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diff --git a/bundles/org.simantics.databoard/testcases/org/simantics/databoard/tests/TestClone.java b/bundles/org.simantics.databoard/testcases/org/simantics/databoard/tests/TestClone.java
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+/*******************************************************************************
+ *  Copyright (c) 2010 Association for Decentralized Information Management in
+ *  Industry THTH ry.
+ *  All rights reserved. This program and the accompanying materials
+ *  are made available under the terms of the Eclipse Public License v1.0
+ *  which accompanies this distribution, and is available at
+ *  http://www.eclipse.org/legal/epl-v10.html
+ *
+ *  Contributors:
+ *      VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.databoard.tests;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Random;
+
+import org.junit.Test;
+import org.simantics.databoard.Bindings;
+import org.simantics.databoard.binding.ArrayBinding;
+import org.simantics.databoard.binding.Binding;
+import org.simantics.databoard.binding.MapBinding;
+import org.simantics.databoard.binding.OptionalBinding;
+import org.simantics.databoard.binding.RecordBinding;
+import org.simantics.databoard.binding.UnionBinding;
+import org.simantics.databoard.binding.VariantBinding;
+import org.simantics.databoard.binding.util.RandomValue;
+import org.simantics.databoard.type.Datatype;
+
+/**
+ * Test Clone is a test case that asserts that {@link Bindings#clone(Object, Binding, Binding)}
+ * returns two separate instances.
+ * 
+ * Also tests that adapt of same binding returns the same instance. 
+ *
+ * @author Toni Kalajainen <toni.kalajainen@vtt.fi>
+ */
+public class TestClone {
+	
+	public @Test void testGenericBinding() throws Exception {		
+		RandomValue rv = new RandomValue();
+		rv.refereableRecords = true;
+		for (int i=0; i<10000; i++) {
+			rv.random = new Random(i);
+			rv.random.nextLong();
+			Datatype type = rv.randomType(0, 3);
+			Binding binding = Bindings.getMutableBinding(type);
+			Object o1 = binding.accept(rv);
+			Object o2 = binding.clone(o1);
+			System.out.println(i+": "+type);
+			if (binding.equals(o1, o2)) continue;
+			assertNotSameInstance(binding, o1, o2);
+			
+			Object o3 = Bindings.adapt(o1, binding, binding);
+			assertTrue( o3 == o1 );
+		}		
+	}
+	
+	public void assertNotSameInstance(Binding b, Object o1, Object o2) throws Exception {
+		assertTrue(b.isImmutable() || o1 != o2);
+		
+		if (b instanceof RecordBinding) assertNotSameRecord((RecordBinding) b, o1, o2);
+		if (b instanceof UnionBinding) assertNotSameUnion((UnionBinding) b, o1, o2);
+		if (b instanceof ArrayBinding) assertNotSameArray((ArrayBinding) b, o1, o2);
+		if (b instanceof MapBinding) assertNotSameMap((MapBinding) b, o1, o2);
+		if (b instanceof OptionalBinding) assertNotSameOptional((OptionalBinding) b, o1, o2);
+		if (b instanceof VariantBinding) assertNotSameVariant((VariantBinding) b, o1, o2);
+	}
+	
+	public void assertNotSameArray(ArrayBinding b, Object o1, Object o2) throws Exception {
+		int count = b.size(o1);
+		Binding cb = b.getComponentBinding();
+		for (int i=0; i<count; i++) {
+			Object v1 = b.get(o1, i);
+			Object v2 = b.get(o2, i);
+			assertNotSameInstance(cb, v1, v2);
+		}
+	}
+
+	public void assertNotSameMap(MapBinding b, Object o1, Object o2) throws Exception {
+		int count = b.size(o1);
+		Binding vb = b.getValueBinding();
+		Object values1[] = b.getValues(o1);  
+		Object values2[] = b.getValues(o2);  
+		for (int i=0; i<count; i++) {
+			Object v1 = values1[i];
+			Object v2 = values2[i];
+			assertNotSameInstance(vb, v1, v2);
+		}		
+	}
+
+	public void assertNotSameOptional(OptionalBinding b, Object o1, Object o2) throws Exception {
+		Binding cb = b.getComponentBinding();
+		Object v1 = b.getValue(o1);
+		Object v2 = b.getValue(o2);
+		assertNotSameInstance(cb, v1, v2);
+	}
+
+	public void assertNotSameVariant(VariantBinding b, Object o1, Object o2) throws Exception {
+		Binding cb = b.getContentBinding(o1);
+		Object v1 = b.getContent(o1);
+		Object v2 = b.getContent(o2);
+		assertNotSameInstance(cb, v1, v2);		
+	}
+
+	public void assertNotSameRecord(RecordBinding b, Object o1, Object o2) throws Exception {
+		int count = b.getComponentCount();
+		for (int i=0; i<count; i++) {
+			Binding cb = b.getComponentBinding(i);
+			Object v1 = b.getComponent(o1, i);
+			Object v2 = b.getComponent(o2, i);
+			assertNotSameInstance(cb, v1, v2);
+		}	
+	}
+
+	public void assertNotSameUnion(UnionBinding b, Object o1, Object o2) throws Exception {
+		int tag = b.getTag(o1);
+		assertEquals(tag, b.getTag(o2));
+		Binding cb = b.getComponentBinding(tag);
+		Object v1 = b.getValue(o1);
+		Object v2 = b.getValue(o2);		
+		assertNotSameInstance(cb, v1, v2);
+	}
+
+}
+