Add vectorizer test cases

svg-flatten/testdata/svg/rect_xform.svg

@@ -0,0 +1,73 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="80mm"
+   height="100mm"
+   viewBox="0 0 80 100"
+   version="1.1"
+   id="svg8"
+   inkscape:version="1.0.2 (e86c870879, 2021-01-15, custom)"
+   sodipodi:docname="rect_xform.svg">
+  <defs
+     id="defs2" />
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.72380346"
+     inkscape:cx="7.5139508"
+     inkscape:cy="93.664958"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     inkscape:document-rotation="0"
+     showgrid="false"
+     inkscape:window-width="1920"
+     inkscape:window-height="1019"
+     inkscape:window-x="0"
+     inkscape:window-y="0"
+     inkscape:window-maximized="1" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title />
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <rect
+     width="100%"
+     height="100%"
+     fill="white"
+     id="rect5" />
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <g
+       id="g1260"
+       transform="matrix(0.39835601,0,0,0.39835601,22.49726,26.801125)"
+       style="stroke-width:2.51032">
+      <rect
+         width="104.30496"
+         height="97.649048"
+         id="foobar"
+         x="-89.525635"
+         y="-118.97292"
+         style="fill:#000000;stroke:none;stroke-width:0.0664187;stroke-linejoin:round;stop-color:#000000"
+         transform="matrix(-0.95222923,0.30538418,-0.11902797,-0.9928909,0,0)" />
+    </g>
+  </g>
+</svg>