diff --git a/apps/yms/ut/src/test/java/org/onosproject/yms/app/ydt/YdtInteger64Test.java b/apps/yms/ut/src/test/java/org/onosproject/yms/app/ydt/YdtInteger64Test.java
new file mode 100644
index 0000000..da2b86c
--- /dev/null
+++ b/apps/yms/ut/src/test/java/org/onosproject/yms/app/ydt/YdtInteger64Test.java
@@ -0,0 +1,422 @@
+/*
+ * Copyright 2016-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.yms.app.ydt;
+
+import org.junit.Test;
+import org.onosproject.yms.app.ydt.exceptions.YdtException;
+
+import static org.onosproject.yms.app.ydt.YdtTestConstants.J;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.K;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MAXIWR;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MAXUINT64;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MAXUIWR;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MIDIWR;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MIDUIWR;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MINIWR;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MINUIWR;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MINVALUE;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.MRV;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.RUI;
+import static org.onosproject.yms.app.ydt.YdtTestConstants.TYPE;
+import static org.onosproject.yms.app.ydt.YdtTestUtils.integer64Ydt;
+import static org.onosproject.yms.app.ydt.YdtTestUtils.validateLeafContents;
+import static org.onosproject.yms.app.ydt.YdtTestUtils.validateNodeContents;
+import static org.onosproject.yms.ydt.YdtContextOperationType.MERGE;
+
+public class YdtInteger64Test {
+
+    /*
+
+    Positive scenario
+
+    input at boundry for integer
+        i. min value
+        ii. max value
+
+    input at boundry for uinteger
+        i. min value
+        ii. max value
+
+    input with in range
+        if range is 10 to 100 for integer
+            i.1. input 11
+            i.2. min value 10
+            i.3. max value 100
+
+        if range is 10 to 100 for uinteger
+            i.1. input 11
+            i.2. min value 10
+            i.3. max value 100
+
+    input with multi interval range
+        if range is 10..40 | 50..100 for integer
+            i.1. input 11
+            i.2. input 10
+            i.3. input 40
+            i.4. input 50
+            i.5. input 55
+            i.6. input 100
+
+        if range is 10..40 | 50..100 for uinteger
+            i.1. input 11
+            i.2. input 10
+            i.3. input 40
+            i.4. input 50
+            i.5. input 55
+            i.6. input 100
+
+        if range is "min .. 2 | 10 | 20..max" for integer
+            i.1. input -9223372036854775808
+            i.2. input 1
+            i.3. input 2
+            i.4. input 10
+            i.5. input 20
+            i.6. input 100
+            i.7. input 9223372036854775807
+
+         if range is "min .. 2 | 10 | 20..max" for uInteger
+            i.1. input 0
+            i.2. input 1
+            i.3. input 2
+            i.4. input 10
+            i.5. input 20
+            i.6. input 100
+            i.7. input 18446744073709551615
+    */
+
+    /**
+     * Creates and validates integer64 ydt covering different positive scenario.
+     */
+    @Test
+    public void positiveTest() throws YdtException {
+        YangRequestWorkBench ydtBuilder = integer64Ydt();
+        validateTree(ydtBuilder);
+    }
+
+    /**
+     * Validates the given built ydt.
+     */
+    private void validateTree(YangRequestWorkBench ydtBuilder) {
+
+        // assign root node to ydtNode for validating purpose.
+        YdtNode ydtNode = (YdtNode) ydtBuilder.getRootNode();
+        // Logical root node does not have operation type
+        validateNodeContents(ydtNode, TYPE, null);
+
+        ydtNode = ydtNode.getFirstChild();
+        validateNodeContents(ydtNode, "integer64", MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "negInt", K);
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, "posInt", J);
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, "minUInt", MINVALUE);
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, "maxUInt", MAXUINT64);
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, MIDIWR, "11");
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, MINIWR, "10");
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, MAXIWR, "100");
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, MIDUIWR, "11");
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, MINUIWR, "10");
+        ydtNode = ydtNode.getNextSibling();
+        validateLeafContents(ydtNode, MAXUIWR, "100");
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "integer", "11");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "integer", "10");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "integer", "40");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "integer", "50");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "integer", "55");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "integer", "100");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "UnInteger", "11");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "UnInteger", "10");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "UnInteger", "40");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "UnInteger", "50");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "UnInteger", "55");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "UnInteger", "100");
+
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "revInteger", K);
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "revInteger", "1");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "revInteger", "2");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "revInteger", "10");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+
+        validate1Tree(ydtNode);
+    }
+
+    /**
+     * Validates the given built ydt.
+     */
+    private void validate1Tree(YdtNode ydtNode) {
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "revInteger", "20");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "revInteger", "100");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, "revInteger", J);
+
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, RUI, MINVALUE);
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, RUI, "1");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, RUI, "2");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, RUI, "10");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, RUI, "20");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, RUI, "100");
+        ydtNode = ydtNode.getParent();
+        ydtNode = ydtNode.getNextSibling();
+        validateNodeContents(ydtNode, MRV, MERGE);
+        ydtNode = ydtNode.getFirstChild();
+        validateLeafContents(ydtNode, RUI, MAXUINT64);
+    }
+
+    //TODO negative scenario will be handled later
+    /*
+        Negative scenario
+
+        wrong type input
+            i. input string instead of integer
+            ii. input string instead of uinteger
+
+        input out of range
+            i. input for int 8 range -9223372036854775808 to 9223372036854775807
+            i.1. input -9223372036854775809
+            i.2. input 9223372036854775808
+
+            ii. input for uint 8 range 0 to 18446744073709551615
+            ii.1. input -9223372036854775809
+            ii.2. input 18446744073709551616
+
+        input out of range parameter
+            if range is 10 to 100 for int
+                i.1. input 9
+                i.2. input 101
+
+            if range is 10 to 100 for uInt
+                i.1. input 9
+                i.2. input 101
+
+        input with multi interval range
+        if range is 10..40 | 50..100 for integer
+            i.1. input 9
+            i.2. input 41
+            i.3. input 49
+            i.4. input 101
+
+        if range is 10..40 | 50..100 for uinteger
+            i.1. input 9
+            i.2. input 41
+            i.3. input 49
+            i.4. input 101
+
+        input with multi interval range
+        if range is min ..  | 10 | 20..max for integer
+            i.1. input -9223372036854775809
+            i.2. input 4
+            i.3. input 9
+            i.4. input 11
+            i.5. input 19
+            i.6. input 9223372036854775808
+
+        if range is min .. 3 | 10 | 20..max for uinteger
+            i.1. input -9223372036854775809
+            i.2. input 4
+            i.3. input 9
+            i.4. input 11
+            i.5. input 19
+            i.6. input 18446744073709551616
+
+    */
+
+    /**
+     * Tests all the minimum and maximum value's negative scenario's for
+     * signed integer64 data type.
+     */
+//    @Test
+//    public void negative1Test() throws YdtException {
+//        validateErrMsg("posInt", INT64NS, "integer", SMALLINT64, null);
+//        validateErrMsg("posInt", INT64NS, "127.0", SMALLINT64, null);
+//        validateErrMsg("negInt", INT64NS, L, SMALLINT64, null);
+//        validateErrMsg("posInt", INT64NS, I, SMALLINT64, null);
+//        validateErrMsg(MINIWR, INT64NS, "9", CAPSINT64, null);
+//        validateErrMsg(MAXIWR, INT64NS, "101", CAPSINT64, null);
+//    }
+//
+//    /**
+//     * Tests all the minimum and maximum value's negative scenario's for
+//     * unsigned integer64 data type.
+//     */
+//    @Test
+//    public void negative2Test() throws YdtException {
+//        validateErrMsg("maxUInt", INT64NS, "integer", SMALLUINT64, null);
+//        validateErrMsg("maxUInt", INT64NS, "127.0", SMALLUINT64, null);
+//        validateErrMsg("minUInt", INT64NS, L, MINVALUE, null);
+//        validateErrMsg("maxUInt", INT64NS, M, MAXUINT64, null);
+//        validateErrMsg(MINUIWR, INT64NS, "9", CAPSUINT64, null);
+//        validateErrMsg(MAXUIWR, INT64NS, "101", CAPSUINT64, null);
+//    }
+//
+//    /**
+//     * Tests all possible negative scenario's for signed integer64 data type
+//     * with range "10..40 | 50..100".
+//     */
+//    @Test
+//    public void negative3Test() throws YdtException {
+//        validateErrMsg("integer", INT64NS, "9", CAPSINT64, MRV);
+//        validateErrMsg("integer", INT64NS, "41", CAPSINT64, MRV);
+//        validateErrMsg("integer", INT64NS, "49", CAPSINT64, MRV);
+//        validateErrMsg("integer", INT64NS, "101", CAPSINT64, MRV);
+//    }
+//
+//    /**
+//     * Tests all possible negative scenario's for unsigned integer64 data type
+//     * with range "10..40 | 50..100".
+//     */
+//    @Test
+//    public void negative4Test() throws YdtException {
+//        validateErrMsg("UnInteger", INT64NS, "9", CAPSUINT64, MRV);
+//        validateErrMsg("UnInteger", INT64NS, "41", CAPSUINT64, MRV);
+//        validateErrMsg("UnInteger", INT64NS, "49", CAPSUINT64, MRV);
+//        validateErrMsg("UnInteger", INT64NS, "101", CAPSUINT64, MRV);
+//    }
+//
+//    /**
+//     * Tests all possible negative scenario's for signed integer64 data type
+//     * with range "min .. 2 | 10 | 20..max".
+//     */
+//    @Test
+//    public void negative5Test() throws YdtException {
+//        // multi range validation
+//        validateErrMsg("revInteger", INT64NS, L, SMALLINT64, MRV);
+//        validateErrMsg("revInteger", INT64NS, "11", CAPSINT64, MRV);
+//        validateErrMsg("revInteger", INT64NS, "4", CAPSINT64, MRV);
+//        validateErrMsg("revInteger", INT64NS, "9", CAPSINT64, MRV);
+//        validateErrMsg("revInteger", INT64NS, "19", CAPSINT64, MRV);
+//        validateErrMsg("revInteger", INT64NS, I, SMALLINT64, MRV);
+//    }
+//
+//    /**
+//     * Tests all possible negative scenario's for unsigned integer64 data type
+//     * with range "min .. 2 | 10 | 20..max".
+//     */
+//    @Test
+//    public void negative6Test() throws YdtException {
+//        // multi range validation
+//        validateErrMsg(RUI, INT64NS, L, MINVALUE, MRV);
+//        validateErrMsg(RUI, INT64NS, "4", CAPSUINT64, MRV);
+//        validateErrMsg(RUI, INT64NS, "9", CAPSUINT64, MRV);
+//        validateErrMsg(RUI, INT64NS, "11", CAPSUINT64, MRV);
+//        validateErrMsg(RUI, INT64NS, "19", CAPSUINT64, MRV);
+//        validateErrMsg(RUI, INT64NS, M, MAXUINT64, MRV);
+//    }
+}