--- /dev/null
+#!/bin/sh -ex
+
+dotest() {
+ src=$1
+ desti=$2
+ destdn=$3
+ n=$4
+
+ touch ./$src/src$n
+ touch ./$desti/desti$n
+ ln ./$desti/desti$n ./$destdn/destdn$n
+
+ mv ./$src/src$n ./$destdn/destdn$n
+}
+
+
+# srcdn=destdn=desti
+dotest 'a' 'a' 'a' 1
+
+# destdn=desti
+dotest 'b' 'a' 'a' 2
+
+# srcdn=destdn
+dotest 'a' 'b' 'a' 3
+
+# srcdn=desti
+dotest 'a' 'a' 'b' 4
+
+# all different
+dotest 'a' 'b' 'c' 5
+