Winter’11(20.0.0) Force.com Plugin/IDE users stumbled upon “no debug logs” issue on running unit tests. The problem is well stated below in this community thread

There are many similar community threads on force.com discussion boards around the same issue “No Debug logs” issue.
How to fix this ?
This issue poped because of a bug in winter’11(20.0.0) Force.com IDE. The Force.com IDE team released an IDE update(20.0.1) on November 15, 2010 that addresses this issue. More details in screen shot below and IDE release notes page here.

So, to get rid of this issue, just update your Force.com IDE via this update site : http://www.adnsandbox.com/tools/ide/install/
Comments (4)
Anonymoussays:
January 4, 2011 at 9:29 amThis fix is still not available for Helios plugin. See the screenshot below. Wondering when this will be available.Galileo – http://twitpic.com/3mwxg9Helios – http://twitpic.com/3mwxg4
Anonymoussays:
January 4, 2011 at 9:42 am@Oxene, I am on Helios and Force.com IDE update 20.0.1 with bug fix is installed on it. See this screenshot : http://screencast.com/t/m7BhqIbHKdVdI'm wondering why your eclipse is not pulling the update.
Anonymoussays:
January 4, 2011 at 11:12 amUninstalled the plugin, deleted the update site from the list of sites, added it again and then tried an install. The fixed version showed up.Ran into a couple of problems, but fixed at last.
Anonymoussays:
January 4, 2011 at 11:20 amStrange, I forget what steps I followed to update the IDE. I usually do “Help > Check for Updates”