Add test.sh

tests/test.sh

+#!/bin/bash
+
+for filenm in $( ls *.sapl); do
+  lhs=${filenm%%.*}
+  bsapl="$lhs.bsapl"
+  out="$lhs.out"
+  exp="$lhs.exp"
+
+  if [ -e "$bsapl" ]
+  then
+    rm -f $bsapl
+  fi
+
+  if [ -e "$out" ]
+  then
+    rm -f $out
+  fi
+
+  `pwd`/../precompiler/precompiler.exe $filenm $bsapl
+  `pwd`/../interpreter/main $bsapl > $out
+  diff $exp $out > /dev/null || echo "$filenm different"
+done