Add functional tests

test/gzip/test_gzip.sh

+TMP_FILE_1=/tmp/gzip.tmp.$$
+TMP_FILE_2=/tmp/gzip.tmp.$$
+
+cleanup()
+{
+	rm -fr /tmp/gzip.tmp* gzip*.zafl peasoup_exec*.gzip*
+}
+
+log_error()
+{
+	echo "FAIL: $1"
+	cleanup
+	exit 1
+}
+
+log_message()
+{
+	echo "$1"
+}
+
+log_success()
+{
+	echo "PASS: $1"
+}
+
+setup()
+{
+	echo "hello" > $TMP_FILE_1
+	echo "hello" > $TMP_FILE_2
+}
+
+build_zafl()
+{
+	gzip_zafl=$1
+	shift
+	$PSZ `which gzip` $gzip_zafl -c move_globals=on -c zafl=on -o move_globals:--elftables $*
+	if [ ! $? -eq 0 ]; then
+		log_error "$gzip_zafl: unable to generate Zafl version"	
+	else
+		log_message "$gzip_zafl: built successfully"
+	fi
+}
+
+test_zafl()
+{
+	LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$SECURITY_TRANSFORMS_HOME/lib/ $1 $TMP_FILE_1
+	if [ ! $? -eq 0 ]; then
+		log_error "$1: unable to gzip file using zafl"
+	fi
+
+	gunzip  ${TMP_FILE_1}.gz
+	diff $TMP_FILE_1 $TMP_FILE_2
+	if [ $? -eq 0 ]; then
+		log_success "$1: after unzipping, we get the same file back. yeah!"
+	else
+		log_error "$1: after unzipping, we get a diferent file"
+	fi
+}
+
+pushd /tmp
+
+setup
+build_zafl gzip.nostars.zafl
+test_zafl ./gzip.nostars.zafl
+cleanup
+
+setup
+build_zafl gzip.zafl
+test_zafl ./gzip.zafl
+cleanup
+
+log_success "all tests passed"
+