Restore unittests from history

unittests/css-reference.svg

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+
+<defs>
+	<linearGradient id="g1">
+		<stop offset="0" stop-color="red"/>
+		<stop offset="1" stop-color="blue"/>
+	</linearGradient>
+	<linearGradient id="g2">
+		<stop offset="0" stop-color="green"/>
+		<stop offset="1" stop-color="yellow"/>
+	</linearGradient>
+</defs>
+<style type="text/css"><![CDATA[
+	rect {
+		stroke: red;
+		stroke-width: 10;
+		fill:url(#g1)
+	}
+]]></style>
+
+<style type="text/css">.circ { fill: none; stroke: url("#g2"); stroke-width: 15 }</style>
+
+<rect height="300" width="300"/>
+<circle class="circ" cx="350" cy="350" r="40"/>
+
+</svg>