Index: dam engine/trunk/src/Deltares.DamEngine.Calculators.Tests/DamPipingSellmeijer4ForcesTests.cs
===================================================================
diff -u -r511 -r515
--- dam engine/trunk/src/Deltares.DamEngine.Calculators.Tests/DamPipingSellmeijer4ForcesTests.cs	(.../DamPipingSellmeijer4ForcesTests.cs)	(revision 511)
+++ dam engine/trunk/src/Deltares.DamEngine.Calculators.Tests/DamPipingSellmeijer4ForcesTests.cs	(.../DamPipingSellmeijer4ForcesTests.cs)	(revision 515)
@@ -1,7 +1,11 @@
 using System.Collections.Generic;
+using System.Data;
 using Deltares.DamEngine.Calculators.KernelWrappers.Common;
 using Deltares.DamEngine.Calculators.KernelWrappers.DamPipingSellmeijer4Forces;
+using Deltares.DamEngine.Data.Design;
+using Deltares.DamEngine.Data.General;
 using Deltares.DamEngine.Data.General.Results;
+using Deltares.DamEngine.Data.Geotechnics;
 using Deltares.DamEngine.Data.Standard.Logging;
 using NUnit.Framework;
 
@@ -12,7 +16,7 @@
     {
 
         [Test]
-        public void TestCalculation()
+        public void TestFullCalculation()
         {
             // expected results are based on test in 'https://repos.deltares.nl/repos/dam/dam classic' revision 190
             // reducedFall = HRiver - HExit - (Rc * DTotal) = 1.0 - 0.0 - (0.3 * 2.0) = 0.4
@@ -48,5 +52,80 @@
             Assert.AreEqual(4.7596469835953883, result.PipingDesignResults.Sellmeijer4ForcesHcritical, diff);
         }
 
+        [Test]
+        public void TestValidate()
+        {
+            var kernelWrapper = new DamPipingSellmeijer4ForcesKernelWrapper();
+
+            // Validate without setting values. Expected error messages.
+            var damPipingInput = new DamPipingSellmeijer4ForcesInput();
+            List<LogMessage> messages;
+            kernelWrapper.Validate(damPipingInput, out messages);
+            Assert.IsTrue(messages.Count > 0);
+
+            // Validate the input when valid input is provided. Expected no messages.
+            damPipingInput = new DamPipingSellmeijer4ForcesInput
+            {
+                HRiver = 1.0,
+                HExit = 0.0,
+                Rc = 0.3,
+                DTotal = 2.0,
+                AquiferHeight = 8.0,
+                SeepageLength = 40.5,
+                D70 = 200.0,
+                WhitesConstant = 0.25,
+                BeddingAngle = 37.0,
+                WaterViscosity = 1.33E-06,
+                PermeabilityKx = 0.0001
+            };
+            messages.Clear();
+            kernelWrapper.Validate(damPipingInput, out messages);
+            Assert.AreEqual(0, messages.Count);
+        }
+
+        [Test]
+        public void TestPostProcess()
+        {
+            var kernelWrapper = new DamPipingSellmeijer4ForcesKernelWrapper();
+
+            DamPipingSellmeijer4ForcesOutput output = new DamPipingSellmeijer4ForcesOutput();
+            output.FoSp = 1.1;
+            output.Hc = 2.2;
+
+            DesignResult result;
+            kernelWrapper.PostProcess(output, out result);
+            Assert.AreEqual(output.FoSp, result.PipingDesignResults.Sellmeijer4ForcesFactor);
+            Assert.AreEqual(output.Hc, result.PipingDesignResults.Sellmeijer4ForcesHcritical);
+        }
+
+        [Test]
+        [ExpectedException(typeof(NoNullAllowedException), ExpectedMessage = "Geen invoer object gedefinieerd voor Sellmeijer 4 Krachten")]
+        [SetUICulture("nl-NL")]
+        public void TestLanguageNLThrowsExceptionWhenInputIsNull()
+        {
+            var kernelWrapper = new DamPipingSellmeijer4ForcesKernelWrapper();
+            List<LogMessage> messages;
+            kernelWrapper.Execute(null, out messages);
+        }
+
+        [Test]
+        [ExpectedException(typeof(NoNullAllowedException), ExpectedMessage = "No input object defined for Sellmeijer 4 Forces")]
+        [SetUICulture("en-US")]
+        public void TestLanguageENThrowsExceptionWhenInputIsNull()
+        {
+            var kernelWrapper = new DamPipingSellmeijer4ForcesKernelWrapper();
+            List<LogMessage> messages;
+            kernelWrapper.Execute(null, out messages);
+        }
+
+        [Test]
+        [ExpectedException(typeof(NoNullAllowedException), ExpectedMessage = "Geen uitvoer object gedefinieerd voor Sellmeijer 4 Krachten")]
+        [SetUICulture("nl-NL")]
+        public void TestThrowsExceptionWhenOutputIsNull()
+        {
+            var kernelWrapper = new DamPipingSellmeijer4ForcesKernelWrapper();
+            DesignResult result;
+            kernelWrapper.PostProcess(null, out result);
+        }
     }
 }