Revert "file add and delete test"

This reverts commit 4d67f39f86c93956f8aa395fff0e347f61202b06.
Revert "Revert "file add and delete test""

This reverts commit 4eb819f1ffc4f1885c97c669dff1584e969ee394.
Revert "Revert "Revert "file add and delete test"""

This reverts commit 21112058d20b64f587201d8741ee4c242c63bbbd.