Add print-cfg tests

tests/cfg/run.sh

@@ -0,0 +1,38 @@
+#!/bin/bash
+
+# Go to tests directory.
+cd $(dirname "$0")/..
+
+# The path to cton-util should be in $CTONUTIL.
+if [ -z "$CTONUTIL" ]; then
+    CTONUTIL=../src/tools/target/debug/cton-util
+fi
+
+if [ ! -x "$CTONUTIL" ]; then
+    echo "Can't fund executable cton-util: $CTONUTIL" 1>&2
+    exit 1
+fi
+
+declare -a fails
+
+for testcase in $(find cfg -name '*.cton'); do
+    annotations=$(cat $testcase | awk /';;;;'/ | awk -F ";;;;" '{print $2}' | sort)
+    connections=$("${CTONUTIL}" print-cfg "$testcase" | awk /"->"/ | sort)
+    if diff -u <(echo $annotations) <(echo $connections); then
+        echo OK $testcase
+    else
+        fails=(${fails[@]} "$testcase")
+        echo FAIL $testcase
+    fi
+done
+
+if [ ${#fails[@]} -ne 0 ]; then
+    echo
+    echo Failures:
+    for f in "${fails[@]}"; do
+        echo "  $f"
+    done
+    exit 1
+else
+    echo "All passed"
+fi