Index: src/Deltares.DSoilModel.Forms.Tests/SosSoilLayer1DControlTests.cs
===================================================================
diff -u -r376 -r377
--- src/Deltares.DSoilModel.Forms.Tests/SosSoilLayer1DControlTests.cs	(.../SosSoilLayer1DControlTests.cs)	(revision 376)
+++ src/Deltares.DSoilModel.Forms.Tests/SosSoilLayer1DControlTests.cs	(.../SosSoilLayer1DControlTests.cs)	(revision 377)
@@ -14,6 +14,14 @@
             return new SosSoilLayer1DControl();
         }
 
+        /// <summary>
+        /// Class to mock complex property with very specific logic, so it becomes much more testable.
+        /// </summary>
+        private class MockedSosSoilLayer1D : SosSoilLayer1D
+        {
+            public override double BottomLevel { get; set; }
+        }
+
         [Test]
         public void ControlBindingsTest()
         {
@@ -22,7 +30,7 @@
             var soil2 = new Soil("TestSoil2", Color.Red);
             p.Soils.Add(soil2);
             p.Soils.Add(soil1);
-            var layer = new SosSoilLayer1D
+            var layer = new MockedSosSoilLayer1D
             {
                 TopLevel = 9.9,
 //                BottomLevel = 1.1,
@@ -42,7 +50,7 @@
             TestLabelControlVisibleValue(PropertyControl, "TopLabel", true, "Bovenkant [m NAP]");
             TestSpinEditVisibleEnabledValue(PropertyControl, "TopEdit", true, true, layer, l => l.TopLevel, 9.1);
             TestLabelControlVisibleValue(PropertyControl, "BottomLabel", true, "Onderkant [m NAP]");
-//            TestSpinEditVisibleEnabledValue(PropertyControl, "BottomEdit", true, true, layer, l => l.BottomLevel, 2.2); // TODO: crazy property
+            TestSpinEditVisibleEnabledValue(PropertyControl, "BottomEdit", true, true, layer, l => l.BottomLevel, 2.2);
             TestLabelControlVisibleValue(PropertyControl, "HeightLabel", true, "Hoogte [m]");
             TestSpinEditVisibleEnabledValue(PropertyControl, "HeightEdit", true, false, layer, l => l.Height); // only getter
             TestLabelControlVisibleValue(PropertyControl, "MaxDepthTopLevelLabel", true, "Maximale waarde bovenkant [m]");