diff --git a/web/gui/src/main/webapp/tests/app/fw/widget/chartBuilder-spec.js b/web/gui/src/main/webapp/tests/app/fw/widget/chartBuilder-spec.js
new file mode 100644
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--- /dev/null
+++ b/web/gui/src/main/webapp/tests/app/fw/widget/chartBuilder-spec.js
@@ -0,0 +1,91 @@
+/*
+ * 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.
+ */
+
+/*
+ ONOS GUI -- Widget -- Chart Builder Service - Unit Tests
+ */
+
+describe('factory: fw/widget/chartBuilder.js', function () {
+    var $log, $rootScope, fs, cbs, is;
+
+    var mockObj;
+        mockWss = {
+            bindHandlers: function () {},
+            sendEvent: function () {},
+            unbindHandlers: function () {}
+        };
+
+    beforeEach(module('onosWidget', 'onosUtil', 'onosRemote', 'onosSvg'));
+
+    beforeEach(function () {
+        module(function ($provide) {
+            $provide.value('WebSocketService', mockWss);
+        });
+    });
+
+    beforeEach(inject(function (_$log_, _$rootScope_,
+                                FnService, ChartBuilderService, IconService) {
+        $log = _$log_;
+        $rootScope = _$rootScope_;
+        fs = FnService;
+        cbs = ChartBuilderService;
+        is = IconService;
+    }));
+
+    beforeEach(function () {
+        mockObj = {
+            scope: $rootScope.$new(),
+            tag: 'foo'
+        };
+    });
+
+    afterEach(function () {
+        mockObj = {};
+    });
+
+    it('should define ChartBuilderService', function () {
+        expect(cbs).toBeDefined();
+    });
+
+    it('should define api functions', function () {
+        expect(fs.areFunctions(cbs, [
+            'buildChart'
+        ])).toBeTruthy();
+    });
+
+    it('should verify requestCb', function () {
+        spyOn(mockWss, 'sendEvent');
+        expect(mockObj.scope.requestCallback).not.toBeDefined();
+        cbs.buildChart(mockObj);
+        expect(mockObj.scope.requestCallback).toBeDefined();
+        expect(mockWss.sendEvent).toHaveBeenCalled();
+    });
+
+    it('should set chartData', function () {
+        expect(mockObj.scope.chartData).not.toBeDefined();
+        cbs.buildChart(mockObj);
+        expect(fs.isA(mockObj.scope.chartData)).toBeTruthy();
+        expect(mockObj.scope.chartData.length).toBe(0);
+    });
+
+    it('should unbind handlers on destroyed scope', function () {
+        spyOn(mockWss, 'unbindHandlers');
+        cbs.buildChart(mockObj);
+        expect(mockWss.unbindHandlers).not.toHaveBeenCalled();
+        mockObj.scope.$destroy();
+        expect(mockWss.unbindHandlers).toHaveBeenCalled();
+    });
+}
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