Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/TreeNodeInfos/GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -r92572f54bf61141e88d3557b42f686c87b616d9e -ree395d64328db8f999b871e80491399a0a65e844
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/TreeNodeInfos/GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision 92572f54bf61141e88d3557b42f686c87b616d9e)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Forms.Test/TreeNodeInfos/GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs	(.../GrassCoverErosionOutwardsWaveConditionsCalculationGroupContextTreeNodeInfoTest.cs)	(revision ee395d64328db8f999b871e80491399a0a65e844)
@@ -93,7 +93,7 @@
         }
 
         [TearDown]
-        public void TearDown()
+        public override void TearDown()
         {
             plugin.Dispose();
             mocks.VerifyAll();
@@ -153,6 +153,55 @@
         }
 
         [Test]
+        public void ChildNodeObjects_EmptyGroup_ReturnEmpty()
+        {
+            // Setup
+            var assessmentSection = mocks.Stub<IAssessmentSection>();
+            mocks.ReplayAll();
+
+            var failureMechanism = new GrassCoverErosionOutwardsFailureMechanism();
+
+            var groupContext = new GrassCoverErosionOutwardsWaveConditionsCalculationGroupContext(failureMechanism.WaveConditionsCalculationGroup,
+                                                                                            failureMechanism,
+                                                                                            assessmentSection);
+
+            // Call
+            var children = info.ChildNodeObjects(groupContext);
+
+            // Assert
+            CollectionAssert.IsEmpty(children);
+        }
+
+        [Test]
+        public void ChildNodeObjects_GroupWithChildren_ReturnChildren()
+        {
+            // Setup
+            var assessmentSection = mocks.Stub<IAssessmentSection>();
+            var calculationItem = mocks.StrictMock<ICalculationBase>();
+            mocks.ReplayAll();
+
+            var childGroup = new CalculationGroup();
+
+            var failureMechanism = new GrassCoverErosionOutwardsFailureMechanism();
+            failureMechanism.WaveConditionsCalculationGroup.Children.Add(calculationItem);
+            failureMechanism.WaveConditionsCalculationGroup.Children.Add(childGroup);
+
+            var nodeData = new GrassCoverErosionOutwardsWaveConditionsCalculationGroupContext(failureMechanism.WaveConditionsCalculationGroup,
+                                                                                        failureMechanism,
+                                                                                        assessmentSection);
+
+            // Call
+            var children = info.ChildNodeObjects(nodeData).ToArray();
+
+            // Assert
+            Assert.AreEqual(failureMechanism.WaveConditionsCalculationGroup.Children.Count, children.Length);
+            Assert.AreSame(calculationItem, children[0]);
+            var returnedCalculationGroupContext = (GrassCoverErosionOutwardsWaveConditionsCalculationGroupContext)children[1];
+            Assert.AreSame(childGroup, returnedCalculationGroupContext.WrappedData);
+            Assert.AreSame(failureMechanism, returnedCalculationGroupContext.FailureMechanism);
+        }
+
+        [Test]
         public void ContextMenuStrip_NestedCalculationGroup_ReturnContextMenuWithItems()
         {
             // Setup