The SVG files in this directory are used to verify that certain CSS constructs are processed properly. These "tests" are un-automated; you have to view each diagram with the example program svgtiny_display_x11 to see if they are rendered correctly. What is "correctly?" Each test should be simple enough that the correct behavior is not to hard for someone familiar with CSS to deduce. Hints may be given in the comment at the top of the file. Or, maybe you just open the same file in firefox and look at them side-by-side.