Blue
Ravenous Bugblatter Beast of Traal
I would say "You're welcome.", but Catnap utterly fails to meet my criteria. It provides exactly 0 direct healing, making it NOT a healing spell under my criteria.
First, this isn't the criteria you originally wrote. I'll get back to that.
Second, this one is easily proven wrong. Goodberry provides healing, heck it even benefits from a life cleric that someone else was putting forth as a criteria. But the spell doesn't directly heal you at all. I don't target you witgh Goodberry and you regain HPs. So we know what you just wrote is not a valid criteria of judging if a spell heals.
Anyway, let's return to the original criteria since that's what I responded to:
If you have to engage something other than the spell in order to heal, that spell does not heal you and is not a healing spell.
From Catnap:
"[the] target gains the benefit of a short rest"
It doesn't "enable you to take a short rest", it gives you the benefits of it. Among the benefits of a short rest is healing.
Do you need to engage in anything else? Nope. Great, Catnap does provide healing.