Tcl has long traditions in testing [[put in some general-purpose testing reference here--Beizer, ...]].  Especially notable are [Expect].  Oracle,
Sybase [http://www.usenix.org/publications/library/proceedings/tcl96/grady.html],
NASA, and other projects. Please document success stories and information on how Tcl has been used and can be used to build a working
test environment.

And don't forget about the [tcltest] package, which includes both 
documnetation and a huge set of examples (The Tcl and Tk test suites).


[Jacks]
is a Java compiler testing framework that was developed for
open source Java compiler projects because the official Sun 
development kits have not been released.  Jacks rivals the
Sun kits in capability, and may soon even have the same
number of compatibility tests.

----

In response to a question about testing C and Java
from Tcl, [Cameron Laird] responded eloquently.

Tcl is the single most successful language for test
automationof the kind you're describing.  That's so
undeniable that I'd forgotten it deserves to be 
documented for new generations of developers.  
[DejaGnu] is the testing
framework that's made gcc possible.  Companies like
Oracle and Sybase have MILLIONS of lines of Tcl testing 
code on which they rely to assure the operation
of their "flagship" products. 

Given enough motivation, I could do a whole book on
use of Tcl in testing.  Tcl tests automobile engines,
emergency telephone circuits, chemical sensors,
microprocessors, rocket components, industrial ovens,
and much, much more.  In the absence of any other
knowledge, ANY software project should think of Tcl
as its first choice for testing.

What more do you need?  


----



Articles:
   * Michael J. Norton's "Network Test Automation ..." [http://www.oreillynet.com/pub/a/mac/2001/10/26/tcl_osx.html]
   * [Arjen Markus]' ...
   * ...
   * [[Android, ...]]
   * ...