Restore unittests from history

unittests/groups-in-switch-with-id.svg

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg xmlns="http://www.w3.org/2000/svg"
+  xmlns:example="http://www.example.com/olfactory-feedback/0.1"
+  xmlns:xlink="http://www.w3.org/1999/xlink">
+<switch>
+ <foreignObject requiredExtensions="http://www.example.com/olfactory-feedback/0.1" x="0" y="0" width="1" height="1">
+  <example:odor xlink:href="#odor1423">
+  </example:odor>
+ </foreignObject>
+ <g id="dsfargeg">
+  <rect width="300" height="200" fill="green" />
+  <circle cx="200" cy="100" r="50" fill="yellow" />
+ </g>
+</switch>
+<defs>
+ <example:odor id="odor1423" fill="grape"/>
+</defs>
+</svg>