Index: Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.KernelWrapper.Test/Creators/AssessmentSectionAssemblyGroupCreatorTest.cs
===================================================================
diff -u -rc8c434869abbdce0dfb04de4434bda8b73bd9374 -r114bb02fabe1511c635dc2e3d38f1e992b2f8c5c
--- Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.KernelWrapper.Test/Creators/AssessmentSectionAssemblyGroupCreatorTest.cs	(.../AssessmentSectionAssemblyGroupCreatorTest.cs)	(revision c8c434869abbdce0dfb04de4434bda8b73bd9374)
+++ Riskeer/AssemblyTool/test/Riskeer.AssemblyTool.KernelWrapper.Test/Creators/AssessmentSectionAssemblyGroupCreatorTest.cs	(.../AssessmentSectionAssemblyGroupCreatorTest.cs)	(revision 114bb02fabe1511c635dc2e3d38f1e992b2f8c5c)
@@ -19,7 +19,10 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
+using System.Collections.Generic;
 using System.ComponentModel;
+using Assembly.Kernel.Model;
 using Assembly.Kernel.Model.Categories;
 using Core.Common.TestUtil;
 using NUnit.Framework;
@@ -33,6 +36,39 @@
     public class AssessmentSectionAssemblyGroupCreatorTest
     {
         [Test]
+        public void CreateAssessmentSectionAssemblyGroupBoundaries_AssessmentSectionCategoriesNull_ThrowsArgumentNullException()
+        {
+            // Call
+            void Call() => AssessmentSectionAssemblyGroupCreator.CreateAssessmentSectionAssemblyGroupBoundaries(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(Call);
+            Assert.AreEqual("assessmentSectionCategories", exception.ParamName);
+        }
+
+        [Test]
+        public void CreateAssessmentSectionAssemblyGroupBoundaries_WithValidAssessmentSectionCategories_ReturnsExpectedAssessmentSectionAssemblyGroups()
+        {
+            // Setup
+            var random = new Random(11);
+
+            var groups = new CategoriesList<AssessmentSectionCategory>(new[]
+            {
+                new AssessmentSectionCategory(random.NextEnumValue<EAssessmentGrade>(), new Probability(0), new Probability(0.25)),
+                new AssessmentSectionCategory(random.NextEnumValue<EAssessmentGrade>(), new Probability(0.25), new Probability(0.5)),
+                new AssessmentSectionCategory(random.NextEnumValue<EAssessmentGrade>(), new Probability(0.5), new Probability(0.75)),
+                new AssessmentSectionCategory(random.NextEnumValue<EAssessmentGrade>(), new Probability(0.75), new Probability(1))
+            });
+
+            // Call
+            IEnumerable<AssessmentSectionAssemblyGroupBoundaries> assemblyGroups =
+                AssessmentSectionAssemblyGroupCreator.CreateAssessmentSectionAssemblyGroupBoundaries(groups);
+
+            // Assert
+            AssessmentSectionAssemblyGroupAssert.AssertAssessmentSectionAssemblyGroups(groups, assemblyGroups);
+        }
+
+        [Test]
         public void CreateAssessmentSectionAssemblyGroup_WithInvalidAssessmentGrade_ThrowsInvalidEnumArgumentException()
         {
             // Call