rmdir d1 - should fail with ENOTEMPTY
  error: Non-empty directory
rmdir d1/d2 - should succeed
  success
rmdir d1 - should fail with ENOTEMPTY
  error: Non-empty directory
rmdir d1 - should succeed
  success
rmdir d1 - should fail with ENOENT
  error: *
removedirs d2 (and d1) - should succeed
  success
removedirs d1 - should fail with ENOENT
  error: *