Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityTest.cs
===================================================================
diff -u -r0a51f20ac93373a43f79bb4c6327bce1d46545c6 -rf109332b5185b4445e2f1b9386dc1fe4063ff20f
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityTest.cs	(.../HeightStructuresCalculationActivityTest.cs)	(revision 0a51f20ac93373a43f79bb4c6327bce1d46545c6)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Service.Test/HeightStructuresCalculationActivityTest.cs	(.../HeightStructuresCalculationActivityTest.cs)	(revision f109332b5185b4445e2f1b9386dc1fe4063ff20f)
@@ -19,6 +19,7 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using Core.Common.Base.Service;
 using NUnit.Framework;
 using Rhino.Mocks;
@@ -52,5 +53,78 @@
 
             mocks.VerifyAll();
         }
+
+        [Test]
+        public void ParameteredConstructor_CalculationNull_ThrowsArgumentNullException()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            mocks.ReplayAll();
+
+            var failureMechanism = new HeightStructuresFailureMechanism();
+
+            // Call
+            TestDelegate call = () => new HeightStructuresCalculationActivity(null, "", failureMechanism, assessmentSectionMock);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("calculation", exception.ParamName);
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void ParameteredConstructor_HlcdDirectoryNull_ThrowsArgumentNullException()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            mocks.ReplayAll();
+
+            var failureMechanism = new HeightStructuresFailureMechanism();
+            var calculation = new HeightStructuresCalculation();
+
+            // Call
+            TestDelegate call = () => new HeightStructuresCalculationActivity(calculation, null, failureMechanism, assessmentSectionMock);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("hlcdDirectory", exception.ParamName);
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void ParameteredConstructor_FailureMechanismNull_ThrowsArgumentNullException()
+        {
+            // Setup
+            var mocks = new MockRepository();
+            var assessmentSectionMock = mocks.StrictMock<IAssessmentSection>();
+            mocks.ReplayAll();
+
+            var calculation = new HeightStructuresCalculation();
+
+            // Call
+            TestDelegate call = () => new HeightStructuresCalculationActivity(calculation, "", null, assessmentSectionMock);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("failureMechanism", exception.ParamName);
+            mocks.VerifyAll();
+        }
+
+        [Test]
+        public void ParameteredConstructor_AssessmentSectionNull_ThrowsArgumentNullException()
+        {
+            // Setup
+            var failureMechanism = new HeightStructuresFailureMechanism();
+            var calculation = new HeightStructuresCalculation();
+
+            // Call
+            TestDelegate call = () => new HeightStructuresCalculationActivity(calculation, "", failureMechanism, null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("assessmentSection", exception.ParamName);
+        }
     }
 }
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