Verify the basic capability to handle the stroke properties ("stroke", "stroke-width", "stroke-linejoin") in
combination with the "rect" element. The pair should be rendered as two red rectangles without an interior fill.
The upper rectangle should have a stroke width of 5 with sharp corners. The lower rectangle should have a stroke
width of 5 with round corners.
The test uses the "rect" element, as well as basic "fill" (solid primary colors), "stroke", stroke="red"
stroke-width="10" stroke-linejoin="round", "font-family" (Arial) and "font-size" properties.
