#if preprocessor directive for directives other than DEBUG

It’s the same as for DEBUG, assuming that you’ve defined a build configuration that lists TEST in the “Conditional compilation symbols” text box (under project properties > Build tab; this is a space-delimited list).

For code that you only want to run in the TEST build configuration:

#if TEST
// ...
#endif

And for code you don’t want to run in the TEST build configuration, you can either #else the above, or do this:

#if !TEST
// ...
#endif