fish-shell/doc_src/test.txt

\section test test - perform tests on files and text

\subsection test-synopsis Synopsis
 <tt>test [EXPRESSION]</tt>

\subsection test-description Description                                                                                                                             
                                                                                                                                                                          
Tests the expression given and returns true or false.                                                                                                           

- \c -h, \c Display this help
- \c -G, \c File owned by effective group ID
- \c -L, \c File is symlink
- \c -O, \c File owned by effective user ID
- \c -S, \c File is socket
- \c -a, \c Logical and 
- \c -b, \c File is block device 
- \c -c, \c File is character device 
- \c -d, \c File is a directory
- \c -e, \c File exists
- \c -f, \c File is regular 
- \c -f, \c File is set-group-ID 
- \c -k, \c File has sticky bit set 
- \c -n, \c String length is non-zero
- \c -o, \c Logical or
- \c -p, \c File is named pipe
- \c -r, \c File is readable
- \c -s, \c File size is non-zero
- \c -t, \c FD is terminal
- \c -u, \c File set-user-ID bit is set
- \c -w, \c File is writable
- \c -x, \c File is executable 
- \c -z, \c String length is zero

\subsection test-example Example

<pre>
    if test -d "/"
	echo "Fish is cool"
    end
</pre> 

Because "/" is a directory the expression will evaluate
to true, and "Fish is cool" will be echoed