I know that Cactus Language Training created this proficiency test to help them better place their prospective students, but it is a useful tool to find out where you are at.  As with all proficiency tests of this nature, it is not a complete picture of where you are at, but it can be helpful and will give you a basic idea of where you are at in general.  As a plug for Cactus Language Training, they seem to offer some great courses if you are in one of their locations.
link to turkish test