fix coverage

test-unittest.sh

@@ -5,6 +5,16 @@
 # stop on first error
 set -e
 
+rl="readlink -f"
+if ! ${rl} "${0}" >/dev/null 2>&1; then
+  rl="realpath"
+
+  if ! hash ${rl}; then
+    echo "\"${rl}\" not found!" && exit 1
+  fi
+fi
+cur=`dirname $(${rl} "${0}")`
+
 workers=${DOTDROP_WORKERS}
 if [ ! -z ${workers} ]; then
   unset DOTDROP_WORKERS