Added Unit test for nccl send recv (#506)

Added Send Receive test that tests through all pairs

test/common/PrepDataFuncs.cpp

@@ -23,7 +23,8 @@ namespace RcclUnitTesting
     case ncclCollGather:        return DefaultPrepData_Gather(collArgs, false);
     case ncclCollScatter:       return DefaultPrepData_Scatter(collArgs);
     case ncclCollAllToAll:      return DefaultPrepData_AllToAll(collArgs);
-      //case ncclCollSendRecv:      return DefaultPrepData_SendRecv(collArgs);
+    case ncclCollSend:          return DefaultPrepData_Send(collArgs);
+    case ncclCollRecv:          return DefaultPrepData_Recv(collArgs);
     default:
       ERROR("Unknown func type %d\n", collArgs.funcType);
       return TEST_FAIL;
@@ -339,4 +340,21 @@ namespace RcclUnitTesting
     }
     return TEST_SUCCESS;
   }
+
+  ErrCode DefaultPrepData_Send(CollectiveArgs &collArgs)
+  {
+    CHECK_CALL(CheckAllocation(collArgs));
+    return collArgs.inputGpu.FillPattern(collArgs.dataType,
+                                               collArgs.numInputElements,
+                                               collArgs.globalRank, true);
+  }
+
+  ErrCode DefaultPrepData_Recv(CollectiveArgs &collArgs)
+  {
+    CHECK_CALL(CheckAllocation(collArgs));
+    return collArgs.expected.FillPattern(collArgs.dataType,
+                                         collArgs.numOutputElements,
+                                         collArgs.root,
+                                         false);
+  }
 }