the boundaries.
I remembered, this (and way way more) was already told in another famous piece, PPP or Pixel Perfect Precision:
I have read and re-read and recommended PPP to others many times, but looking at it again, I have nothing else to add really. If you haven’t seen PPP, go get it now.