Verify correct operation of the five compositing modes of the feBlend filter primitive. Five text strings blended into a gradient, with one text string for each of the five feBlend modes. The string indicates the blend mode.

The rendered picture should match the reference image exactly, except for possible variations in the labelling text (per CSS2 rules).

The test uses a nested 'svg' element, 'text' element, the 'enable-background' property, and linear gradients.as well as basic fill (solid primary colors), stroke (solid primary colors with stroke-width lines), font-family (Helvetica) and font-size properties.