HONEYCOMB-350 - APPEAR/DISAPPEAR modification handling

Allows these types of modifications to check in depth,
to see if some of their children nodes were not modified

Change-Id: Ice2f988732c2d9ecad8e960c4f10d01863fb0cfd
Signed-off-by: Jan Srnicek <jsrnicek@cisco.com>

7 files changed, 940 insertions, 180 deletions

diff --git a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModifiableDataTreeDelegatorTest.java b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModifiableDataTreeDelegatorTest.java
index 26a936f23..432833be3 100644
--- a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModifiableDataTreeDelegatorTest.java
+++ b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModifiableDataTreeDelegatorTest.java
@@ -64,7 +64,7 @@ import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
 
-public class ModifiableDataTreeDelegatorTest {
+public class ModifiableDataTreeDelegatorTest extends ModificationBaseTest {
 
     @Mock
     private WriterRegistry writer;
@@ -90,7 +90,7 @@ public class ModifiableDataTreeDelegatorTest {
     @Before
     public void setUp() throws Exception {
         initMocks(this);
-        dataTree = ModificationDiffTest.getDataTree();
+        dataTree = getDataTree();
         when(contextBroker.newReadWriteTransaction()).thenReturn(tx);
         when(tx.submit()).thenReturn(Futures.immediateCheckedFuture(null));
 
@@ -98,39 +98,39 @@ public class ModifiableDataTreeDelegatorTest {
         final Map.Entry<InstanceIdentifier<?>, DataObject> parsed = new AbstractMap.SimpleEntry<>(DEFAULT_ID, DEFAULT_DATA_OBJECT);
         when(serializer.fromNormalizedNode(any(YangInstanceIdentifier.class), any(NormalizedNode.class))).thenReturn(parsed);
 
-        configDataTree = new ModifiableDataTreeDelegator(serializer, dataTree, ModificationDiffTest.getSchemaCtx(), writer, contextBroker);
+        configDataTree = new ModifiableDataTreeDelegator(serializer, dataTree, getSchemaCtx(), writer, contextBroker);
     }
 
     @Test
     public void testRead() throws Exception {
-        final ContainerNode topContainer = ModificationDiffTest.getTopContainer("topContainer");
-        ModificationDiffTest.addNodeToTree(dataTree, topContainer, ModificationDiffTest.TOP_CONTAINER_ID);
+        final ContainerNode topContainer = getTopContainer("topContainer");
+        addNodeToTree(dataTree, topContainer, TOP_CONTAINER_ID);
         final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read =
-                configDataTree.read(ModificationDiffTest.TOP_CONTAINER_ID);
+                configDataTree.read(TOP_CONTAINER_ID);
         final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read2 =
-                configDataTree.newModification().read(ModificationDiffTest.TOP_CONTAINER_ID);
+                configDataTree.newModification().read(TOP_CONTAINER_ID);
         final Optional<NormalizedNode<?, ?>> normalizedNodeOptional = read.get();
         final Optional<NormalizedNode<?, ?>> normalizedNodeOptional2 = read2.get();
 
         assertEquals(normalizedNodeOptional, normalizedNodeOptional2);
         assertTrue(normalizedNodeOptional.isPresent());
         assertEquals(topContainer, normalizedNodeOptional.get());
-        assertEquals(dataTree.takeSnapshot().readNode(ModificationDiffTest.TOP_CONTAINER_ID), normalizedNodeOptional);
+        assertEquals(dataTree.takeSnapshot().readNode(TOP_CONTAINER_ID), normalizedNodeOptional);
     }
 
     @Test
     public void testCommitSuccessful() throws Exception {
-        final MapNode nestedList = ModificationDiffTest.getNestedList("listEntry", "listValue");
+        final MapNode nestedList = getNestedList("listEntry", "listValue");
 
         final DataModification dataModification = configDataTree.newModification();
-        dataModification.write(ModificationDiffTest.NESTED_LIST_ID, nestedList);
+        dataModification.write(NESTED_LIST_ID, nestedList);
         dataModification.validate();
         dataModification.commit();
 
         final Multimap<InstanceIdentifier<?>, DataObjectUpdate> map = HashMultimap.create();
         map.put(DEFAULT_ID, DataObjectUpdate.create(DEFAULT_ID, DEFAULT_DATA_OBJECT, DEFAULT_DATA_OBJECT));
         verify(writer).update(eq(new WriterRegistry.DataObjectUpdates(map, ImmutableMultimap.of())), any(WriteContext.class));
-        assertEquals(nestedList, dataTree.takeSnapshot().readNode(ModificationDiffTest.NESTED_LIST_ID).get());
+        assertEquals(nestedList, dataTree.takeSnapshot().readNode(NESTED_LIST_ID).get());
     }
 
     private static DataObject mockDataObject(final String name, final Class<? extends DataObject> classToMock) {
@@ -141,7 +141,7 @@ public class ModifiableDataTreeDelegatorTest {
 
     @Test
     public void testCommitUndoSuccessful() throws Exception {
-        final MapNode nestedList = ModificationDiffTest.getNestedList("listEntry", "listValue");
+        final MapNode nestedList = getNestedList("listEntry", "listValue");
 
         // Fail on update:
         final WriterRegistry.Reverter reverter = mock(WriterRegistry.Reverter.class);
@@ -152,7 +152,7 @@ public class ModifiableDataTreeDelegatorTest {
         try {
             // Run the test
             final DataModification dataModification = configDataTree.newModification();
-            dataModification.write(ModificationDiffTest.NESTED_LIST_ID, nestedList);
+            dataModification.write(NESTED_LIST_ID, nestedList);
             dataModification.validate();
             dataModification.commit();
             fail("WriterRegistry.RevertSuccessException was expected");
@@ -165,7 +165,7 @@ public class ModifiableDataTreeDelegatorTest {
 
     @Test
     public void testCommitUndoFailed() throws Exception {
-        final MapNode nestedList = ModificationDiffTest.getNestedList("listEntry", "listValue");
+        final MapNode nestedList = getNestedList("listEntry", "listValue");
 
         // Fail on update:
         final WriterRegistry.Reverter reverter = mock(WriterRegistry.Reverter.class);
@@ -182,7 +182,7 @@ public class ModifiableDataTreeDelegatorTest {
         try {
             // Run the test
             final DataModification dataModification = configDataTree.newModification();
-            dataModification.write(ModificationDiffTest.NESTED_LIST_ID, nestedList);
+            dataModification.write(NESTED_LIST_ID, nestedList);
             dataModification.validate();
             dataModification.commit();
             fail("WriterRegistry.Reverter.RevertFailedException was expected");
@@ -201,14 +201,14 @@ public class ModifiableDataTreeDelegatorTest {
     public void testToBindingAware() throws Exception {
         when(serializer.fromNormalizedNode(any(YangInstanceIdentifier.class), eq(null))).thenReturn(null);
 
-        final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> biNodes = new HashMap<>();
+        final Map<YangInstanceIdentifier, NormalizedNodeUpdate> biNodes = new HashMap<>();
         // delete
         final QName nn1 = QName.create("namespace", "nn1");
         final YangInstanceIdentifier yid1 = mockYid(nn1);
         final InstanceIdentifier iid1 = mockIid(yid1, DataObject1.class);
         final NormalizedNode nn1B = mockNormalizedNode(nn1);
         final DataObject1 do1B = mockDataObject(yid1, iid1, nn1B, DataObject1.class);
-        biNodes.put(yid1, ModificationDiff.NormalizedNodeUpdate.create(yid1, nn1B, null));
+        biNodes.put(yid1, NormalizedNodeUpdate.create(yid1, nn1B, null));
 
         // create
         final QName nn2 = QName.create("namespace", "nn1");
@@ -216,7 +216,7 @@ public class ModifiableDataTreeDelegatorTest {
         final InstanceIdentifier iid2 = mockIid(yid2, DataObject2.class);;
         final NormalizedNode nn2A = mockNormalizedNode(nn2);
         final DataObject2 do2A = mockDataObject(yid2, iid2, nn2A, DataObject2.class);
-        biNodes.put(yid2, ModificationDiff.NormalizedNodeUpdate.create(yid2, null, nn2A));
+        biNodes.put(yid2, NormalizedNodeUpdate.create(yid2, null, nn2A));
 
         // update
         final QName nn3 = QName.create("namespace", "nn1");
@@ -226,7 +226,7 @@ public class ModifiableDataTreeDelegatorTest {
         final DataObject3 do3B = mockDataObject(yid3, iid3, nn3B, DataObject3.class);
         final NormalizedNode nn3A = mockNormalizedNode(nn3);
         final DataObject3 do3A = mockDataObject(yid3, iid3, nn3A, DataObject3.class);;
-        biNodes.put(yid3, ModificationDiff.NormalizedNodeUpdate.create(yid3, nn3B, nn3A));
+        biNodes.put(yid3, NormalizedNodeUpdate.create(yid3, nn3B, nn3A));
 
         final WriterRegistry.DataObjectUpdates dataObjectUpdates =
                 ModifiableDataTreeDelegator.toBindingAware(biNodes, serializer);
diff --git a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationBaseTest.java b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationBaseTest.java
new file mode 100644
index 000000000..c7d78faf6
--- /dev/null
+++ b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationBaseTest.java
@@ -0,0 +1,367 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fd.honeycomb.data.impl;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+import static org.junit.Assert.assertTrue;
+
+import java.util.Arrays;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
+import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
+import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
+import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateTip;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
+import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
+import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
+import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.ListNodeBuilder;
+import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
+import org.opendaylight.yangtools.yang.model.api.SchemaContext;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
+import org.opendaylight.yangtools.yang.parser.stmt.reactor.CrossSourceStatementReactor;
+import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.YangInferencePipeline;
+import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.YangStatementSourceImpl;
+
+abstract class ModificationBaseTest extends ModificationMetadata {
+
+    void addNodeToTree(final DataTree dataTree, final NormalizedNode<?, ?> node,
+                       final YangInstanceIdentifier id)
+            throws DataValidationFailedException {
+        DataTreeSnapshot dataTreeSnapshot = dataTree.takeSnapshot();
+        DataTreeModification dataTreeModification = dataTreeSnapshot.newModification();
+        dataTreeModification.write(id, node);
+        dataTreeModification.ready();
+        dataTree.validate(dataTreeModification);
+        DataTreeCandidate prepare = dataTree.prepare(dataTreeModification);
+        dataTree.commit(prepare);
+    }
+
+    protected TipProducingDataTree getDataTree() throws ReactorException {
+        final TipProducingDataTree dataTree = InMemoryDataTreeFactory.getInstance().create(TreeType.CONFIGURATION);
+        dataTree.setSchemaContext(getSchemaCtx());
+        return dataTree;
+    }
+
+    ContainerNode getTopContainer(final String stringValue) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(ImmutableNodes.leafNode(STRING_LEAF_QNAME, stringValue))
+                .build();
+    }
+
+    ContainerNode getTopContainerWithLeafList(final String... stringValue) {
+        final ListNodeBuilder<String, LeafSetEntryNode<String>> leafSetBuilder = Builders.leafSetBuilder();
+        for (final String value : stringValue) {
+            leafSetBuilder.withChild(Builders.<String>leafSetEntryBuilder()
+                    .withNodeIdentifier(new YangInstanceIdentifier.NodeWithValue<>(NESTED_LEAF_LIST_QNAME, value))
+                    .withValue(value)
+                    .build());
+        }
+
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(Builders.containerBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(FOR_LEAF_LIST_QNAME))
+                        .withChild(leafSetBuilder
+                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_LEAF_LIST_QNAME))
+                                .build())
+                        .build())
+                .build();
+    }
+
+    MapNode getNestedList(final String listItemName, final String text) {
+        return Builders.mapBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_LIST_QNAME))
+                .withChild(
+                        Builders.mapEntryBuilder()
+                                .withNodeIdentifier(
+                                        new YangInstanceIdentifier.NodeIdentifierWithPredicates(NESTED_LIST_QNAME,
+                                                NAME_LEAF_QNAME, listItemName))
+                                .withChild(ImmutableNodes.leafNode(NAME_LEAF_QNAME, listItemName))
+                                .withChild(ImmutableNodes.leafNode(TEXT_LEAF_QNAME, text))
+                                .build()
+                )
+                .build();
+    }
+
+    MapNode getDeepList(final String listItemName) {
+        return Builders.mapBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(DEEP_LIST_QNAME))
+                .withChild(
+                        Builders.mapEntryBuilder()
+                                .withNodeIdentifier(
+                                        new YangInstanceIdentifier.NodeIdentifierWithPredicates(DEEP_LIST_QNAME,
+                                                NAME_LEAF_QNAME, listItemName))
+                                .withChild(ImmutableNodes.leafNode(NAME_LEAF_QNAME, listItemName))
+                                .build()
+                )
+                .build();
+    }
+
+    SchemaContext getSchemaCtx() throws ReactorException {
+        final CrossSourceStatementReactor.BuildAction buildAction = YangInferencePipeline.RFC6020_REACTOR.newBuild();
+        buildAction.addSource(
+                new YangStatementSourceImpl(ModificationDiffTest.class.getResourceAsStream("/test-diff.yang")));
+        return buildAction.buildEffective();
+    }
+
+    DataTreeModification getModification(final TipProducingDataTree dataTree) {
+        final DataTreeSnapshot dataTreeSnapshot = dataTree.takeSnapshot();
+        return dataTreeSnapshot.newModification();
+    }
+
+
+    DataTreeCandidateTip prepareModification(final TipProducingDataTree dataTree,
+                                             final DataTreeModification dataTreeModification)
+            throws DataValidationFailedException {
+        dataTreeModification.ready();
+        dataTree.validate(dataTreeModification);
+        return dataTree.prepare(dataTreeModification);
+    }
+
+    ModificationDiff getModificationDiff(final DataTreeCandidateTip prepare) throws ReactorException {
+        return new ModificationDiff.ModificationDiffBuilder()
+                .setCtx(getSchemaCtx())
+                .build(prepare.getRootNode());
+    }
+
+    NormalizedNodeUpdate getNormalizedNodeUpdateForAfterType(
+            final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates,
+            final Class<? extends NormalizedNode<?, ?>> containerNodeClass) {
+        return updates.values().stream()
+                .filter(update -> containerNodeClass.isAssignableFrom(update.getDataAfter().getClass()))
+                .findFirst().get();
+    }
+
+    NormalizedNodeUpdate getNormalizedNodeUpdateForBeforeType(
+            final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates,
+            final Class<? extends NormalizedNode<?, ?>> containerNodeClass) {
+        return updates.values().stream()
+                .filter(update -> containerNodeClass.isAssignableFrom(update.getDataBefore().getClass()))
+                .findFirst().get();
+    }
+
+    void assertUpdate(final NormalizedNodeUpdate update,
+                      final YangInstanceIdentifier idExpected,
+                      final NormalizedNode<?, ?> beforeExpected,
+                      final NormalizedNode<?, ?> afterExpected) {
+        assertThat(update.getId(), is(idExpected));
+        assertThat(update.getDataBefore(), is(beforeExpected));
+        assertThat(update.getDataAfter(), is(afterExpected));
+    }
+
+
+    ContainerNode getNestedContainerWithLeafList(final String... stringValue) {
+        final ListNodeBuilder<String, LeafSetEntryNode<String>> leafSetBuilder = Builders.leafSetBuilder();
+        for (final String value : stringValue) {
+            leafSetBuilder.withChild(Builders.<String>leafSetEntryBuilder()
+                    .withNodeIdentifier(new YangInstanceIdentifier.NodeWithValue<>(NESTED_CONTAINER_LEAF_LIST, value))
+                    .withValue(value)
+                    .build());
+        }
+
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(leafSetBuilder
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_LEAF_LIST))
+                        .build())
+                .build();
+    }
+
+    ContainerNode getNestedContainerWithChoice(final String caseLeafValue) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.choiceBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CHOICE))
+                        .withChild(Builders.leafBuilder()
+                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(UNDER_NESTED_CASE))
+                                .withValue(caseLeafValue)
+                                .build()).build())
+                .build();
+    }
+
+    MapEntryNode getNestedListEntry(final String listItemName, final String text) {
+        return Builders.mapEntryBuilder()
+                .withNodeIdentifier(
+                        new YangInstanceIdentifier.NodeIdentifierWithPredicates(NESTED_LIST_QNAME,
+                                NAME_LEAF_QNAME, listItemName))
+                .withChild(ImmutableNodes.leafNode(NAME_LEAF_QNAME, listItemName))
+                .withChild(ImmutableNodes.leafNode(TEXT_LEAF_QNAME, text))
+                .build();
+    }
+
+    MapEntryNode getNestedListInContainerEntry(final String listItemName) {
+        return Builders.mapEntryBuilder()
+                .withNodeIdentifier(
+                        new YangInstanceIdentifier.NodeIdentifierWithPredicates(NESTED_LIST_IN_CONTAINER_QNAME,
+                                IN_CONTAINER_NAME_LEAF_QNAME, listItemName))
+                .withChild(ImmutableNodes.leafNode(IN_CONTAINER_NAME_LEAF_QNAME, listItemName))
+                .build();
+    }
+
+    MapNode getNestedList(MapEntryNode... entries) {
+        return Builders.mapBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_LIST_QNAME))
+                .withValue(Arrays.asList(entries))
+                .build();
+    }
+
+    MapNode getNestedListInContainer(MapEntryNode... entries) {
+        return Builders.mapBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_LIST_IN_CONTAINER_QNAME))
+                .withValue(Arrays.asList(entries))
+                .build();
+    }
+
+    ContainerNode getNestedContWithLeafUnderAug(String value) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.leafBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_LEAF))
+                        .withValue(value).build()).build();
+    }
+
+    ContainerNode getNestedContWithListUnderAug(String value) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.mapBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_LIST))
+                        .withChild(Builders.mapEntryBuilder()
+                                .withNodeIdentifier(
+                                        new YangInstanceIdentifier.NodeIdentifierWithPredicates(AUG_LIST, AUG_LIST_KEY,
+                                                value))
+                                .build())
+                        .build()).build();
+    }
+
+    ContainerNode getNestedContWithContUnderAug(String value) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.containerBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_CONTAINER))
+                        .withChild(Builders.leafBuilder()
+                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_CONTAINER_LEAF))
+                                .withValue(value)
+                                .build())
+                        .build()).build();
+    }
+
+    ContainerNode getNestedContWithLeafListUnderAug(String value) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.leafSetBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_LEAFLIST))
+                        .withChildValue(value)
+                        .build()).build();
+    }
+
+    ContainerNode getNestedContWithContainerUnderNestedAug(String value) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.containerBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_CONTAINER))
+                        .withChild(Builders.containerBuilder()
+                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_AUG_CONTAINER))
+                                .withChild(Builders.leafBuilder()
+                                        .withNodeIdentifier(
+                                                new YangInstanceIdentifier.NodeIdentifier(NESTED_AUG_CONTAINER_LEAF))
+                                        .withValue(value)
+                                        .build()).build()).build()).build();
+    }
+
+    ContainerNode getNestedContWithLeafListUnderNestedAug(String value) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.containerBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_CONTAINER))
+                        .withChild(Builders.leafSetBuilder()
+                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_AUG_LEAF_LIST))
+                                .withChildValue(value)
+                                .build()).build()).build();
+    }
+
+    ContainerNode getNestedContWithLeafUnderNestedAug(String value) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.containerBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_CONTAINER))
+                        .withChild(Builders.leafBuilder()
+                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_AUG_LEAF))
+                                .withValue(value)
+                                .build()).build()).build();
+    }
+
+    ContainerNode getNestedContWithListUnderNestedAug(String value) {
+        return Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                .withChild(Builders.containerBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(AUG_CONTAINER))
+                        .withChild(Builders.mapBuilder()
+                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_AUG_LIST))
+                                .withChild(Builders.mapEntryBuilder()
+                                        .withNodeIdentifier(
+                                                new YangInstanceIdentifier.NodeIdentifierWithPredicates(NESTED_AUG_LIST,
+                                                        NESTED_AUG_LIST_KEY, value)).build())
+                                .build()).build()).build();
+    }
+
+    TipProducingDataTree prepareStateBeforeWithTopContainer(final NormalizedNode<?, ?> topContainerData)
+            throws ReactorException, DataValidationFailedException {
+        final TipProducingDataTree dataTree = getDataTree();
+        final DataTreeModification dataTreeModificationOriginal = getModification(dataTree);
+        // non presence, but with valid child list
+        dataTreeModificationOriginal.write(TOP_CONTAINER_ID, topContainerData);
+        final DataTreeCandidateTip prepare = prepareModification(dataTree, dataTreeModificationOriginal);
+        dataTree.commit(prepare);
+        return dataTree;
+    }
+
+    DataTreeCandidateTip prepareStateAfterEmpty(final TipProducingDataTree dataTree)
+            throws DataValidationFailedException {
+        final NormalizedNode<?, ?> topContainerModified = Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .build();
+        final DataTreeModification dataTreeModificationModified = getModification(dataTree);
+        dataTreeModificationModified.write(TOP_CONTAINER_ID, topContainerModified);
+        return prepareModification(dataTree, dataTreeModificationModified);
+    }
+
+    void assertCollectionContainsOnlyDeletes(final ModificationDiff modificationDiff) {
+        assertTrue(modificationDiff.getUpdates().entrySet().stream().map(Map.Entry::getValue)
+                .map(NormalizedNodeUpdate::getDataAfter)
+                .filter(Objects::nonNull).collect(Collectors.toList()).isEmpty());
+    }
+
+    void assertNodeModificationPresent(final ModificationDiff modificationDiff, final Set<QName> expected) {
+        assertTrue(modificationDiff.getUpdates().values().stream()
+                .allMatch(update -> expected.contains(update.getId().getLastPathArgument().getNodeType())));
+    }
+}
diff --git a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffAugRewriteDeleteTest.java b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffAugRewriteDeleteTest.java
new file mode 100644
index 000000000..c2b959809
--- /dev/null
+++ b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffAugRewriteDeleteTest.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fd.honeycomb.data.impl;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+import com.google.common.collect.ImmutableSet;
+import org.junit.Test;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateTip;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
+import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ModificationDiffAugRewriteDeleteTest extends ModificationBaseTest {
+
+    private static final Logger LOG = LoggerFactory.getLogger(ModificationDiffAugRewriteDeleteTest.class);
+
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerAugWithLeaf()
+            throws ReactorException, DataValidationFailedException {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedContWithLeafUnderAug("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(AUG_LEAF));
+    }
+
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerAugWithList()
+            throws ReactorException, DataValidationFailedException {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedContWithListUnderAug("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(AUG_LIST));
+    }
+
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerAugWithNonPresenceContainer()
+            throws ReactorException, DataValidationFailedException {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedContWithContUnderAug("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(AUG_CONTAINER_LEAF));
+    }
+
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerAugWithLeafList()
+            throws ReactorException, DataValidationFailedException {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedContWithLeafListUnderAug("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(AUG_LEAFLIST));
+    }
+}
diff --git a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffNestedAugRewriteDeleteTest.java b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffNestedAugRewriteDeleteTest.java
new file mode 100644
index 000000000..9c92b4f85
--- /dev/null
+++ b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffNestedAugRewriteDeleteTest.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fd.honeycomb.data.impl;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+import com.google.common.collect.ImmutableSet;
+import org.junit.Test;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateTip;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
+import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
+import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ModificationDiffNestedAugRewriteDeleteTest extends ModificationBaseTest {
+
+    private static final Logger LOG = LoggerFactory.getLogger(ModificationDiffNestedAugRewriteDeleteTest.class);
+
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerNestedAugWithContainer()
+            throws DataValidationFailedException, ReactorException {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedContWithContainerUnderNestedAug("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_AUG_CONTAINER_LEAF));
+    }
+
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerNestedAugWithLeafList()
+            throws DataValidationFailedException, ReactorException {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedContWithLeafListUnderNestedAug("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_AUG_LEAF_LIST));
+    }
+
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerNestedAugWithList()
+            throws DataValidationFailedException, ReactorException {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedContWithListUnderNestedAug("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_AUG_LIST));
+    }
+
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerNestedAugWithLeaf()
+            throws DataValidationFailedException, ReactorException {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedContWithLeafUnderNestedAug("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_AUG_LEAF));
+    }
+}
diff --git a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffRewriteDeleteTest.java b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffRewriteDeleteTest.java
new file mode 100644
index 000000000..a1ede9691
--- /dev/null
+++ b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffRewriteDeleteTest.java
@@ -0,0 +1,173 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fd.honeycomb.data.impl;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+import com.google.common.collect.ImmutableSet;
+import org.junit.Test;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateTip;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
+import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class ModificationDiffRewriteDeleteTest extends ModificationBaseTest {
+
+    private static final Logger LOG = LoggerFactory.getLogger(ModificationDiffRewriteDeleteTest.class);
+
+    /**
+     * Covers case when non-presence container was already filled with some data,
+     * and modification removes data by overriding by empty list
+     */
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerPreviousDataOverrideByEmpty() throws Exception {
+        final MapEntryNode alreadyPresent = getNestedListEntry("value", "txt");
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedList(alreadyPresent))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_LIST_QNAME));
+    }
+
+    /**
+     * Covers case when non-presence container was already filled with some data,
+     * and modification removes data by overriding by empty list. This case tests
+     * when there are multiple nested non-presence containers
+     */
+    @Test
+    public void testWriteNonPresenceMultipleNonEmptyContainerPreviousDataOverrideByEmpty() throws Exception {
+        final MapEntryNode alreadyPresent = getNestedListInContainerEntry("key");
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                // another non-presence container with list entry
+                .withChild(Builders.containerBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                        .withChild(getNestedListInContainer(alreadyPresent))
+                        .build())
+                // direct list entry
+                .withChild(getNestedList(alreadyPresent))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect two new entries
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(2));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff,
+                ImmutableSet.of(NESTED_LIST_IN_CONTAINER_QNAME, NESTED_LIST_QNAME));
+    }
+
+    /**
+     * Covers case when non-presence container was already filled with some data,
+     * and modification removes data by overriding. Tests case with leaf
+     */
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerLeaf() throws Exception {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                // another non-presence container with leaf
+                .withChild(Builders.containerBuilder()
+                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_QNAME))
+                        .withChild(Builders.leafBuilder()
+                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_CONTAINER_VAL))
+                                .withValue("val").build())
+                        .build())
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_CONTAINER_VAL));
+    }
+
+    /**
+     * Covers case when non-presence container was already filled with some data,
+     * and modification removes data by overriding. Tests case with leaf-list
+     */
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerLeafList() throws Exception {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                // another non-presence container with leaf
+                .withChild(getNestedContainerWithLeafList())
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_CONTAINER_LEAF_LIST));
+    }
+
+    /**
+     * Covers case when non-presence container was already filled with some data,
+     * and modification removes data by overriding. Tests case with choice/case
+     */
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerWithChoice() throws Exception {
+        final TipProducingDataTree dataTree = prepareStateBeforeWithTopContainer(Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                // another non-presence container with leaf
+                .withChild(getNestedContainerWithChoice("val"))
+                .build());
+        // now we have state with some data
+
+        // just empty non presence container
+        final DataTreeCandidateTip prepareModified = prepareStateAfterEmpty(dataTree);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        // is delete
+        assertCollectionContainsOnlyDeletes(modificationDiff);
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(UNDER_NESTED_CASE));
+    }
+}
diff --git a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffTest.java b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffTest.java
index 664b57378..cd980dd1e 100644
--- a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffTest.java
+++ b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationDiffTest.java
@@ -23,59 +23,26 @@ import static org.junit.Assert.assertThat;
 import static org.junit.Assert.assertTrue;
 
 import com.google.common.base.Optional;
+import com.google.common.collect.ImmutableSet;
 import java.util.Map;
 import org.junit.Test;
-import org.opendaylight.yangtools.yang.common.QName;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
 import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
-import org.opendaylight.yangtools.yang.data.api.schema.LeafSetEntryNode;
 import org.opendaylight.yangtools.yang.data.api.schema.MapEntryNode;
 import org.opendaylight.yangtools.yang.data.api.schema.MapNode;
 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateTip;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
 import org.opendaylight.yangtools.yang.data.api.schema.tree.TipProducingDataTree;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.TreeType;
 import org.opendaylight.yangtools.yang.data.impl.schema.Builders;
 import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
-import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.ListNodeBuilder;
-import org.opendaylight.yangtools.yang.data.impl.schema.tree.InMemoryDataTreeFactory;
-import org.opendaylight.yangtools.yang.model.api.SchemaContext;
-import org.opendaylight.yangtools.yang.parser.spi.meta.ReactorException;
-import org.opendaylight.yangtools.yang.parser.stmt.reactor.CrossSourceStatementReactor;
-import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.YangInferencePipeline;
-import org.opendaylight.yangtools.yang.parser.stmt.rfc6020.YangStatementSourceImpl;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-public class ModificationDiffTest {
+public class ModificationDiffTest extends ModificationBaseTest {
 
-    static final QName TOP_CONTAINER_QNAME =
-            QName.create("urn:opendaylight:params:xml:ns:yang:test:diff", "2015-01-05", "top-container");
-    static final QName STRING_LEAF_QNAME = QName.create(TOP_CONTAINER_QNAME, "string");
-    static final QName NAME_LEAF_QNAME = QName.create(TOP_CONTAINER_QNAME, "name");
-    static final QName TEXT_LEAF_QNAME = QName.create(TOP_CONTAINER_QNAME, "text");
-    static final QName NESTED_LIST_QNAME = QName.create(TOP_CONTAINER_QNAME, "nested-list");
-    static final QName DEEP_LIST_QNAME = QName.create(TOP_CONTAINER_QNAME, "deep-list");
-    static final QName EMPTY_QNAME = QName.create(TOP_CONTAINER_QNAME, "empty");
-    static final QName IN_EMPTY_QNAME = QName.create(TOP_CONTAINER_QNAME, "in-empty");
-
-    static final QName FOR_LEAF_LIST_QNAME = QName.create(TOP_CONTAINER_QNAME, "for-leaf-list");
-    static final QName NESTED_LEAF_LIST_QNAME = QName.create(TOP_CONTAINER_QNAME, "nested-leaf-list");
-
-
-    static final QName WITH_CHOICE_CONTAINER_QNAME =
-            QName.create("urn:opendaylight:params:xml:ns:yang:test:diff", "2015-01-05", "with-choice");
-    static final QName CHOICE_QNAME = QName.create(WITH_CHOICE_CONTAINER_QNAME, "choice");
-    static final QName IN_CASE1_LEAF_QNAME = QName.create(WITH_CHOICE_CONTAINER_QNAME, "in-case1");
-    static final QName IN_CASE2_LEAF_QNAME = QName.create(WITH_CHOICE_CONTAINER_QNAME, "in-case2");
-
-    static final QName PRESENCE_CONTAINER_QNAME = QName.create(TOP_CONTAINER_QNAME, "presence");
-
-    static final YangInstanceIdentifier TOP_CONTAINER_ID = YangInstanceIdentifier.of(TOP_CONTAINER_QNAME);
-    static final YangInstanceIdentifier NESTED_LIST_ID = TOP_CONTAINER_ID.node(new YangInstanceIdentifier.NodeIdentifier(NESTED_LIST_QNAME));
+    private static final Logger LOG = LoggerFactory.getLogger(ModificationDiffTest.class);
 
     @Test
     public void testInitialWrite() throws Exception {
@@ -150,17 +117,14 @@ public class ModificationDiffTest {
         dataTreeModification.write(WITH_CHOICE_CONTAINER_ID, containerWithChoice);
         final DataTreeCandidateTip prepare = prepareModification(dataTree, dataTreeModification);
 
-        final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
+        final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
 
         assertThat(updates.size(), is(1));
         assertUpdate(getNormalizedNodeUpdateForAfterType(updates, ContainerNode.class),
                 WITH_CHOICE_CONTAINER_ID, null, containerWithChoice);
     }
 
-    private DataTreeModification getModification(final TipProducingDataTree dataTree) {
-        final DataTreeSnapshot dataTreeSnapshot = dataTree.takeSnapshot();
-        return dataTreeSnapshot.newModification();
-    }
+
 
     @Test
     public void testWriteNonPresenceEmptyContainer() throws Exception {
@@ -175,6 +139,65 @@ public class ModificationDiffTest {
         assertThat(modificationDiff.getUpdates().size(), is(0));
     }
 
+    /**
+     * Covers case when both non-presence and nested is not present
+     */
+    @Test
+    public void testWriteNonPresenceNonEmptyContainer() throws Exception {
+        final TipProducingDataTree dataTree = getDataTree();
+        final DataTreeModification dataTreeModification = getModification(dataTree);
+        // non presence ,but with valid child list
+        final NormalizedNode<?, ?> topContainer = Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedList("value","txt"))
+                .build();
+
+        dataTreeModification.write(TOP_CONTAINER_ID, topContainer);
+        final DataTreeCandidateTip prepare = prepareModification(dataTree, dataTreeModification);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepare);
+
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_LIST_QNAME));
+    }
+
+    /**
+     * Covers case when non-presence container was already filled with some data,
+     * and modification just ads some other nested data
+     */
+    @Test
+    public void testWriteNonPresenceNonEmptyContainerPreviousData() throws Exception {
+        final TipProducingDataTree dataTree = getDataTree();
+        final DataTreeModification dataTreeModificationOriginal = getModification(dataTree);
+        // non presence, but with valid child list
+        final MapEntryNode alreadyPresent = getNestedListEntry("value", "txt");
+        final NormalizedNode<?, ?> topContainerOriginal = Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedList(alreadyPresent))
+                .build();
+
+        dataTreeModificationOriginal.write(TOP_CONTAINER_ID, topContainerOriginal);
+        final DataTreeCandidateTip prepare = prepareModification(dataTree, dataTreeModificationOriginal);
+        dataTree.commit(prepare);
+        // now we have state with some data
+
+        final MapEntryNode newEntry = getNestedListEntry("value2", "txt2");
+        final NormalizedNode<?, ?> topContainerModified = Builders.containerBuilder()
+                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
+                .withChild(getNestedList(alreadyPresent, newEntry))
+                .build();
+        final DataTreeModification dataTreeModificationModified = getModification(dataTree);
+        dataTreeModificationModified.write(TOP_CONTAINER_ID, topContainerModified);
+        final DataTreeCandidateTip prepareModified = prepareModification(dataTree, dataTreeModificationModified);
+
+        final ModificationDiff modificationDiff = getModificationDiff(prepareModified);
+        // should detect one new entry
+        LOG.debug(modificationDiff.toString());
+        assertThat(modificationDiff.getUpdates().size(), is(1));
+        assertNodeModificationPresent(modificationDiff, ImmutableSet.of(NESTED_LIST_QNAME));
+    }
+
+
     @Test
     public void testWriteNonPresenceEmptyNestedContainer() throws Exception {
         final TipProducingDataTree dataTree = getDataTree();
@@ -195,14 +218,6 @@ public class ModificationDiffTest {
         assertThat(modificationDiff.getUpdates().size(), is(1));
     }
 
-    private DataTreeCandidateTip prepareModification(final TipProducingDataTree dataTree,
-                                                     final DataTreeModification dataTreeModification)
-            throws DataValidationFailedException {
-        dataTreeModification.ready();
-        dataTree.validate(dataTreeModification);
-        return dataTree.prepare(dataTreeModification);
-    }
-
     @Test
     public void testUpdateWrite() throws Exception {
         final TipProducingDataTree dataTree = getDataTree();
@@ -214,16 +229,13 @@ public class ModificationDiffTest {
         dataTreeModification.write(TOP_CONTAINER_ID, topContainerAfter);
         final DataTreeCandidateTip prepare = prepareModification(dataTree, dataTreeModification);
 
-        final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
+        final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
 
         assertThat(updates.size(), is(1));
         assertThat(updates.values().size(), is(1));
         assertUpdate(updates.values().iterator().next(), TOP_CONTAINER_ID, topContainer, topContainerAfter);
     }
 
-    private ModificationDiff getModificationDiff(final DataTreeCandidateTip prepare) throws ReactorException {
-        return ModificationDiff.recursivelyFromCandidateRoot(prepare.getRootNode(), getSchemaCtx());
-    }
 
     @Test
     public void testUpdateMerge() throws Exception {
@@ -236,7 +248,7 @@ public class ModificationDiffTest {
         dataTreeModification.merge(TOP_CONTAINER_ID, topContainerAfter);
         final DataTreeCandidateTip prepare = prepareModification(dataTree, dataTreeModification);
 
-        final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
+        final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
         assertThat(updates.size(), is(1));
         assertThat(updates.values().size(), is(1));
         assertUpdate(updates.values().iterator().next(), TOP_CONTAINER_ID, topContainer, topContainerAfter);
@@ -252,7 +264,7 @@ public class ModificationDiffTest {
         dataTreeModification.delete(TOP_CONTAINER_ID);
         final DataTreeCandidateTip prepare = prepareModification(dataTree, dataTreeModification);
 
-        final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
+        final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
         assertThat(updates.size(), is(1));
         assertThat(updates.values().size(), is(1));
         assertUpdate(updates.values().iterator().next(), TOP_CONTAINER_ID, topContainer, null);
@@ -276,7 +288,7 @@ public class ModificationDiffTest {
         dataTree.validate(dataTreeModification);
         DataTreeCandidateTip prepare = dataTree.prepare(dataTreeModification);
 
-        Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
+        Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
 
         assertThat(updates.size(), is(1));
         assertUpdate(getNormalizedNodeUpdateForAfterType(updates, MapEntryNode.class),
@@ -301,14 +313,6 @@ public class ModificationDiffTest {
         assertThat(updates.size(), is(1 /*Actual list entry*/));
     }
 //
-    private void assertUpdate(final ModificationDiff.NormalizedNodeUpdate update,
-                              final YangInstanceIdentifier idExpected,
-                              final NormalizedNode<?, ?> beforeExpected,
-                              final NormalizedNode<?, ?> afterExpected) {
-        assertThat(update.getId(), is(idExpected));
-        assertThat(update.getDataBefore(), is(beforeExpected));
-        assertThat(update.getDataAfter(), is(afterExpected));
-    }
 
     @Test
     public void testWriteTopContainerAndInnerList() throws Exception {
@@ -332,7 +336,7 @@ public class ModificationDiffTest {
 
         final DataTreeCandidateTip prepare = prepareModification(dataTree, dataTreeModification);
 
-        final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
+        final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
 
         assertThat(updates.size(), is(2));
         assertThat(updates.values().size(), is(2));
@@ -345,21 +349,7 @@ public class ModificationDiffTest {
                 listEntryId));
     }
 
-    private ModificationDiff.NormalizedNodeUpdate getNormalizedNodeUpdateForAfterType(
-            final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates,
-            final Class<? extends NormalizedNode<?, ?>> containerNodeClass) {
-        return updates.values().stream()
-                    .filter(update -> containerNodeClass.isAssignableFrom(update.getDataAfter().getClass()))
-                    .findFirst().get();
-    }
 
-    private ModificationDiff.NormalizedNodeUpdate getNormalizedNodeUpdateForBeforeType(
-            final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates,
-            final Class<? extends NormalizedNode<?, ?>> containerNodeClass) {
-        return updates.values().stream()
-                    .filter(update -> containerNodeClass.isAssignableFrom(update.getDataBefore().getClass()))
-                    .findFirst().get();
-    }
 
     @Test
     public void testWriteDeepList() throws Exception {
@@ -415,7 +405,7 @@ public class ModificationDiffTest {
         prepare = dataTree.prepare(dataTreeModification);
         dataTree.commit(prepare);
 
-        final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
+        final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
         assertThat(updates.size(), is(1));
         assertUpdate(getNormalizedNodeUpdateForAfterType(updates, MapEntryNode.class), deepListEntryId, null, deepListEntry);
     }
@@ -450,88 +440,10 @@ public class ModificationDiffTest {
         dataTree.validate(dataTreeModification);
         prepare = dataTree.prepare(dataTreeModification);
 
-        final Map<YangInstanceIdentifier, ModificationDiff.NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
+        final Map<YangInstanceIdentifier, NormalizedNodeUpdate> updates = getModificationDiff(prepare).getUpdates();
         assertThat(updates.size(), is(1));
         assertUpdate(getNormalizedNodeUpdateForBeforeType(updates, MapEntryNode.class), listItemId, mapNode.getValue().iterator().next(), null);
     }
 
-    static void addNodeToTree(final DataTree dataTree, final NormalizedNode<?, ?> node,
-                                              final YangInstanceIdentifier id)
-            throws DataValidationFailedException {
-        DataTreeSnapshot dataTreeSnapshot = dataTree.takeSnapshot();
-        DataTreeModification dataTreeModification = dataTreeSnapshot.newModification();
-        dataTreeModification.write(id, node);
-        dataTreeModification.ready();
-        dataTree.validate(dataTreeModification);
-        DataTreeCandidate prepare = dataTree.prepare(dataTreeModification);
-        dataTree.commit(prepare);
-    }
-
-    static TipProducingDataTree getDataTree() throws ReactorException {
-        final TipProducingDataTree dataTree = InMemoryDataTreeFactory.getInstance().create(TreeType.CONFIGURATION);
-        dataTree.setSchemaContext(getSchemaCtx());
-        return dataTree;
-    }
-
-    static ContainerNode getTopContainer(final String stringValue) {
-        return Builders.containerBuilder()
-                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
-                .withChild(ImmutableNodes.leafNode(STRING_LEAF_QNAME, stringValue))
-                .build();
-    }
-
-    static ContainerNode getTopContainerWithLeafList(final String... stringValue) {
-        final ListNodeBuilder<String, LeafSetEntryNode<String>> leafSetBuilder = Builders.leafSetBuilder();
-        for (final String value : stringValue) {
-            leafSetBuilder.withChild(Builders.<String>leafSetEntryBuilder()
-                    .withNodeIdentifier(new YangInstanceIdentifier.NodeWithValue<>(NESTED_LEAF_LIST_QNAME, value))
-                    .withValue(value)
-                    .build());
-        }
 
-        return Builders.containerBuilder()
-                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(TOP_CONTAINER_QNAME))
-                .withChild(Builders.containerBuilder()
-                        .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(FOR_LEAF_LIST_QNAME))
-                        .withChild(leafSetBuilder
-                                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_LEAF_LIST_QNAME))
-                                .build())
-                        .build())
-                .build();
-    }
-
-    static MapNode getNestedList(final String listItemName, final String text) {
-        return Builders.mapBuilder()
-                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(NESTED_LIST_QNAME))
-                .withChild(
-                        Builders.mapEntryBuilder()
-                                .withNodeIdentifier(
-                                        new YangInstanceIdentifier.NodeIdentifierWithPredicates(NESTED_LIST_QNAME,
-                                                NAME_LEAF_QNAME, listItemName))
-                                .withChild(ImmutableNodes.leafNode(NAME_LEAF_QNAME, listItemName))
-                                .withChild(ImmutableNodes.leafNode(TEXT_LEAF_QNAME, text))
-                                .build()
-                )
-                .build();
-    }
-
-    private MapNode getDeepList(final String listItemName) {
-        return Builders.mapBuilder()
-                .withNodeIdentifier(new YangInstanceIdentifier.NodeIdentifier(DEEP_LIST_QNAME))
-                .withChild(
-                        Builders.mapEntryBuilder()
-                                .withNodeIdentifier(
-                                        new YangInstanceIdentifier.NodeIdentifierWithPredicates(DEEP_LIST_QNAME,
-                                                NAME_LEAF_QNAME, listItemName))
-                                .withChild(ImmutableNodes.leafNode(NAME_LEAF_QNAME, listItemName))
-                                .build()
-                )
-                .build();
-    }
-
-    static SchemaContext getSchemaCtx() throws ReactorException {
-        final CrossSourceStatementReactor.BuildAction buildAction = YangInferencePipeline.RFC6020_REACTOR.newBuild();
-        buildAction.addSource(new YangStatementSourceImpl(ModificationDiffTest.class.getResourceAsStream("/test-diff.yang")));
-        return buildAction.buildEffective();
-    }
 }
\ No newline at end of file
diff --git a/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationMetadata.java b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationMetadata.java
new file mode 100644
index 000000000..27d16307a
--- /dev/null
+++ b/infra/data-impl/src/test/java/io/fd/honeycomb/data/impl/ModificationMetadata.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fd.honeycomb.data.impl;
+
+import org.opendaylight.yangtools.yang.common.QName;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+
+abstract class ModificationMetadata {
+
+    private static final String YANG_NAMESPACE = "urn:opendaylight:params:xml:ns:yang:test:diff";
+    final QName TOP_CONTAINER_QNAME = QName.create(YANG_NAMESPACE, "2015-01-05", "top-container");
+    final QName STRING_LEAF_QNAME = QName.create(TOP_CONTAINER_QNAME, "string");
+    final QName NAME_LEAF_QNAME = QName.create(TOP_CONTAINER_QNAME, "name");
+    final QName TEXT_LEAF_QNAME = QName.create(TOP_CONTAINER_QNAME, "text");
+    final QName NESTED_LIST_QNAME = QName.create(TOP_CONTAINER_QNAME, "nested-list");
+    final QName DEEP_LIST_QNAME = QName.create(TOP_CONTAINER_QNAME, "deep-list");
+    final QName EMPTY_QNAME = QName.create(TOP_CONTAINER_QNAME, "empty");
+
+    final QName FOR_LEAF_LIST_QNAME = QName.create(TOP_CONTAINER_QNAME, "for-leaf-list");
+    final QName NESTED_LEAF_LIST_QNAME = QName.create(TOP_CONTAINER_QNAME, "nested-leaf-list");
+
+    final QName WITH_CHOICE_CONTAINER_QNAME = QName.create(YANG_NAMESPACE, "2015-01-05", "with-choice");
+    final QName CHOICE_QNAME = QName.create(WITH_CHOICE_CONTAINER_QNAME, "choice");
+    final QName IN_CASE1_LEAF_QNAME = QName.create(WITH_CHOICE_CONTAINER_QNAME, "in-case1");
+
+    final QName PRESENCE_CONTAINER_QNAME = QName.create(TOP_CONTAINER_QNAME, "presence");
+
+    final QName NESTED_CONTAINER_QNAME = QName.create(TOP_CONTAINER_QNAME, "nested-container");
+    final QName NESTED_LIST_IN_CONTAINER_QNAME = QName.create(NESTED_CONTAINER_QNAME, "nested-list-in-container");
+    final QName IN_CONTAINER_NAME_LEAF_QNAME = QName.create(NESTED_LIST_IN_CONTAINER_QNAME, "name");
+    final QName NESTED_CONTAINER_VAL = QName.create(NESTED_CONTAINER_QNAME, "nested-container-val");
+    final QName NESTED_CONTAINER_LEAF_LIST = QName.create(NESTED_CONTAINER_QNAME, "nested-container-leaf-list");
+
+    final QName NESTED_CHOICE = QName.create(NESTED_CONTAINER_QNAME,"nested-choice");
+    final QName NESTED_CASE=QName.create(NESTED_CHOICE,"nested-case");
+    final QName UNDER_NESTED_CASE=QName.create(NESTED_CASE,"under-nested-case");
+
+    final QName AUG_LEAF = QName.create(NESTED_CONTAINER_QNAME,"under-aug-leaf");
+    final QName AUG_LEAFLIST = QName.create(NESTED_CONTAINER_QNAME,"under-aug-leaflist");
+    final QName AUG_CONTAINER = QName.create(NESTED_CONTAINER_QNAME,"under-aug-container");
+    final QName AUG_CONTAINER_LEAF = QName.create(NESTED_CONTAINER_QNAME,"under-aug-cont-leaf");
+    final QName AUG_LIST = QName.create(NESTED_CONTAINER_QNAME,"under-aug-list");
+    final QName AUG_LIST_KEY = QName.create(NESTED_CONTAINER_QNAME,"under-aug-list-key");
+
+    final QName NESTED_AUG_CONTAINER = QName.create(AUG_CONTAINER, "nested-under-aug-container");
+    final QName NESTED_AUG_CONTAINER_LEAF = QName.create(AUG_CONTAINER, "nested-under-aug-container-leaf");
+    final QName NESTED_AUG_LEAF = QName.create(AUG_CONTAINER, "nested-under-aug-leaf");
+    final QName NESTED_AUG_LIST = QName.create(AUG_CONTAINER, "nested-under-aug-list");
+    final QName NESTED_AUG_LIST_KEY = QName.create(AUG_CONTAINER, "nested-under-aug-list-key");
+    final QName NESTED_AUG_LEAF_LIST = QName.create(AUG_CONTAINER, "nested-under-aug-leaf-list");
+
+    final YangInstanceIdentifier TOP_CONTAINER_ID = YangInstanceIdentifier.of(TOP_CONTAINER_QNAME);
+    final YangInstanceIdentifier NESTED_LIST_ID = TOP_CONTAINER_ID.node(new YangInstanceIdentifier.NodeIdentifier(NESTED_LIST_QNAME));
+}