As with most things chicken, it depends. As long as you don't have a broody setting on them, don't have extremes of temperature, don't have an egg eating predator or egg eating chicken, as long as the shells are hard and not cracked, they should be fine. I don't like to leave eggs in the coop overnight as I think it is attractive to egg eating predators, mainly rats but it could be something else. The longer you leave them in the coop, the more likely that one will accidentally get broken and help them become egg eaters. But as far as the egg going bad, if the temperature range is "normal", say between freezing and the low 70's, the eggs should be fine for 7 days.
If a hen has started laying, there is no guarantee that she is laying every day. They could have been out there more that seven days. If you want to get a feel for how fresh the eggs are, try to float them in water. If they float they are questionable, not necessarily bad but be careful. As an egg gets older, it loses moisture through the shell and the air sac gets larger. After a while the air sac gets so large that the egg will float. This test does not necessarily tell you which egg is good or bad, but I'd be a whole lot more suspicious of an egg that floats. If you do the float test, use water that is a little warmer than the egg. If you put an eggis water that is colder than the egg, the air sac will contract, creating a suction on the egg shell that can pull water into the egg. This water might have bacteria in it. And if you do the float test, refrigerate any egg you want to keep. When you get the egg wet, you will wash off the bloom, a coating the hen puts on the egg to keep bacteria out. It will still keep a long time in the frig but I would not store it at room temperature.
