Updated nbfi test suite, tests and a bit of refactoring

nbfi/test.sh

@@ -1,9 +1,29 @@
 #!/bin/bash
 
-for i in `ls test` ; do 
+for i in `ls test | grep -v fail` ; do 
     echo Running test $i:
     echo ---------------------
     bin/nbfi test/$i
+    return=$?
+    if [ $return != 0 ] ; then
+        echo Test $i failed.
+        exit 1
+    fi
+    echo
+    echo ---------------------
+    echo End of test $i 
+    echo
+done
+
+for i in `ls test/*fail*` ; do 
+    echo Running expected fail test $i:
+    echo ---------------------
+    bin/nbfi $i
+    return=$?
+    if [ $return != 127 ] ; then
+        echo Test $i failed.
+        exit 1
+    fi
     echo
     echo ---------------------
     echo End of test $i