[ELECTRON] Shell Scripting help? "test: [-d: unary operator expected"

[Ben Rush]

Im trying to check if a series of directory exists and if not create them,
and am having issues. All the instances of test return with the error "test:
[-d: unary operator expected" . Searching around I see that if the variable
is in double quotes its solves the problem - but for some reason, not for
me. The script still makes the directories if the don't exists, however if
they DO - it still tries to create them.

What noob things am I doing wrong here?

This is just one small but of my puzzle - if there is anybody knowledgeable
in shell scripting that could give me a few hours to in the next day or so -
I'd be happy to pay for your time.

Cheers,
Ben Rush

[code]
#!/bin/bash
location_Parent=~/Documents/sight_of_sound
location_IMG=~/Documents/Sight_of_sound/IMG
location_AUD=~/Documents/Sight_of_sound/AUD

if test [-d "$location_Parent"]
then
echo "Parent Directory OK"
else
    echo "Error: Parent directory does not exist. Creating directory"
    mkdir $location_Parent
fi

if test [-d "$location_IMG"]
 then
    echo "IMG Directory OK"
else
    echo "Error: IMG directory does not exist. Creating directory"
    mkdir $location_IMG
fi

if test [-d "$location_AUD"]
then
    echo "AUD Directory OK"
else
    echo "Error: AUD directory does not exist. Creating directory"
    mkdir $location_AUD
fi
[/code]
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