Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
Fasting in a dream indicates a vow, repentance, health, and a baby boy. Whoever sees himself fasting will gain high status and honor. Breaking the fast indicates illness or travel.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
Fasting indicates payment of debt and removal of worry. Whoever sees himself breaking the fast intentionally is backbiting people or committing a sin.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
Fasting is interpreted as health and wellness. Whoever sees himself fasting perpetually is avoiding sins.