unittest version

[Dr Dang]

Is there a specific version identifier that is set automatically when you 
specify the "-unittest" on the compiler comand-line?

Basically I want to do something like this ...

version(UNITTEST) {
    import junk.stuff;
}
void main() {
...
}
unittest {
    // uses junk.stuff module
}

This is so that the module junk.stuff is imported only if "-unittest" option 
was given. I know that I can certain give "-version=UNITTEST" option. But I 
was hoping that just giving "-unittest" option should turn on some "version" 
identifier.

--Dang