I'd think it's always a good idea, no one minds when there are easy to run unit tests included in the open source project that they just downloaded. However, de

I'd think it's always a good idea, no one minds when there are easy to run unit tests included in the open source project that they just downloaded. However, depending on time restraints, timing, financial concerns, scale, dealing with critical systems, etc, it may or may not be better to push something out without having any formal tests. I think some form of formal testing should be pursued in general.