Using .cls macros in the typesetting of the .dtx from which .cls is generated

Question

I read some advice suggesting that when writing a package, one should use that package in one's dtx file in order to demonstrate the use of macros and environments. Presumably, the same should be true when writing a class, but I'm encountering the issue of not knowing how to actually do this. Attempting to stick \LoadClass{\jobname} (or even \LoadClass{democls} assuming the file is named democls.dtx) leads to a two \LoadClass commands error. (Note: I don't think my question is a duplicate of Is it possible to extract a .cls from a .dtx and avoid the Two \LoadClass commands error? because it doesn't seem like that question addresses directly using macros and environments defined by the class in the typesetting of the class documentation. I am basing my democls on the same Joseph Wright model dtx file, though.)

% \iffalse meta-comment
%<*internal>
\iffalse
%</internal>
%<*internal>
\fi
\def\nameofplainTeX{plain}
\ifx\fmtname\nameofplainTeX\else
  \expandafter\begingroup
\fi
%</internal>
%<*install>
\input docstrip.tex
\keepsilent
\askforoverwritefalse
\preamble
(preamble)
\endpreamble
\postamble
(postamble)
\endpostamble
\usedir{tex/latex/democls}
\generate{
  \file{\jobname.cls}{\from{\jobname.dtx}{class}}
}
%</install>
%<install>\endbatchfile
%<*internal>
\usedir{source/latex/democls}
\generate{
  \file{\jobname.ins}{\from{\jobname.dtx}{install}}
}
\ifx\fmtname\nameofplainTeX
  \expandafter\endbatchfile
\else
  \expandafter\endgroup
\fi
%</internal>
%<*class>
\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{democls}[2015/07/07 v1.0 description text]
%</class>
%<*driver>
\documentclass{ltxdoc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\begin{document}
  \DocInput{\jobname.dtx}
\end{document}
%</driver>
% \fi
% 
%\GetFileInfo{\jobname.cls}
%
%\title{^^A
%  \textsf{democls} --- description text\thanks{^^A
%    This file describes version \fileversion, last revised \filedate.^^A
%  }^^A
%}
%\author{^^A
%  You\thanks{email: you+obfuscation@your.domain}^^A
%}
%\date{Released \filedate}
%%
%\maketitle
%
%\DescribeMacro{\examplemacro}
% Some text about an example macro called \cs{examplemacro}, which
% might have an optional argument \oarg{arg1} and mandatory one
% \marg{arg2}. It looks like \examplemacro{foo}{bar}.
%
%    \begin{macrocode}
%<*class>
%    \end{macrocode}
%
%    \begin{macrocode}
\LoadClass{article}
%    \end{macrocode}
%
%\begin{macro}{\examplemacro}
%    \begin{macrocode}
\newcommand{\examplemacro}[2][]{%
  \textit{#1 #2}
}
%    \end{macrocode}
%\end{macro} 
%
%    \begin{macrocode}
%</class>
%    \end{macrocode}
%\Finale

edit: If anyone cares to make use of the finished templates, they're available at https://github.com/RyanMatlock/LaTeX-dtx-templates.