Index: Core/Gui/test/Core.Gui.Test/Helpers/MapDataContextHelperTest.cs
===================================================================
diff -u
--- Core/Gui/test/Core.Gui.Test/Helpers/MapDataContextHelperTest.cs	(revision 0)
+++ Core/Gui/test/Core.Gui.Test/Helpers/MapDataContextHelperTest.cs	(revision aa5a80812ce9c3eef49a21c0d970e8cc854c1a13)
@@ -0,0 +1,77 @@
+// Copyright (C) Stichting Deltares 2021. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser 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;
+using System.Collections.Generic;
+using Core.Components.Gis.Data;
+using Core.Gui.Helpers;
+using Core.Gui.PresentationObjects.Map;
+using NUnit.Framework;
+
+namespace Core.Gui.Test.Helpers
+{
+    [TestFixture]
+    public class MapDataContextHelperTest
+    {
+        [Test]
+        public void GetParentsFromContext_ContextNull_ThrowsArgumentNullException()
+        {
+            // Call
+            TestDelegate call = () => MapDataContextHelper.GetParentsFromContext(null);
+
+            // Assert
+            var exception = Assert.Throws<ArgumentNullException>(call);
+            Assert.AreEqual("context", exception.ParamName);
+        }
+
+        [Test]
+        public void GetParentsFromContext_ContextParentMapDataNull_ReturnsEmptyCollection()
+        {
+            // Setup
+            var context = new MapDataCollectionContext(new MapDataCollection("test"), null);
+
+            // Call
+            IEnumerable<MapDataCollection> parents = MapDataContextHelper.GetParentsFromContext(context);
+
+            // Assert
+            CollectionAssert.IsEmpty(parents);
+        }
+
+        [Test]
+        public void GetParentsFromContext_ContextWithParents_ReturnsCollectionWithAllParents()
+        {
+            // Setup
+            var rootContext = new MapDataCollectionContext(new MapDataCollection("root"), null);
+            var nestedContext1 = new MapDataCollectionContext(new MapDataCollection("nested1"), rootContext);
+            var nestedContext2 = new MapDataCollectionContext(new MapDataCollection("test"), nestedContext1);
+
+            // Call
+            IEnumerable<MapDataCollection> parents = MapDataContextHelper.GetParentsFromContext(nestedContext2);
+
+            // Assert
+            CollectionAssert.AreEqual(new[]
+            {
+                nestedContext1.WrappedData,
+                rootContext.WrappedData
+            }, parents);
+        }
+    }
+}
\ No newline at end of file
Fisheye: Tag aa5a80812ce9c3eef49a21c0d970e8cc854c1a13 refers to a dead (removed) revision in file `Core/Plugins/test/Core.Plugins.Map.Test/Helpers/MapDataContextHelperTest.cs'.
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