Testing www/chromium before installing

[bob prohaska]

After a _very_ long time www/chromium finished compiling on a
Pi3B+. I'd like to test it before installing, since I have a
(mostly) working version in /usr/local/bin and don't want to
overwrite it until I know the new version works at least as
well as the old one. 

Poking around in the source tree didn't disclose any obvious 
executable, could somebody offer a hint at test methods, if any?

Thanks for reading,

bob prohaska