validate AutoFit 'Features' column must be of type R4 (dotnet#132)

Dmitry-A · Feb 14, 2019 · 1dc5ba2 · 1dc5ba2
1 parent 1ed4195
commit 1dc5ba2
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Showing 2 changed files with 19 additions and 1 deletion.
diff --git a/src/Microsoft.ML.Auto/Utils/UserInputValidationUtil.cs b/src/Microsoft.ML.Auto/Utils/UserInputValidationUtil.cs
@@ -7,6 +7,7 @@
 using System.IO;
 using System.Linq;
 using Microsoft.Data.DataView;
+using Microsoft.ML.Data;
 
 namespace Microsoft.ML.Auto
 {
@@ -45,6 +46,11 @@ private static void ValidateTrainData(IDataView trainData)
             {
                 throw new ArgumentNullException(nameof(trainData), "Training data cannot be null");
             }
+
+            if (trainData.Schema.GetColumnOrNull(DefaultColumnNames.Features)?.Type.GetItemType() != NumberType.R4)
+            {
+                throw new ArgumentException($"{DefaultColumnNames.Features} column must be of data type Single", nameof(trainData));
+            }
         }
 
         private static void ValidateLabel(IDataView trainData, string label)
@@ -174,4 +180,4 @@ private static string FindFirstDuplicate(IEnumerable<string> values)
             return groups.FirstOrDefault(g => g.Count() > 1)?.Key;
         }
     }
-}
+}
diff --git a/src/Test/UserInputValidationTests.cs b/src/Test/UserInputValidationTests.cs
@@ -197,5 +197,17 @@ public void ValidateInferColsPath()
         {
             UserInputValidationUtil.ValidateInferColumnsArgs(DatasetUtil.DownloadUciAdultDataset());
         }
+
+        [TestMethod]
+        [ExpectedException(typeof(ArgumentException))]
+        public void ValidateFeaturesColInvalidType()
+        {
+            var schemaBuilder = new SchemaBuilder();
+            schemaBuilder.AddColumn(DefaultColumnNames.Features, NumberType.R8);
+            schemaBuilder.AddColumn(DefaultColumnNames.Label, NumberType.R4);
+            var schema = schemaBuilder.GetSchema();
+            var dataView = new EmptyDataView(new MLContext(), schema);
+            UserInputValidationUtil.ValidateAutoFitArgs(dataView, DefaultColumnNames.Label, null, null, null);
+        }
     }
 }