I am looking for a way to create a dummy OSM file so I can test icons and styles without actually adding them to the real OSM database. Let's say I'm working on a new icon, or a style rule, and want to run several tests to make sure the statements are correct and the icon looks good. Another use for such a file would be so I could see all my custom icons grouped close enough together to fit in one Basecamp screen shot.

Can anyone suggest how I might do this?
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