### Some simple SVG gradient test cases

SVG radialGradient W3C spec example:
SVG MDN gradientTransform example (userSpaceOnUse radialGradient)
MDN radialGradient example (gradientUnits=objectBoundingBox)
MDN spreadMethod example:
Simple radialGradient gradientUnits=objectBoundingBox
radialGradient with non-centered focal point:
Linear gradient using percentages + inline CSS, gradientUnits=objectBoundingBox
Linear gradient using numbers, gradientUnits=objectBoundingBox
Linear gradient with gradientUnits=userSpaceOnUse using numbers
Linear gradient with gradientUnits=userSpaceOnUse using percentages
Linear gradient scaled by viewbox
Linear gradient with gradientTransform
Linear gradient + transform
Linear gradient + transform with fill-opacity
Stroke linear gradient + transform
Stroke linear gradient + transform with stroke-opacity