Index: DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs
===================================================================
diff -u -r1117 -r1156
--- DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs	(.../ConversionHelperTests.cs)	(revision 1117)
+++ DamEngine/trunk/src/Deltares.DamEngine.Interface.Tests/ConversionHelperTests.cs	(.../ConversionHelperTests.cs)	(revision 1156)
@@ -554,5 +554,27 @@
         {
             Assert.AreEqual(regionalResultType, ConversionHelper.ConvertToRegionalResultType(outputRegionalResultType));
         }
+
+        [Test]
+        [TestCase(SoilType.Clay, LocationAssesmentRegionalOptionsDikeMaterialType.Clay)]
+        [TestCase(SoilType.Gravel, LocationAssesmentRegionalOptionsDikeMaterialType.Gravel)]
+        [TestCase(SoilType.Loam, LocationAssesmentRegionalOptionsDikeMaterialType.Loam)]
+        [TestCase(SoilType.Peat, LocationAssesmentRegionalOptionsDikeMaterialType.Peat)]
+        [TestCase(SoilType.Sand, LocationAssesmentRegionalOptionsDikeMaterialType.Sand)]
+        public void CanConvertToSoilType(LocationAssesmentRegionalOptionsDikeMaterialType dikeMaterialType, SoilType soilType)
+        {
+            Assert.AreEqual(soilType, ConversionHelper.ConvertToSoilType(dikeMaterialType));
+        }
+
+        [Test]
+        [TestCase(LocationAssesmentRegionalOptionsDikeMaterialType.Clay, SoilType.Clay)]
+        [TestCase(LocationAssesmentRegionalOptionsDikeMaterialType.Gravel, SoilType.Gravel)]
+        [TestCase(LocationAssesmentRegionalOptionsDikeMaterialType.Loam, SoilType.Loam)]
+        [TestCase(LocationAssesmentRegionalOptionsDikeMaterialType.Peat, SoilType.Peat)]
+        [TestCase(LocationAssesmentRegionalOptionsDikeMaterialType.Sand, SoilType.Sand)]
+        public void CanConvertToDikeMaterialType(SoilType soilType, LocationAssesmentRegionalOptionsDikeMaterialType dikeMaterialType)
+        {
+            Assert.AreEqual(dikeMaterialType, ConversionHelper.ConvertToInputSoilType(soilType));
+        }
     }
 }