diff --git a/runtime/src/test/java/org/onosproject/yang/runtime/impl/serializerhelper/AddToDataNodeList1SubModuleTest.java b/runtime/src/test/java/org/onosproject/yang/runtime/impl/serializerhelper/AddToDataNodeList1SubModuleTest.java
new file mode 100644
index 0000000..a452078
--- /dev/null
+++ b/runtime/src/test/java/org/onosproject/yang/runtime/impl/serializerhelper/AddToDataNodeList1SubModuleTest.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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 org.onosproject.yang.runtime.impl.serializerhelper;
+
+import org.junit.Test;
+import org.onosproject.yang.model.DataNode;
+import org.onosproject.yang.model.InnerNode;
+import org.onosproject.yang.model.KeyLeaf;
+import org.onosproject.yang.model.ListKey;
+import org.onosproject.yang.model.NodeKey;
+import org.onosproject.yang.model.ResourceId;
+import org.onosproject.yang.runtime.HelperContext;
+import org.onosproject.yang.runtime.impl.TestYangSerializerContext;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.Map;
+
+import static org.onosproject.yang.model.DataNode.Type.MULTI_INSTANCE_LEAF_VALUE_NODE;
+import static org.onosproject.yang.model.DataNode.Type.MULTI_INSTANCE_NODE;
+import static org.onosproject.yang.model.DataNode.Type.SINGLE_INSTANCE_LEAF_VALUE_NODE;
+import static org.onosproject.yang.model.DataNode.Type.SINGLE_INSTANCE_NODE;
+import static org.onosproject.yang.runtime.SerializerHelper.addDataNode;
+import static org.onosproject.yang.runtime.SerializerHelper.exitDataNode;
+import static org.onosproject.yang.runtime.SerializerHelper.getResourceId;
+import static org.onosproject.yang.runtime.SerializerHelper.initializeDataNode;
+import static org.onosproject.yang.runtime.impl.TestUtils.LNS;
+import static org.onosproject.yang.runtime.impl.TestUtils.L_NAME;
+import static org.onosproject.yang.runtime.impl.TestUtils.validateDataNode;
+import static org.onosproject.yang.runtime.impl.TestUtils.validateLeafDataNode;
+import static org.onosproject.yang.runtime.impl.TestUtils.validateResourceId;
+import static org.onosproject.yang.runtime.impl.TestUtils.walkINTree;
+
+/**
+ * Tests the serializer helper methods for submodule handling.
+ */
+public class AddToDataNodeList1SubModuleTest {
+
+    TestYangSerializerContext context = new TestYangSerializerContext();
+
+    /*
+     * Reference for data node info.
+     */
+    HelperContext info;
+
+    /*
+     * Reference for data node builder.
+     */
+    DataNode.Builder dBlr;
+
+    /*
+     * Reference for resource id.
+     */
+    ResourceId id;
+
+    /*
+     * Reference for the value.
+     */
+    String value;
+
+    /*
+     * Reference for string array to used for resource id testing.
+     */
+    String[] nA;
+    String[] nsA;
+    String[] valA;
+
+    private static final String[] EXPECTED = {
+            "Entry Node is /.",
+            "Entry Node is l4.",
+            "Entry Node is k1.",
+            "Exit Node is k1.",
+            "Entry Node is c1.",
+            "Entry Node is leaf_c1.",
+            "Exit Node is leaf_c1.",
+            "Exit Node is c1.",
+            "Exit Node is l4.",
+            "Entry Node is leaf4.",
+            "Exit Node is leaf4.",
+            "Entry Node is leaf4.",
+            "Exit Node is leaf4.",
+            "Entry Node is leaf4.",
+            "Exit Node is leaf4.",
+            "Entry Node is leaf4.",
+            "Exit Node is leaf4.",
+            "Exit Node is /."
+    };
+
+    /**
+     * Test add to data node builder.
+     */
+    @Test
+    public void addToDataListTest() throws IOException {
+        ResourceId id;
+        dBlr = initializeDataNode(context);
+        dBlr = addDataNode(dBlr, "l4", L_NAME, value, null);
+        value = "1";
+        dBlr = addDataNode(dBlr, "k1", null, value, null);
+        dBlr = exitDataNode(dBlr);
+        dBlr = addDataNode(dBlr, "c1", null, null, null);
+        value = "0";
+        dBlr = addDataNode(dBlr, "leaf_c1", null, value, null);
+
+        info = (HelperContext) dBlr.appInfo();
+        id = getResourceId(dBlr);
+        dBlr = exitDataNode(dBlr);
+
+        ResourceId id1 = getResourceId(dBlr);
+        dBlr = exitDataNode(dBlr);
+
+        info = (HelperContext) dBlr.appInfo();
+        ResourceId id2 = getResourceId(dBlr);
+
+        dBlr = exitDataNode(dBlr);
+
+        // Checking leaf list
+        value = "1";
+        dBlr = addDataNode(dBlr, "leaf4", L_NAME, value, null);
+        dBlr = exitDataNode(dBlr);
+        value = "2";
+        dBlr = addDataNode(dBlr, "leaf4", L_NAME, value, null);
+        dBlr = exitDataNode(dBlr);
+        value = "3";
+        dBlr = addDataNode(dBlr, "leaf4", L_NAME, value, null);
+        dBlr = exitDataNode(dBlr);
+        value = null;
+        dBlr = addDataNode(dBlr, "leaf4", L_NAME, value, null);
+        ResourceId id3 = getResourceId(dBlr);
+        dBlr = exitDataNode(dBlr);
+
+        //Tree validation
+        nA = new String[]{"/", "l4", "k1", "c1", "leaf_c1"};
+        nsA = new String[]{null, LNS, LNS, LNS, LNS};
+        valA = new String[]{"1", "2", "3", "0"};
+        validateResourceId(nA, nsA, valA, id);
+
+        nA = new String[]{"/", "l4", "k1", "c1"};
+        nsA = new String[]{null, LNS, LNS, LNS};
+        valA = new String[]{"1", "2", "3"};
+        validateResourceId(nA, nsA, valA, id1);
+
+        nA = new String[]{"/", "l4", "k1"};
+        nsA = new String[]{null, LNS, LNS};
+        valA = new String[]{"1", "2", "3"};
+        validateResourceId(nA, nsA, valA, id2);
+
+        nA = new String[]{"/", "leaf4"};
+        nsA = new String[]{null, LNS};
+        valA = new String[]{null};
+        validateResourceId(nA, nsA, valA, id3);
+
+        // Validating the data node.
+        DataNode node = dBlr.build();
+        validateDataNode(node, "/", null, SINGLE_INSTANCE_NODE, true, null);
+
+        Map<NodeKey, DataNode> childMap = ((InnerNode) node).childNodes();
+        Iterator<Map.Entry<NodeKey, DataNode>> it = childMap.entrySet().iterator();
+        Map.Entry<NodeKey, DataNode> n = it.next();
+        validateDataNode(n.getValue(), "l4", LNS, MULTI_INSTANCE_NODE,
+                         true, null);
+
+        Iterator<KeyLeaf> keyIt = ((ListKey) n.getKey()).keyLeafs().iterator();
+
+        validateLeafDataNode(keyIt.next(), "k1", LNS, "1");
+
+        Iterator<Map.Entry<NodeKey, DataNode>> it1;
+        it1 = ((InnerNode) n.getValue()).childNodes().entrySet().iterator();
+        validateDataNode(it1.next().getValue(), "k1", LNS,
+                         SINGLE_INSTANCE_LEAF_VALUE_NODE, false, "1");
+        DataNode n1 = it1.next().getValue();
+        validateDataNode(n1, "c1", LNS,
+                         SINGLE_INSTANCE_NODE, true, null);
+
+        Iterator<Map.Entry<NodeKey, DataNode>> it2;
+        it2 = ((InnerNode) n1).childNodes().entrySet().iterator();
+        validateDataNode(it2.next().getValue(), "leaf_c1", LNS,
+                         SINGLE_INSTANCE_LEAF_VALUE_NODE, false, "0");
+        validateDataNode(it.next().getValue(), "leaf4", LNS,
+                         MULTI_INSTANCE_LEAF_VALUE_NODE, false, "1");
+        validateDataNode(it.next().getValue(), "leaf4", LNS,
+                         MULTI_INSTANCE_LEAF_VALUE_NODE, false, "2");
+        validateDataNode(it.next().getValue(), "leaf4", LNS,
+                         MULTI_INSTANCE_LEAF_VALUE_NODE, false, "3");
+        validateDataNode(it.next().getValue(), "leaf4", LNS,
+                         MULTI_INSTANCE_LEAF_VALUE_NODE, false, null);
+        walkINTree(dBlr.build(), EXPECTED);
+    }
+}
diff --git a/runtime/src/test/java/org/onosproject/yang/runtime/impl/serializerhelper/AddToDataNodeListSubModuleTest.java b/runtime/src/test/java/org/onosproject/yang/runtime/impl/serializerhelper/AddToDataNodeListSubModuleTest.java
new file mode 100644
index 0000000..fcd249d
--- /dev/null
+++ b/runtime/src/test/java/org/onosproject/yang/runtime/impl/serializerhelper/AddToDataNodeListSubModuleTest.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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 org.onosproject.yang.runtime.impl.serializerhelper;
+
+import org.junit.Test;
+import org.onosproject.yang.model.DataNode;
+import org.onosproject.yang.model.InnerNode;
+import org.onosproject.yang.model.KeyLeaf;
+import org.onosproject.yang.model.ListKey;
+import org.onosproject.yang.model.NodeKey;
+import org.onosproject.yang.model.ResourceId;
+import org.onosproject.yang.runtime.HelperContext;
+import org.onosproject.yang.runtime.impl.TestYangSerializerContext;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.Map;
+
+import static org.onosproject.yang.model.DataNode.Type.MULTI_INSTANCE_LEAF_VALUE_NODE;
+import static org.onosproject.yang.model.DataNode.Type.MULTI_INSTANCE_NODE;
+import static org.onosproject.yang.model.DataNode.Type.SINGLE_INSTANCE_LEAF_VALUE_NODE;
+import static org.onosproject.yang.model.DataNode.Type.SINGLE_INSTANCE_NODE;
+import static org.onosproject.yang.runtime.SerializerHelper.addDataNode;
+import static org.onosproject.yang.runtime.SerializerHelper.exitDataNode;
+import static org.onosproject.yang.runtime.SerializerHelper.getResourceId;
+import static org.onosproject.yang.runtime.SerializerHelper.initializeDataNode;
+import static org.onosproject.yang.runtime.impl.TestUtils.LNS;
+import static org.onosproject.yang.runtime.impl.TestUtils.L_NAME;
+import static org.onosproject.yang.runtime.impl.TestUtils.validateDataNode;
+import static org.onosproject.yang.runtime.impl.TestUtils.validateLeafDataNode;
+import static org.onosproject.yang.runtime.impl.TestUtils.validateResourceId;
+import static org.onosproject.yang.runtime.impl.TestUtils.walkINTree;
+
+/**
+ * Tests the serializer helper methods for submodule handling.
+ */
+public class AddToDataNodeListSubModuleTest {
+
+    TestYangSerializerContext context = new TestYangSerializerContext();
+
+    /*
+     * Reference for data node info.
+     */
+    HelperContext info;
+
+    /*
+     * Reference for data node builder.
+     */
+    DataNode.Builder dBlr;
+
+    /*
+     * Reference for resource id.
+     */
+    ResourceId id;
+
+    /*
+     * Reference for the value.
+     */
+    String value;
+
+    /*
+     * Reference for string array to used for resource id testing.
+     */
+    String[] nA;
+    String[] nsA;
+    String[] valA;
+
+    private static final String[] EXPECTED = {
+            "Entry Node is /.",
+            "Entry Node is l2.",
+            "Entry Node is k1.",
+            "Exit Node is k1.",
+            "Entry Node is c1.",
+            "Entry Node is leaf_c1.",
+            "Exit Node is leaf_c1.",
+            "Exit Node is c1.",
+            "Exit Node is l2.",
+            "Entry Node is leaf2.",
+            "Exit Node is leaf2.",
+            "Entry Node is leaf2.",
+            "Exit Node is leaf2.",
+            "Entry Node is leaf2.",
+            "Exit Node is leaf2.",
+            "Entry Node is leaf2.",
+            "Exit Node is leaf2.",
+            "Exit Node is /."
+    };
+
+    /**
+     * Test add to data node builder.
+     */
+    @Test
+    public void addToDataListTest() throws IOException {
+        ResourceId id;
+        dBlr = initializeDataNode(context);
+        dBlr = addDataNode(dBlr, "l2", L_NAME, value, null);
+        value = "1";
+        dBlr = addDataNode(dBlr, "k1", null, value, null);
+        dBlr = exitDataNode(dBlr);
+        dBlr = addDataNode(dBlr, "c1", null, null, null);
+        value = "0";
+        dBlr = addDataNode(dBlr, "leaf_c1", null, value, null);
+
+        info = (HelperContext) dBlr.appInfo();
+        id = getResourceId(dBlr);
+        dBlr = exitDataNode(dBlr);
+
+        ResourceId id1 = getResourceId(dBlr);
+        dBlr = exitDataNode(dBlr);
+
+        info = (HelperContext) dBlr.appInfo();
+        ResourceId id2 = getResourceId(dBlr);
+
+        dBlr = exitDataNode(dBlr);
+
+        // Checking leaf list
+        value = "1";
+        dBlr = addDataNode(dBlr, "leaf2", L_NAME, value, null);
+        dBlr = exitDataNode(dBlr);
+        value = "2";
+        dBlr = addDataNode(dBlr, "leaf2", L_NAME, value, null);
+        dBlr = exitDataNode(dBlr);
+        value = "3";
+        dBlr = addDataNode(dBlr, "leaf2", L_NAME, value, null);
+        dBlr = exitDataNode(dBlr);
+        value = null;
+        dBlr = addDataNode(dBlr, "leaf2", L_NAME, value, null);
+        ResourceId id3 = getResourceId(dBlr);
+        dBlr = exitDataNode(dBlr);
+
+        //Tree validation
+        nA = new String[]{"/", "l2", "k1", "c1", "leaf_c1"};
+        nsA = new String[]{null, LNS, LNS, LNS, LNS};
+        valA = new String[]{"1", "2", "3", "0"};
+        validateResourceId(nA, nsA, valA, id);
+
+        nA = new String[]{"/", "l2", "k1", "c1"};
+        nsA = new String[]{null, LNS, LNS, LNS};
+        valA = new String[]{"1", "2", "3"};
+        validateResourceId(nA, nsA, valA, id1);
+
+        nA = new String[]{"/", "l2", "k1"};
+        nsA = new String[]{null, LNS, LNS};
+        valA = new String[]{"1", "2", "3"};
+        validateResourceId(nA, nsA, valA, id2);
+
+        nA = new String[]{"/", "leaf2"};
+        nsA = new String[]{null, LNS};
+        valA = new String[]{null};
+        validateResourceId(nA, nsA, valA, id3);
+
+        // Validating the data node.
+        DataNode node = dBlr.build();
+        validateDataNode(node, "/", null, SINGLE_INSTANCE_NODE, true, null);
+
+        Map<NodeKey, DataNode> childMap = ((InnerNode) node).childNodes();
+        Iterator<Map.Entry<NodeKey, DataNode>> it = childMap.entrySet().iterator();
+        Map.Entry<NodeKey, DataNode> n = it.next();
+        validateDataNode(n.getValue(), "l2", LNS, MULTI_INSTANCE_NODE,
+                         true, null);
+
+        Iterator<KeyLeaf> keyIt = ((ListKey) n.getKey()).keyLeafs().iterator();
+
+        validateLeafDataNode(keyIt.next(), "k1", LNS, "1");
+
+        Iterator<Map.Entry<NodeKey, DataNode>> it1;
+        it1 = ((InnerNode) n.getValue()).childNodes().entrySet().iterator();
+        validateDataNode(it1.next().getValue(), "k1", LNS,
+                         SINGLE_INSTANCE_LEAF_VALUE_NODE, false, "1");
+        DataNode n1 = it1.next().getValue();
+        validateDataNode(n1, "c1", LNS,
+                         SINGLE_INSTANCE_NODE, true, null);
+
+        Iterator<Map.Entry<NodeKey, DataNode>> it2;
+        it2 = ((InnerNode) n1).childNodes().entrySet().iterator();
+        validateDataNode(it2.next().getValue(), "leaf_c1", LNS,
+                         SINGLE_INSTANCE_LEAF_VALUE_NODE, false, "0");
+        validateDataNode(it.next().getValue(), "leaf2", LNS,
+                         MULTI_INSTANCE_LEAF_VALUE_NODE, false, "1");
+        validateDataNode(it.next().getValue(), "leaf2", LNS,
+                         MULTI_INSTANCE_LEAF_VALUE_NODE, false, "2");
+        validateDataNode(it.next().getValue(), "leaf2", LNS,
+                         MULTI_INSTANCE_LEAF_VALUE_NODE, false, "3");
+        validateDataNode(it.next().getValue(), "leaf2", LNS,
+                         MULTI_INSTANCE_LEAF_VALUE_NODE, false, null);
+        walkINTree(dBlr.build(), EXPECTED);
+    }
+}
diff --git a/runtime/src/test/resources/schemaProviderTestYangFiles/list.yang b/runtime/src/test/resources/schemaProviderTestYangFiles/list.yang
index 2ff07dc..c0a1b69 100644
--- a/runtime/src/test/resources/schemaProviderTestYangFiles/list.yang
+++ b/runtime/src/test/resources/schemaProviderTestYangFiles/list.yang
@@ -5,6 +5,9 @@
     namespace "yrt:list";
 
     prefix "l";
+    include list2;
+    include list3;
+    include list4;
 
     organization "ON-LAB";
 
diff --git a/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist.yang b/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist.yang
new file mode 100644
index 0000000..5f31db7
--- /dev/null
+++ b/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist.yang
@@ -0,0 +1,32 @@
+submodule list2 {
+
+    yang-version 1;
+    belongs-to "list"{
+        prefix l1;
+    }
+    include list3;
+    organization "ON-LAB";
+
+    description "This module defines for list.";
+
+    revision "2016-06-24" {
+        description "Initial revision.";
+    }
+
+    list l2 {
+        key "k1";
+            leaf k1 {
+               type string;
+            }
+
+            container c1 {
+                leaf leaf_c1 {
+                  type string;
+                }
+            }
+    }
+
+    leaf-list leaf2 {
+        type string;
+    }
+}
\ No newline at end of file
diff --git a/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist1.yang b/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist1.yang
new file mode 100644
index 0000000..2a9a99d
--- /dev/null
+++ b/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist1.yang
@@ -0,0 +1,18 @@
+submodule list3 {
+
+    yang-version 1;
+    belongs-to "list"{
+        prefix l;
+    }
+    include list4;
+    organization "ON-LAB";
+
+    description "This module defines for list.";
+
+    revision "2016-06-24" {
+        description "Initial revision.";
+    }
+    leaf-list leaf3 {
+        type string;
+    }
+}
\ No newline at end of file
diff --git a/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist2.yang b/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist2.yang
new file mode 100644
index 0000000..12674f2
--- /dev/null
+++ b/runtime/src/test/resources/schemaProviderTestYangFiles/suBlist2.yang
@@ -0,0 +1,30 @@
+submodule list4 {
+
+    yang-version 1;
+    belongs-to "list"{
+        prefix l;
+    }
+    organization "ON-LAB";
+
+    description "This module defines for list.";
+
+    revision "2016-06-24" {
+        description "Initial revision.";
+    }
+
+    list l4 {
+        key "k1";
+            leaf k1 {
+               type string;
+            }
+
+            container c1 {
+                leaf leaf_c1 {
+                  type string;
+                }
+            }
+    }
+    leaf-list leaf4 {
+        type string;
+    }
+}
\ No newline at end of file