TexasCHLforum.com

Actually we have had a test case of sorts, shortly after Heller if I'm not mistaken. The following is done completely from memory:

I believe it was United States V. Dorosan and was heard in the 5th circuit court of appeals (Which covers Texas, Louisiana, and Mississippi). The good news is that this an unpublished opinion which by my understanding means that it set no precedent. Essentially the 5th circuit concluded that because the parking lot was used for the loading and unloading of mail it would be considered a sensitive place which Heller allowed for a ban on firearms. Additionally they also concluded that the Post Office's ban was legal because the post had constitutional authority to do so as the property owner. In essence we have had a test case, but it really doesn't count for much.