Programming :: Bash Script For Cleaning Home Directories

Im running on Solaris 10 and I am trying to write a script that will look at all the directories in export.home and then grep for the those in passwd and will display the directories that don't have a password associated with them

Here is what I got so far but its not working.
#!usr/bin/bash
for i in 'ls /export/home'
do
test='getent passwd | grep $i'
if [ $test="" ]
then
echo "No Home Diectories Found $i"
fi
done

All this does is display what was listed in the export.home. What I want it to do is just display what was not found in password.