Add a test case that compares the sorted stl of the python c14n script vs. sort-stl (does not pass)

deterministic_tests.sh

@@ -101,3 +101,28 @@ rm -rf "${RANDOM_SEED}"
 
 #--export-format asciistl
 #--export-format binstl
+
+##############
+#  SORT-STL vs. C14N
+##############
+
+echo "sort-stl..."
+
+SORTSTL=$(mktemp -d)
+FIRST="${SORTSTL}/first.stl"
+SECOND="${SORTSTL}/second.stl"
+
+openscad -q -o "${FIRST}" --enable sort-stl scad/deterministic.scad
+openscad -q -o "${SECOND}" scad/deterministic2.scad
+python3 python/c14n_stl.py "${SECOND}"
+
+DIFF_VAL=$(diff "${FIRST}" "${SECOND}")
+
+if [[ "${DIFF_VAL}" == "" ]]; then
+	echo "Files are the same"
+else
+	#echo "${DIFF_VAL}"
+	echo "Files are different"
+fi
+
+rm -rf "${SORTSTL}"