test/functions.source: fixed Darwin (macosx) bug in real_path()

test/functions.source

@@ -347,12 +347,22 @@ extendedTest()
 # real_path - report the absolute path to a file
 real_path ()
 {
+	if [ "$PLATFORM" == "Darwin" ]; then
+		if [ -d "$1" ]; then	
+			cd "$1"
+			echo $PWD
+		else
+			cd $(dirname $1)
+			echo "$PWD"/$(basename "$1")
+		fi
+	else
 		which realpath 2>/dev/null >/dev/null
 		if [ $? == 0 ]; then
 			realpath "$1"
 		else
 			readlink -f "$1"
 		fi
+    fi
 }
 
 copyVideoFiles ()