Forcing the test phase to be run by default in a Portfile?

[Frederick Akalin]

I want to have the test phase run automatically for a particular port
 because it is important to guarantee correctness for that port (in
 this case, I'm working with gmp).  I couldn't find a switch to do it;
 test.run only enables the test phase and does not have it run.  Is
 there an easy way to do this?

 Thanks!

 --
 Frederick Akalin