Are these edible sunberries, or something poisonous?

I found these berries in my mom's California garden.  My mom said she sprinkled some wildflower seeds in this section earlier this year.  Since she's never grown any berries before, I have to rule out self-seeding volunteers.  So I guess these berry plants grew from seeds mixed in with the wildflowers, or they are just part of random weeds in the garden.

When these plants were growing, I thought they kind of looked like something in the solanum family (like peppers), but being a first-year gardener, my botanical knowledge was/is rather limited.  Now they are bearing berries slightly smaller than blueberries.  I remember seeing a post from The Ottawa Gardener where she talked about sunberries, which are edible, and also mentioned (in the comment section) that they are a lot similar to other wild solanum berries which may be poisonous.

Do any of my more experienced readers have an idea on what we may have here?  I'll post a few more pictures.

Here's they are, growing amongst some other random wildflowers.  The tall skinny plant in the middle with narrow leaves is something else, not part of this berry plant.

The tallest part of the berry-bearing plant seems to be no more than 2 feet or so.

This plant is less than a foot tall, but still has berries on them.

By the way, curiosity got the better of me and I ate a few of these berries.  About a dozen, to be exact.  My mom told me not to eat them, since I didn't know if they were poisonous.  So what did I do?  I first squeezed a berry (very easy, since these were slightly softer than a ripe blueberry), and tasted a tiny bit of the juice with the tip of my tongue - as if I would be able to tell what a poisonous berry tastes like.  And it tasted fine.  Not sweet like a super sweet blueberry, but not at all tart like some blueberries can be.  Sort of a mildly sweet berry with no tartness at all.  So I yelled out to my mom "it tastes okay!" and ate the rest in my hand.

That was about 30 minutes ago.  I'll let you know if I'm still alive tomorrow.