Verify that interpreter/viewer has basic capability to handle the 'rect' shape element. Four pairs of rectangles should be displayed in the four quadrants, with the shapes in each pair being identical to each other. Filling, stroking, and filling-plus-stroking are tested, as are the round-rect attributes.
The rendered picture should match the reference image, except for possible variations in the labelling text (per CSS2 rules).
This test uses 'text' and 'path' elements, as well as fill (solid primary colors), stroke (primary colors and wide lines), font-family ("Helvetica"), and font-size properties within the 'style' attribute.