Added testsvg script

test/testsvg

@@ -0,0 +1,51 @@
+#!/bin/sh
+
+IMAGEDIFF=./imagediff
+
+OUTDIR=testsvg-output
+REFDIR=testsvg-reference
+DIFFDIR=testsvg-diff
+IMAGELIST=testsvg-imagelist
+
+if [ $# -lt 1 ]; then
+	argv0=`basename $0`
+	echo "Usage: $argv0 file.svg [...]" >&2
+	exit 1;
+fi
+
+mkdir -p $OUTDIR
+mkdir -p $DIFFDIR
+rm -f $IMAGELIST
+
+err=0
+for svg in $@; do
+	svgbase=`basename $svg`
+	png=${svgbase/\.svg/.png}
+	outpng=$OUTDIR/$png
+	refpng=$REFDIR/$png
+	diffpng=$DIFFDIR/$png
+#	if xsvg $svg -p $outpng ; then
+	if svg2png $svg $outpng ; then
+		if [ -e $refpng ]; then
+			if diff $refpng $outpng > /dev/null; then
+				echo "Rendering of $svg matches." >&2
+			else
+				echo "ERROR: Rendering of $svg differs from reference image." >&2
+				$IMAGEDIFF $refpng $outpng > $diffpng
+				echo $refpng $outpng $diffpng >> $IMAGELIST
+				err=$(($err+1))
+			fi
+		else
+			echo "WARNING: No reference file found for $svg (looked in $refpng)" >&2
+		fi
+	else
+		echo "ERROR: Failed to render $svg" >&2
+		err=$(($err+1))
+	fi
+done
+
+if [ $err -gt 0 ] ; then
+	echo "Differences found in $err renderings."
+else
+	echo "All renderings matched reference images."
+fi