PR feedback.

Author: codemzs

test/BaselineOutput/SingleDebug/Command/DataTypes-1-out.txt

@@ -0,0 +1 @@
+Wrote 5 rows across 9 columns in %Time%

test/BaselineOutput/SingleDebug/Command/DataTypes-2-out.txt

@@ -0,0 +1 @@
+Wrote 5 rows of length 9

test/BaselineOutput/SingleRelease/Command/DataTypes-1-out.txt

@@ -0,0 +1 @@
+Wrote 5 rows across 9 columns in %Time%

test/BaselineOutput/SingleRelease/Command/DataTypes-2-out.txt

@@ -0,0 +1 @@
+Wrote 5 rows of length 9

test/Microsoft.ML.TestFramework/TestCommandBase.cs

@@ -2034,8 +2034,13 @@ public void CommandTrainingBinaryFieldAwareFactorizationMachineWithValidationAnd
         public void DataTypes()
         {
             string idvPath = GetDataPath("datatypes.idv");
+            OutputPath intermediateData = CreateOutputPath("intermediateDatatypes.idv");
             OutputPath textOutputPath = CreateOutputPath("datatypes.txt");
             TestCore("savedata", idvPath, "loader=binary", "saver=text", textOutputPath.Arg("dout"));
+            _step++;
+            TestCore("savedata", idvPath, "loader=binary", "saver=binary", intermediateData.ArgOnly("dout"));
+            _step++;
+            TestCore("savedata", intermediateData.Path, "loader=binary", "saver=text", textOutputPath.Arg("dout"));
             Done();
         }
     }