My book tell to add PHPUnit path to Global Include Path in Netbeans, but its use out of date PEAR way.
I installed PHPUnit using composer global require "phpunit/phpunit xxx". I run this command right in c:\
I got main PHPunit directory in: C:\Users\xxx\AppData\Roaming\Composer\vendor\phpunit
and two files in:
C:\Users\xxx\AppData\Roaming\Composer\vendor\bin