How to pass an option containing a space to a package in LaTeX/XeLaTeX

When I declare an option containing a space, LaTeX/XeLaTeX eats it.

In the main .tex, I have :

\usepackage[test font]{test}

In my .sty file I have :

\DeclareOption*{\newfontfamily\testfont[Scale=1]{\CurrentOption}}
\Proce开发者_如何转开发ssOptions

But the Tex engine passes to the package testfont option and not test font.

So the question is how to pass the option containing the space to the package.

---

Protect it with braces

\usepackage[{test font}]{test}

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Try

\catcode`\ =11
\usepackage[test font]{test}
\catcode`\ =10

This is quite likely to fail, but the failure might be progress on what we have so far.