It is possible with quite some effort – depending on your environment.
check the forum in the VNX and Celerra areas – this topic has been discussed a number of times over the last years
Usually it requires setting up new test VDMs or using writeable checkpoints
For a true DR test you would need to be able to split off the DR site so that you can use the same IP and CIFS server names twice – but that require also splitting off Active Directory, DNS, …
So most customers settle for testing DR access – making the replicated data available under different server names and IP’s
If all you want to do is to see (readonly) if the data is all there and intact the simplest way is to create a DM global CIFS server on the dst VNX and access via C$ share