Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil.Test/ClosingStructurePermutationHelperTest.cs
===================================================================
diff -u
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil.Test/ClosingStructurePermutationHelperTest.cs	(revision 0)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil.Test/ClosingStructurePermutationHelperTest.cs	(revision 36d31be7cd357f771712dce5d134e0aba478042a)
@@ -0,0 +1,117 @@
+// Copyright (C) Stichting Deltares 2017. All rights reserved.
+//
+// This file is part of Ringtoets.
+//
+// Ringtoets is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using System.Collections.Generic;
+using System.Linq;
+using NUnit.Framework;
+
+namespace Ringtoets.ClosingStructures.Data.TestUtil.Test
+{
+    [TestFixture]
+    public class ClosingStructurePermutationHelperTest
+    {
+        [Test]
+        public void DifferentClosingStructureWithSameId_ReturnsExpectedTestCaseData()
+        {
+            // Setup
+            var referenceStructure = new TestClosingStructure();
+            var differentStructures = new List<ClosingStructure>();
+
+            // Call
+            List<TestCaseData> testCaseDatas = ClosingStructurePermutationHelper.DifferentClosingStructuresWithSameId("A", "B").ToList();
+
+            // Assert
+            Assert.AreEqual(16, testCaseDatas.Count);
+            IEnumerable<string> testNames = testCaseDatas
+                .Select(tcd => tcd.TestName)
+                .ToList();
+            Assert.AreEqual(16, testNames.Distinct().Count());
+            Assert.IsTrue(testNames.All(tn => tn.StartsWith("A_")));
+            Assert.IsTrue(testNames.All(tn => tn.EndsWith("_B")));
+            IEnumerable<ClosingStructure> structures = testCaseDatas
+                .Select(tcd => tcd.Arguments[0])
+                .OfType<ClosingStructure>()
+                .ToList();
+            Assert.AreEqual(16, structures.Count());
+            Assert.IsTrue(structures.All(s => s.Id == structures.First().Id));
+            differentStructures.Add(structures.Single(s => !s.Name.Equals(referenceStructure.Name)));
+            differentStructures.Add(structures.Single(s => !s.Location.Equals(referenceStructure.Location)));
+            differentStructures.Add(structures.Single(s => !s.AreaFlowApertures.Equals(referenceStructure.AreaFlowApertures)));
+            differentStructures.Add(structures.Single(s => !s.CriticalOvertoppingDischarge.Equals(referenceStructure.CriticalOvertoppingDischarge)));
+            differentStructures.Add(structures.Single(s => !s.FlowWidthAtBottomProtection.Equals(referenceStructure.FlowWidthAtBottomProtection)));
+            differentStructures.Add(structures.Single(s => !s.InsideWaterLevel.Equals(referenceStructure.InsideWaterLevel)));
+            differentStructures.Add(structures.Single(s => !s.LevelCrestStructureNotClosing.Equals(referenceStructure.LevelCrestStructureNotClosing)));
+            differentStructures.Add(structures.Single(s => !s.StorageStructureArea.Equals(referenceStructure.StorageStructureArea)));
+            differentStructures.Add(structures.Single(s => !s.ThresholdHeightOpenWeir.Equals(referenceStructure.ThresholdHeightOpenWeir)));
+            differentStructures.Add(structures.Single(s => !s.WidthFlowApertures.Equals(referenceStructure.WidthFlowApertures)));
+            differentStructures.Add(structures.Single(s => !s.FailureProbabilityReparation.Equals(referenceStructure.FailureProbabilityReparation)));
+            differentStructures.Add(structures.Single(s => !s.FailureProbabilityOpenStructure.Equals(referenceStructure.FailureProbabilityOpenStructure)));
+            differentStructures.Add(structures.Single(s => !s.IdenticalApertures.Equals(referenceStructure.IdenticalApertures)));
+            differentStructures.Add(structures.Single(s => !s.InflowModelType.Equals(referenceStructure.InflowModelType)));
+            differentStructures.Add(structures.Single(s => !s.ProbabilityOrFrequencyOpenStructureBeforeFlooding.Equals(referenceStructure.ProbabilityOrFrequencyOpenStructureBeforeFlooding)));
+            differentStructures.Add(structures.Single(s => !s.StructureNormalOrientation.Equals(referenceStructure.StructureNormalOrientation)));
+            Assert.AreEqual(16, differentStructures.Distinct().Count());
+        }
+
+        [Test]
+        public void DifferentClosingStructuresWithSameIdNameAndLocation_ReturnsExpectedTestCaseData()
+        {
+            // Setup
+            var referenceStructure = new TestClosingStructure();
+            var differentStructures = new List<ClosingStructure>();
+
+            // Call
+            List<TestCaseData> testCaseDatas = ClosingStructurePermutationHelper.DifferentClosingStructuresWithSameIdNameAndLocation("C", "D").ToList();
+
+            // Assert
+            Assert.AreEqual(14, testCaseDatas.Count);
+            IEnumerable<string> testNames = testCaseDatas
+                .Select(tcd => tcd.TestName)
+                .ToList();
+            Assert.AreEqual(14, testNames.Distinct().Count());
+            Assert.IsTrue(testNames.All(tn => tn.StartsWith("C_")));
+            Assert.IsTrue(testNames.All(tn => tn.EndsWith("_D")));
+            IEnumerable<ClosingStructure> structures = testCaseDatas
+                .Select(tcd => tcd.Arguments[0])
+                .OfType<ClosingStructure>()
+                .ToList();
+            Assert.AreEqual(14, structures.Count());
+            Assert.IsTrue(structures.All(s => s.Id == referenceStructure.Id));
+            Assert.IsTrue(structures.All(s => s.Name == referenceStructure.Name));
+            Assert.IsTrue(structures.All(s => s.Location.Equals(referenceStructure.Location)));
+            differentStructures.Add(structures.Single(s => !s.AreaFlowApertures.Equals(referenceStructure.AreaFlowApertures)));
+            differentStructures.Add(structures.Single(s => !s.CriticalOvertoppingDischarge.Equals(referenceStructure.CriticalOvertoppingDischarge)));
+            differentStructures.Add(structures.Single(s => !s.FlowWidthAtBottomProtection.Equals(referenceStructure.FlowWidthAtBottomProtection)));
+            differentStructures.Add(structures.Single(s => !s.InsideWaterLevel.Equals(referenceStructure.InsideWaterLevel)));
+            differentStructures.Add(structures.Single(s => !s.LevelCrestStructureNotClosing.Equals(referenceStructure.LevelCrestStructureNotClosing)));
+            differentStructures.Add(structures.Single(s => !s.StorageStructureArea.Equals(referenceStructure.StorageStructureArea)));
+            differentStructures.Add(structures.Single(s => !s.ThresholdHeightOpenWeir.Equals(referenceStructure.ThresholdHeightOpenWeir)));
+            differentStructures.Add(structures.Single(s => !s.WidthFlowApertures.Equals(referenceStructure.WidthFlowApertures)));
+            differentStructures.Add(structures.Single(s => !s.FailureProbabilityReparation.Equals(referenceStructure.FailureProbabilityReparation)));
+            differentStructures.Add(structures.Single(s => !s.FailureProbabilityOpenStructure.Equals(referenceStructure.FailureProbabilityOpenStructure)));
+            differentStructures.Add(structures.Single(s => !s.IdenticalApertures.Equals(referenceStructure.IdenticalApertures)));
+            differentStructures.Add(structures.Single(s => !s.InflowModelType.Equals(referenceStructure.InflowModelType)));
+            differentStructures.Add(structures.Single(s => !s.ProbabilityOrFrequencyOpenStructureBeforeFlooding.Equals(referenceStructure.ProbabilityOrFrequencyOpenStructureBeforeFlooding)));
+            differentStructures.Add(structures.Single(s => !s.StructureNormalOrientation.Equals(referenceStructure.StructureNormalOrientation)));
+            Assert.AreEqual(14, differentStructures.Distinct().Count());
+        }
+    }
+}
\ No newline at end of file
Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil.Test/Ringtoets.ClosingStructures.Data.TestUtil.Test.csproj
===================================================================
diff -u -r37453954b2d36699ea16375cdfbf89785a094ab9 -r36d31be7cd357f771712dce5d134e0aba478042a
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil.Test/Ringtoets.ClosingStructures.Data.TestUtil.Test.csproj	(.../Ringtoets.ClosingStructures.Data.TestUtil.Test.csproj)	(revision 37453954b2d36699ea16375cdfbf89785a094ab9)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil.Test/Ringtoets.ClosingStructures.Data.TestUtil.Test.csproj	(.../Ringtoets.ClosingStructures.Data.TestUtil.Test.csproj)	(revision 36d31be7cd357f771712dce5d134e0aba478042a)
@@ -49,6 +49,7 @@
     <Compile Include="..\..\..\..\Core\Common\src\Core.Common.Version\GlobalAssembly.cs">
       <Link>Properties\GlobalAssembly.cs</Link>
     </Compile>
+    <Compile Include="ClosingStructurePermutationHelperTest.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="TestClosingStructureCalculationTest.cs" />
     <Compile Include="TestClosingStructuresFailureMechanismTest.cs" />
Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil/ClosingStructurePermutationHelper.cs
===================================================================
diff -u -rc5390b303f47e65a1a8e0ba271017c77dae24bbc -r36d31be7cd357f771712dce5d134e0aba478042a
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil/ClosingStructurePermutationHelper.cs	(.../ClosingStructurePermutationHelper.cs)	(revision c5390b303f47e65a1a8e0ba271017c77dae24bbc)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Data.TestUtil/ClosingStructurePermutationHelper.cs	(.../ClosingStructurePermutationHelper.cs)	(revision 36d31be7cd357f771712dce5d134e0aba478042a)
@@ -170,31 +170,31 @@
             ClosingStructure.ConstructionProperties differentFailureProbabilityOpenStructureConstructionProperties =
                 CreateTestClosingStructureConstructionProperties();
             differentFailureProbabilityOpenStructureConstructionProperties.FailureProbabilityOpenStructure = random.NextDouble();
-            yield return new TestCaseData(new ClosingStructure(CreateTestClosingStructureConstructionProperties()))
+            yield return new TestCaseData(new ClosingStructure(differentFailureProbabilityOpenStructureConstructionProperties))
                 .SetName($"{targetName}_DifferentFailureProbabilityOpenStructure_{testResultDescription}");
 
             ClosingStructure.ConstructionProperties differentIdenticalAperturesProperties =
                 CreateTestClosingStructureConstructionProperties();
             differentIdenticalAperturesProperties.IdenticalApertures = random.Next();
-            yield return new TestCaseData(new ClosingStructure(CreateTestClosingStructureConstructionProperties()))
+            yield return new TestCaseData(new ClosingStructure(differentIdenticalAperturesProperties))
                 .SetName($"{targetName}_DifferentIdenticalApertures_{testResultDescription}");
 
             ClosingStructure.ConstructionProperties differentInflowModelTypeConstructionProperties =
                 CreateTestClosingStructureConstructionProperties();
             differentInflowModelTypeConstructionProperties.InflowModelType = random.NextEnumValue<ClosingStructureInflowModelType>();
-            yield return new TestCaseData(new ClosingStructure(CreateTestClosingStructureConstructionProperties()))
+            yield return new TestCaseData(new ClosingStructure(differentInflowModelTypeConstructionProperties))
                 .SetName($"{targetName}_DifferentInflowModelType_{testResultDescription}");
 
             ClosingStructure.ConstructionProperties differentProbabilityOrFrequencyOpenStructureBeforeFloodingConstructionProperties =
                 CreateTestClosingStructureConstructionProperties();
             differentProbabilityOrFrequencyOpenStructureBeforeFloodingConstructionProperties.ProbabilityOrFrequencyOpenStructureBeforeFlooding = random.NextDouble();
-            yield return new TestCaseData(new ClosingStructure(CreateTestClosingStructureConstructionProperties()))
+            yield return new TestCaseData(new ClosingStructure(differentProbabilityOrFrequencyOpenStructureBeforeFloodingConstructionProperties))
                 .SetName($"{targetName}_DifferentProbabilityOrFrequencyOpenStructureBeforeFlooding_{testResultDescription}");
 
             ClosingStructure.ConstructionProperties differentStructureNormalOrientationConstructionProperties =
                 CreateTestClosingStructureConstructionProperties();
             differentStructureNormalOrientationConstructionProperties.StructureNormalOrientation = random.NextRoundedDouble();
-            yield return new TestCaseData(new ClosingStructure(CreateTestClosingStructureConstructionProperties()))
+            yield return new TestCaseData(new ClosingStructure(differentStructureNormalOrientationConstructionProperties))
                 .SetName($"{targetName}_DifferentStructureNormalOrientation_{testResultDescription}");
         }