The emoji should wrap within the box in both cases:

abcde fghij klmno pqrst uvw xyz 😀😁😂😃 😄😅😆😇 😈😉😊😋 😌😍😎😏 abcdefghijklmnopqrstuvwxyz 😀😁😂😃😄😅😆😇😈😉😊😋😌😍😎😏