Index: Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContextTreeNodeInfoTest.cs
===================================================================
diff -u -r912149fd13ca6029a911390e4903091323f0563e -r67ac5dd8403d52b1dbd50c3d0a6eedb8925bc496
--- Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContextTreeNodeInfoTest.cs	(.../GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContextTreeNodeInfoTest.cs)	(revision 912149fd13ca6029a911390e4903091323f0563e)
+++ Ringtoets/GrassCoverErosionOutwards/test/Ringtoets.GrassCoverErosionOutwards.Plugin.Test/TreeNodeInfos/GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContextTreeNodeInfoTest.cs	(.../GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContextTreeNodeInfoTest.cs)	(revision 67ac5dd8403d52b1dbd50c3d0a6eedb8925bc496)
@@ -21,9 +21,16 @@
 
 using System.Drawing;
 using System.Linq;
+using Core.Common.Base;
 using Core.Common.Controls.TreeView;
+using Core.Common.Gui;
+using Core.Common.Gui.ContextMenu;
 using Core.Common.TestUtil;
 using NUnit.Framework;
+using Rhino.Mocks;
+using Ringtoets.Common.Data.AssessmentSection;
+using Ringtoets.Common.Data.Hydraulics;
+using Ringtoets.GrassCoverErosionOutwards.Data;
 using Ringtoets.GrassCoverErosionOutwards.Forms.PresentationObjects;
 using RingtoetsCommonFormsResources = Ringtoets.Common.Forms.Properties.Resources;
 
@@ -44,7 +51,7 @@
                 Assert.IsNotNull(info.Text);
                 Assert.IsNull(info.ForeColor);
                 Assert.IsNotNull(info.Image);
-                Assert.IsNull(info.ContextMenuStrip);
+                Assert.IsNotNull(info.ContextMenuStrip);
                 Assert.IsNull(info.EnsureVisibleOnCreate);
                 Assert.IsNull(info.ExpandOnCreate);
                 Assert.IsNull(info.ChildNodeObjects);
@@ -94,6 +101,48 @@
             }
         }
 
+        [Test]
+        public void ContextMenuStrip_Always_CallsContextMenuBuilderMethods()
+        {
+            // Setup
+            var mockRepository = new MockRepository();
+            var assessmentSection = mockRepository.StrictMock<IAssessmentSection>();
+            var menuBuilder = mockRepository.StrictMock<IContextMenuBuilder>();
+
+            using (mockRepository.Ordered())
+            {
+                menuBuilder.Expect(mb => mb.AddCollapseAllItem()).Return(menuBuilder);
+                menuBuilder.Expect(mb => mb.AddExpandAllItem()).Return(menuBuilder);
+                menuBuilder.Expect(mb => mb.Build()).Return(null);
+            }
+
+            var nodeData = new GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContext(new ObservableList<HydraulicBoundaryLocation>(),
+                                                                                                 new GrassCoverErosionOutwardsFailureMechanism(),
+                                                                                                 assessmentSection);
+
+            using (var treeViewControl = new TreeViewControl())
+            {
+                var gui = mockRepository.Stub<IGui>();
+                gui.Stub(g => g.ProjectOpened += null).IgnoreArguments();
+                gui.Stub(g => g.ProjectOpened -= null).IgnoreArguments();
+                gui.Stub(cmp => cmp.Get(nodeData, treeViewControl)).Return(menuBuilder);
+                mockRepository.ReplayAll();
+
+                using (var plugin = new GrassCoverErosionOutwardsPlugin())
+                {
+                    TreeNodeInfo info = GetInfo(plugin);
+
+                    plugin.Gui = gui;
+
+                    // Call
+                    info.ContextMenuStrip(nodeData, null, treeViewControl);
+                }
+            }
+
+            // Assert
+            mockRepository.VerifyAll();
+        }
+
         private static TreeNodeInfo GetInfo(GrassCoverErosionOutwardsPlugin plugin)
         {
             return plugin.GetTreeNodeInfos().First(tni => tni.TagType == typeof(GrassCoverErosionOutwardsDesignWaterLevelCalculationsGroupContext));