message: write three different files for Sync, Deferred and Deferred+PerformPuts writes
diff: @@ -81,6 +81,7 @@ TEST_F(BPBufferSizeTest, SyncDeferredIdenticalUsage)
  {
  std::string fnameSync = "ADIOS2BPBufferSizeSync.bp";
  std::string fnameDeferred = "ADIOS2BPBufferSizeDeferred.bp";
  + std::string fnameDeferredPP = "ADIOS2BPBufferSizeDeferredPP.bp";
  int mpiRank = 0, mpiSize = 1;
  // Number of rows
  const std::size_t Nx = 10485760; // 10M elements, 80MB variable
  @@ -196,7 +197,8 @@ TEST_F(BPBufferSizeTest, SyncDeferredIdenticalUsage)
  size_t bufsize_deferred_pp_v3[NSteps];
  size_t bufsize_deferred_pp_endstep[NSteps];
  {
  - adios2::Engine engine = io.Open(fnameDeferred, adios2::Mode::Write);
  + adios2::Engine engine =
  + io.Open(fnameDeferredPP, adios2::Mode::Write);
  bufsize_deferred_pp_init =
  GetAndPrintBufferSize(engine, "After Open():");
  