diff --git a/web/gui/src/main/webapp/tests/app/fw/widget/tooltip-spec.js b/web/gui/src/main/webapp/tests/app/fw/widget/tooltip-spec.js
new file mode 100644
index 0000000..f5a8cef
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+++ b/web/gui/src/main/webapp/tests/app/fw/widget/tooltip-spec.js
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2015 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 -- Tooltip Service - Unit Tests
+ */
+describe('factory: fw/widget/tooltip.js', function () {
+    var $log, fs, tts, d3Elem;
+
+    beforeEach(module('onosWidget', 'onosUtil'));
+
+    beforeEach(inject(function (_$log_, FnService, TooltipService) {
+        $log = _$log_;
+        fs = FnService;
+        tts = TooltipService;
+    }));
+
+    beforeEach(function () {
+        d3Elem = d3.select('body').append('div').attr('id', 'tooltip');
+    });
+
+    afterEach(function () {
+        d3.select('#tooltip').remove();
+    });
+
+    it('should define TooltipService', function () {
+        expect(tts).toBeDefined();
+    });
+
+    it('should define api functions', function () {
+        expect(fs.areFunctions(tts, [
+            'showTooltip', 'cancelTooltip'
+        ])).toBeTruthy();
+    });
+
+    it('should not accept undefined arguments', function () {
+        var btn = d3.select('body').append('div');
+        expect(tts.showTooltip()).toBeFalsy();
+        expect(tts.showTooltip(btn)).toBeFalsy();
+
+        expect(tts.cancelTooltip()).toBeFalsy();
+    });
+
+    // testing mouse events is tough
+
+    xit('should show a tooltip', function () {
+        var btn = d3.select('body').append('div').attr('id', 'foo');
+        // each is used to trigger a "mouse" event, providing this, d, and i
+        btn.each(function () {
+            tts.showTooltip(this, 'yay a tooltip');
+        });
+    });
+});