/*D
   MPI_Test - Test for the completion of a request

Synopsis:
.vb
int MPI_Test(MPI_Request *request, int *flag, MPI_Status *status)
.ve

Input/Output Parameters:
. request - communication request (handle)

Output Parameters:
+ flag - true if operation completed (logical)
- status - status object (Status)

.N waitstatus

.N ThreadSafe

.N Fortran

.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_REQUEST
.N MPI_ERR_OTHER

D*/

