diff --git a/web/gui2-fw-lib/projects/gui2-fw-lib/src/lib/svg/zoom.service.spec.ts b/web/gui2-fw-lib/projects/gui2-fw-lib/src/lib/svg/zoom.service.spec.ts
new file mode 100644
index 0000000..fe25860
--- /dev/null
+++ b/web/gui2-fw-lib/projects/gui2-fw-lib/src/lib/svg/zoom.service.spec.ts
@@ -0,0 +1,193 @@
+/*
+ * Copyright 2018-present Open Networking Foundation
+ *
+ * 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.
+ */
+import { TestBed, inject } from '@angular/core/testing';
+import { ActivatedRoute, Params } from '@angular/router';
+import { of } from 'rxjs';
+import * as d3 from 'd3';
+
+import { LogService } from '../log.service';
+import { FnService } from '../util/fn.service';
+
+import { ZoomService, CZ, D3S, ZoomOpts, Zoomer } from './zoom.service';
+
+class MockActivatedRoute extends ActivatedRoute {
+    constructor(params: Params) {
+        super();
+        this.queryParams = of(params);
+    }
+}
+
+
+/**
+ * ONOS GUI -- SVG -- Zoom Service - Unit Tests
+ */
+describe('ZoomService', () => {
+    let zs: ZoomService;
+    let ar: ActivatedRoute;
+    let fs: FnService;
+    let mockWindow: Window;
+    let logServiceSpy: jasmine.SpyObj<LogService>;
+
+    const svg = d3.select('body').append('svg').attr('id', 'mySvg');
+    const zoomLayer = svg.append('g').attr('id', 'myZoomlayer');
+
+    beforeEach(() => {
+        const logSpy = jasmine.createSpyObj('LogService', ['debug', 'warn', 'error']);
+        ar = new MockActivatedRoute({'debug': 'TestService'});
+        mockWindow = <any>{
+            innerWidth: 400,
+            innerHeight: 200,
+            navigator: {
+                userAgent: 'defaultUA'
+            }
+        };
+        fs = new FnService(ar, logSpy, mockWindow);
+
+        TestBed.configureTestingModule({
+            providers: [ ZoomService,
+                { provide: FnService, useValue: fs },
+                { provide: LogService, useValue: logSpy },
+                { provide: ActivatedRoute, useValue: ar },
+                { provide: 'Window', useFactory: (() => mockWindow ) }
+            ]
+        });
+
+        zs = TestBed.get(ZoomService);
+        logServiceSpy = TestBed.get(LogService);
+    });
+
+    it('should be created', () => {
+        expect(zs).toBeTruthy();
+    });
+
+    it('should define ZoomService', function () {
+        expect(zs).toBeDefined();
+    });
+
+    it('should define api functions', function () {
+        expect(fs.areFunctions(zs, [
+            'createZoomer',
+            'zoomed',
+            'adjustZoomLayer'
+        ])).toBeTruthy();
+    });
+
+    function verifyZoomerApi() {
+        expect(fs.areFunctions(zs.zoomer, [
+            'panZoom', 'reset', 'translate', 'scale', 'scaleExtent'
+        ])).toBeTruthy();
+    }
+
+    it('should fail gracefully with no option object', function () {
+        expect(() => zs.createZoomer(<ZoomOpts>{}))
+            .toThrow(new Error(CZ + 'No "svg" (svg tag)' + D3S));
+        expect(logServiceSpy.error)
+            .toHaveBeenCalledWith(CZ + 'No "svg" (svg tag)' + D3S);
+    });
+
+    it('should complain if we miss required options', function () {
+        expect(() => zs.createZoomer(<ZoomOpts>{svg: svg}))
+            .toThrow(new Error(CZ + 'No "zoomLayer" (g tag)' + D3S));
+        expect(logServiceSpy.error).toHaveBeenCalledWith(CZ + 'No "zoomLayer" (g tag)' + D3S);
+    });
+
+    it('should work with minimal parameters', function () {
+        const zoomer = zs.createZoomer(<ZoomOpts>{
+            svg: svg,
+            zoomLayer: zoomLayer
+        });
+        expect(logServiceSpy.error).not.toHaveBeenCalled();
+        verifyZoomerApi();
+    });
+
+    it('should start at scale 1 and translate 0,0', function () {
+        const zoomer = zs.createZoomer(<ZoomOpts>{
+            svg: svg,
+            zoomLayer: zoomLayer
+        });
+        verifyZoomerApi();
+        expect(zoomer.translate()).toEqual([0, 0]);
+        expect(zoomer.scale()).toEqual(1);
+    });
+
+    it('should allow programmatic pan/zoom', function () {
+        const zoomer: Zoomer = zs.createZoomer(<ZoomOpts>{
+            svg: svg,
+            zoomLayer: zoomLayer
+        });
+        verifyZoomerApi();
+
+        expect(zoomer.translate()).toEqual([0, 0]);
+        expect(zoomer.scale()).toEqual(1);
+
+        zoomer.panZoom([20, 30], 1);
+        expect(zoomer.translate()).toEqual([20, 30]);
+        expect(zoomer.scale()).toEqual(1);
+
+        zoomer.reset();
+        expect(zoomer.translate()).toEqual([0, 0]);
+        expect(zoomer.scale()).toEqual(1);
+
+
+    });
+
+    it('should provide default scale extent', function () {
+        const zoomer = zs.createZoomer(<ZoomOpts>{
+            svg: svg,
+            zoomLayer: zoomLayer
+        });
+        expect(zoomer.scaleExtent()).toEqual([0.05, 50]);
+    });
+
+    it('should allow us to override the minimum zoom', function () {
+        const zoomer = zs.createZoomer(<ZoomOpts>{
+            svg: svg,
+            zoomLayer: zoomLayer,
+            zoomMin: 1.23
+        });
+        expect(zoomer.scaleExtent()).toEqual([1.23, 50]);
+    });
+
+    it('should allow us to override the maximum zoom', function () {
+        const zoomer = zs.createZoomer(<ZoomOpts>{
+            svg: svg,
+            zoomLayer: zoomLayer,
+            zoomMax: 13
+        });
+        expect(zoomer.scaleExtent()).toEqual([0.05, 13]);
+    });
+
+    // TODO: test zoomed() where we fake out the d3.event.sourceEvent etc...
+    //  need to check default enabled (true) and custom enabled predicate
+    //  need to check that the callback is invoked also
+
+    it('should invoke the callback on programmatic pan/zoom', function () {
+        const foo = { cb() { return; } };
+        spyOn(foo, 'cb');
+
+        const zoomer = zs.createZoomer(<ZoomOpts>{
+            svg: svg,
+            zoomMin: 0.25,
+            zoomMax: 10,
+            zoomLayer: zoomLayer,
+            zoomEnabled: (ev) => true,
+            zoomCallback: foo.cb,
+        });
+
+        zoomer.panZoom([0, 0], 2);
+        expect(foo.cb).toHaveBeenCalled();
+    });
+});