Index: src/Deltares.DSoilModel.Data.Tests/SosSoilLayer1DTest.cs
===================================================================
diff -u -r296 -r299
--- src/Deltares.DSoilModel.Data.Tests/SosSoilLayer1DTest.cs	(.../SosSoilLayer1DTest.cs)	(revision 296)
+++ src/Deltares.DSoilModel.Data.Tests/SosSoilLayer1DTest.cs	(.../SosSoilLayer1DTest.cs)	(revision 299)
@@ -7,6 +7,7 @@
 using Deltares.Geotechnics;
 using Deltares.Geotechnics.IO;
 using Deltares.Standard.EventPublisher;
+using Deltares.Standard.Reflection;
 using Deltares.Standard.TestUtils;
 using KellermanSoftware.CompareNetObjects;
 using NUnit.Framework;
@@ -230,5 +231,66 @@
             Assert.AreEqual(0, result.Differences.Count, "SOSProfileLayer1D fails comparison: " + result.DifferencesString);
             Console.WriteLine("OK !");
         }
+
+        [Test]
+        public void CloneTest()
+        {
+            var sosLayer1D = new SosSoilLayer1D()
+            {
+                Name = "TestSos1",
+                TopLevel = 11,
+                MaximumTopLevel = 12,
+                MinimumTopLevel = 13,
+                RemarkTopLevel = "remark testSos1",
+                Soil = new Soil("TestSoil1", Color.Beige)
+            };
+
+            var sosLayer1DClone = sosLayer1D.Clone();
+
+            var comparer = new CompareLogic();
+            comparer.Config.ShowBreadcrumb = false;
+            comparer.Config.CompareStaticFields = false;
+            comparer.Config.CompareStaticProperties = false;
+            comparer.Config.AttributesToIgnore = new List<Type> { typeof(XmlIgnoreAttribute) };
+
+            // AS-IS: by some unclear reason these properties are set to NULL
+            comparer.Config.MembersToIgnore = new List<string> 
+            {
+                StaticReflection.GetMemberName<SosSoilLayer1D>(l => l.RemarkTopLevel),
+                StaticReflection.GetMemberName<SosSoilLayer1D>(l => l.MinimumTopLevel),
+                StaticReflection.GetMemberName<SosSoilLayer1D>(l => l.MaximumTopLevel)
+            };
+
+            var compareResult = comparer.Compare(sosLayer1D, sosLayer1DClone);
+            Assert.IsTrue(compareResult.AreEqual, compareResult.DifferencesString);
+        }
+
+        [Test]
+        public void AssignTest()
+        {
+            var sosLayer1 = new SosSoilLayer1D()
+            {
+                Name = "TestSos1",
+                TopLevel = 11,
+                MaximumTopLevel = 12,
+                MinimumTopLevel = 13,
+                RemarkTopLevel = "remark testSos1"
+            };
+
+            var sosLayer2 = new SosSoilLayer1D()
+            {
+                Name = "TestSos2",
+                TopLevel = 21,
+                MaximumTopLevel = 22,
+                MinimumTopLevel = 23,
+                RemarkTopLevel = "remark testSos2"
+            };
+
+            sosLayer2.Assign(sosLayer1);
+            // AS-IS: by some unclear and undocumented reason these properties should be NULL
+            Assert.IsNull(sosLayer2.RemarkTopLevel);
+            Assert.IsNull(sosLayer2.MinimumTopLevel);
+            Assert.IsNull(sosLayer2.MaximumTopLevel);
+        }
     }
 }
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