Add a simple tool for doing round-trip encode/decode tests.

scripts/encodedecodetest.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+set -e
+tmp=/tmp/$$
+srcfile=$tmp.src.img
+fluxfile=$tmp.flux
+destfile=$tmp.dest.img
+format=$1
+
+trap "rm -f $srcfile $fluxfile $destfile" EXIT
+
+dd if=/dev/urandom of=$srcfile bs=1M count=2
+
+./fluxengine write $format -i $srcfile -d $fluxfile
+./fluxengine read $format -s $fluxfile -o $destfile
+if [ ! -s $destfile ]; then
+	echo "Zero length output file!"
+	exit 1
+fi
+
+truncate $srcfile -r $destfile
+if ! cmp $srcfile $destfile; then
+	echo "Comparison failed!"
+	exit 1
+fi
+exit 0
+