Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Forms.Test/Views/MacroStabilityInwardsInputViewTest.cs
===================================================================
diff -u -r9e2f9f7fe2d7daf45c943fc446cd9edc4298290d -ree422c0282fbaf9bb64b1661f72910964a8a0737
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Forms.Test/Views/MacroStabilityInwardsInputViewTest.cs	(.../MacroStabilityInwardsInputViewTest.cs)	(revision 9e2f9f7fe2d7daf45c943fc446cd9edc4298290d)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.Forms.Test/Views/MacroStabilityInwardsInputViewTest.cs	(.../MacroStabilityInwardsInputViewTest.cs)	(revision ee422c0282fbaf9bb64b1661f72910964a8a0737)
@@ -32,7 +32,6 @@
 using Ringtoets.Common.Forms.TestUtil;
 using Ringtoets.MacroStabilityInwards.Data;
 using Ringtoets.MacroStabilityInwards.Data.SoilProfile;
-using Ringtoets.MacroStabilityInwards.Data.TestUtil;
 using Ringtoets.MacroStabilityInwards.Data.TestUtil.SoilProfile;
 using Ringtoets.MacroStabilityInwards.Forms.TestUtil;
 using Ringtoets.MacroStabilityInwards.Forms.Views;
@@ -325,13 +324,7 @@
                 view.Data = calculation;
 
                 // Assert
-                ChartData[] chartDataArray = view.Chart.Data.Collection.ToArray();
-
-                var waternetZonesExtremeData = (ChartDataCollection) chartDataArray[waternetZonesExtremeIndex];
-                var waternetZonesDailyData = (ChartDataCollection) chartDataArray[waternetZonesDailyIndex];
-
-                CollectionAssert.IsEmpty(waternetZonesExtremeData.Collection);
-                CollectionAssert.IsEmpty(waternetZonesDailyData.Collection);
+                MacroStabilityInwardsInputViewChartDataAssert.AssertEmptyWaternetChartData(view.Chart.Data);
             }
         }
 
@@ -886,13 +879,7 @@
                 calculation.InputParameters.NotifyObservers();
 
                 // Assert
-                ChartData[] chartDataArray = view.Chart.Data.Collection.ToArray();
-
-                var waternetZonesExtremeData = (ChartDataCollection) chartDataArray[waternetZonesExtremeIndex];
-                var waternetZonesDailyData = (ChartDataCollection) chartDataArray[waternetZonesDailyIndex];
-
-                CollectionAssert.IsEmpty(waternetZonesExtremeData.Collection);
-                CollectionAssert.IsEmpty(waternetZonesDailyData.Collection);
+                MacroStabilityInwardsInputViewChartDataAssert.AssertEmptyWaternetChartData(view.Chart.Data);
             }
         }
 
@@ -916,14 +903,8 @@
                 view.Data = calculation;
 
                 // Precondition
-                ChartData[] chartDataArray = view.Chart.Data.Collection.ToArray();
+                MacroStabilityInwardsInputViewChartDataAssert.AssertEmptyWaternetChartData(view.Chart.Data);
 
-                var waternetZonesExtremeData = (ChartDataCollection) chartDataArray[waternetZonesExtremeIndex];
-                var waternetZonesDailyData = (ChartDataCollection) chartDataArray[waternetZonesDailyIndex];
-
-                CollectionAssert.IsEmpty(waternetZonesExtremeData.Collection);
-                CollectionAssert.IsEmpty(waternetZonesDailyData.Collection);
-
                 using (new MacroStabilityInwardsCalculatorFactoryConfig())
                 {
                     // Call