GUI -- Implemented loadIcon() in the IconService.

Change-Id: Ib19e9ee01d0c015a2ba6f0431bc0d84adf530efd

@@ -72,7 +72,7 @@
 
 <div>
     <table class="summary-list">
-        <tr> <th>One</th> <th>Two</th> <th>Three</th> </tr>
+        <tr> <th></th> <th>Two</th> <th>Three</th> </tr>
         <tr>
             <td>
                 <div icon icon-id="deviceOnline">

@@ -22,14 +22,53 @@
 (function () {
     'use strict';
 
-    var $log;
+    var $log, fs;
+
+    var viewBoxDim = 50,
+        viewBox = '0 0 ' + viewBoxDim + ' ' + viewBoxDim;
+
+    // maps icon id to the glyph id it uses.
+    // note: icon id maps to a CSS class for styling that icon
+    var glyphMapping = {
+            deviceOnline: 'checkMark',
+            deviceOffline: 'xMark'
+        };
 
     angular.module('onosSvg')
-        .factory('IconService', ['$log', function (_$log_) {
+        .factory('IconService', ['$log', 'FnService', function (_$log_, _fs_) {
             $log = _$log_;
+            fs = _fs_;
+
+            // div is a D3 selection of the <DIV> element into which icon should load
+            // iconCls is the CSS class used to identify the icon
+            // size is dimension of icon in pixels. Defaults to 20.
+            function loadIcon(div, iconCls, size) {
+                var dim = size || 20,
+                    gid = glyphMapping[iconCls] || 'unknown';
+
+                var svg = div.append('svg').attr({
+                        width: dim,
+                        height: dim,
+                        viewBox: viewBox
+                    });
+                var g = svg.append('g').attr({
+                    'class': 'icon ' + iconCls
+                });
+                g.append('rect').attr({
+                    width: viewBoxDim,
+                    height: viewBoxDim,
+                    rx: 4
+                });
+                g.append('use').attr({
+                    width: viewBoxDim,
+                    height: viewBoxDim,
+                    'class': 'glyph',
+                    'xlink:href': '#' + gid
+                });
+            }
 
             return {
-                tbd: function () {}
+                loadIcon: loadIcon
             };
         }]);
 

@@ -20,17 +20,70 @@
  @author Simon Hunt
  */
 describe('factory: fw/svg/icon.js', function() {
-    var is;
+    var is, d3Elem;
+
+    var viewBox = '0 0 50 50',
+        glyphSize = '50',
+        iconSize = '20';
+
 
     beforeEach(module('onosSvg'));
 
     beforeEach(inject(function (IconService) {
         is = IconService;
+        d3Elem = d3.select('body').append('div').attr('id', 'myDiv');
     }));
 
+    afterEach(function () {
+        d3.select('#myDiv').remove();
+    });
+
     it('should define IconService', function () {
         expect(is).toBeDefined();
     });
 
-    // TODO: unit tests for icon functions
+    function checkElemSize(elem, dim) {
+        expect(elem.attr('width')).toEqual(dim);
+        expect(elem.attr('height')).toEqual(dim);
+    }
+
+    function verifyIconStructure(iconClass, useHref, iSize, vBox, gSize) {
+        var isz = iSize || iconSize,
+            vbx = vBox || viewBox,
+            gsz = gSize || glyphSize;
+
+        var svg = d3Elem.selectAll('svg');
+        expect(svg.size()).toBe(1);
+        checkElemSize(svg, isz);
+        expect(svg.attr('viewBox')).toEqual(vbx);
+
+        var g = svg.selectAll('g');
+        expect(g.size()).toBe(1);
+        expect(g.classed('icon')).toBeTruthy();
+        expect(g.classed(iconClass)).toBeTruthy();
+
+        var rect = g.select('rect');
+        expect(rect.size()).toBe(1);
+        checkElemSize(rect, gsz);
+        expect(rect.attr('rx')).toEqual('4');
+
+        var use = g.select('use');
+        expect(use.classed('glyph')).toBeTruthy();
+        expect(use.attr('xlink:href')).toEqual(useHref);
+        checkElemSize(use, gsz);
+    }
+
+
+    it('should load an icon into a div', function () {
+        expect(d3Elem.html()).toEqual('');
+        is.loadIcon(d3Elem, 'deviceOnline');
+        verifyIconStructure('deviceOnline', '#checkMark');
+    });
+
+    it('should allow us to specify the icon size', function () {
+        expect(d3Elem.html()).toEqual('');
+        is.loadIcon(d3Elem, 'deviceOffline', 32);
+        verifyIconStructure('deviceOffline', '#xMark', '32');
+    });
+
 });