ONOS-1721 - GUI -- Websocket Service unit tests written, topo nav glyph added, other minor improvements.

Change-Id: I8199024e884d8538cd7c7d891d4fb4c81541150d
diff --git a/web/gui/src/main/webapp/app/fw/remote/websocket.js b/web/gui/src/main/webapp/app/fw/remote/websocket.js
index cb68098..0ca10e9 100644
--- a/web/gui/src/main/webapp/app/fw/remote/websocket.js
+++ b/web/gui/src/main/webapp/app/fw/remote/websocket.js
@@ -80,7 +80,7 @@
             ev = JSON.parse(msgEvent.data);
         } catch (e) {
             $log.error('Message.data is not valid JSON', msgEvent.data, e);
-            return;
+            return null;
         }
         $log.debug(' << *Rx* ', ev.event, ev.payload);
 
@@ -89,6 +89,7 @@
                 h(ev.payload);
             } catch (e) {
                 $log.error('Problem handling event:', ev, e);
+                return null;
             }
         } else {
             $log.warn('Unhandled event:', ev);
@@ -120,8 +121,7 @@
 
     function findGuiSuccessor() {
         var ncn = clusterNodes.length,
-            ip = undefined,
-            node;
+            ip, node;
 
         while (connectRetries < ncn && !ip) {
             connectRetries++;
@@ -134,7 +134,7 @@
     }
 
     function informListeners(host, url) {
-        angular.forEach(openListeners, function(lsnr) {
+        angular.forEach(openListeners, function (lsnr) {
             lsnr.cb(host, url);
         });
     }
@@ -144,6 +144,14 @@
         ws.send(JSON.stringify(ev));
     }
 
+    function noHandlersWarn(handlers, caller) {
+        if (!handlers || fs.isEmptyObject(handlers)) {
+            $log.warn('WSS.' + caller + '(): no event handlers');
+            return true;
+        }
+        return false;
+    }
+
     // ===================
     // === API Functions
 
@@ -151,6 +159,21 @@
     function resetSid() {
         sid = 0;
     }
+    function resetState() {
+        webSockOpts = undefined;
+        ws = null;
+        wsUp = false;
+        host = undefined;
+        url = undefined;
+        pendingEvents = [];
+        handlers = {};
+        sid = 0;
+        clusterNodes = [];
+        clusterIndex = -1;
+        connectRetries = 0;
+        openListeners = {};
+        nextListenerId = 1;
+    }
 
     // Currently supported opts:
     //   wsport: web socket port (other than default 8181)
@@ -181,9 +204,14 @@
     //     * an API object which has an event handler for the key
     //
     function bindHandlers(handlerMap) {
-        var m = d3.map(handlerMap),
+        var m,
             dups = [];
 
+        if (noHandlersWarn(handlerMap, 'bindHandlers')) {
+            return null;
+        }
+        m = d3.map(handlerMap);
+
         m.forEach(function (eventId, api) {
             var fn = fs.isF(api) || fs.isF(api[eventId]);
             if (!fn) {
@@ -205,7 +233,12 @@
     // Unbinds the specified message handlers.
     //   Expected that the same map will be used, but we only care about keys
     function unbindHandlers(handlerMap) {
-        var m = d3.map(handlerMap);
+        var m;
+
+        if (noHandlersWarn(handlerMap, 'unbindHandlers')) {
+            return null;
+        }
+        m = d3.map(handlerMap);
 
         m.forEach(function (eventId) {
             delete handlers[eventId];
@@ -227,8 +260,14 @@
     }
 
     function removeOpenListener(lsnr) {
-        var id = lsnr && lsnr.id,
-            o = openListeners[id];
+        var id = fs.isO(lsnr) && lsnr.id,
+            o;
+        if (!id) {
+            $log.warn('WSS.removeOpenListener(): invalid listener', lsnr);
+            return null;
+        }
+        o = openListeners[id];
+
         if (o) {
             delete openListeners[id];
         }
@@ -270,6 +309,7 @@
 
             return {
                 resetSid: resetSid,
+                resetState: resetState,
                 createWebSocket: createWebSocket,
                 bindHandlers: bindHandlers,
                 unbindHandlers: unbindHandlers,
diff --git a/web/gui/src/main/webapp/app/fw/svg/glyph.js b/web/gui/src/main/webapp/app/fw/svg/glyph.js
index 3cbef4b..3f65017 100644
--- a/web/gui/src/main/webapp/app/fw/svg/glyph.js
+++ b/web/gui/src/main/webapp/app/fw/svg/glyph.js
@@ -114,6 +114,18 @@
             "-2,4.1-2.9,7-2.9c2.9,0,5.1,0.9,6.9,2.9c5,5.4,5.6,17.1,5.4,22.6" +
             "h-25C42.3,43.1,43.1,31.5,48.1,26.1z",
 
+            topo: 'M97.2,76.3H86.6l-7.7-21.9H82c1,0,1.9-0.8,1.9-1.9V35.7c' +
+            '0-1-0.8-1.9-1.9-1.9H65.2c-1,0-1.9,0.8-1.9,1.9v2.6L33.4,26.1v-11' +
+            'c0-1-0.8-1.9-1.9-1.9H14.7c-1,0-1.9,0.8-1.9,1.9v16.8c0,1,0.8,' +
+            '1.9,1.9,1.9h16.8c1,0,1.9-0.8,1.9-1.9v-2.6l29.9,12.2v9L30.5,76.9' +
+            'c-0.3-0.3-0.8-0.5-1.3-0.5H12.4c-1,0-1.9,0.8-1.9,1.9V95c0,1,0.8,' +
+            '1.9,1.9,1.9h16.8c1,0,1.9-0.8,1.9-1.9v-6.9h47.4V95c0,1,0.8,1.9,' +
+            '1.9,1.9h16.8c1,0,1.9-0.8,1.9-1.9V78.2C99.1,77.2,98.2,76.3,97.2,' +
+            '76.3z M31.1,85.1v-4.9l32.8-26.4c0.3,0.3,0.8,0.5,1.3,0.5h10.5l' +
+            '7.7,21.9h-3c-1,0-1.9,0.8-1.9,1.9v6.9H31.1z',
+
+            // --- Navigation glyphs ------------------------------------
+
             flowTable: 'M15.9,19.1h-8v-13h8V19.1z M90.5,6.1H75.6v13h14.9V6.1z' +
             ' M71.9,6.1H56.9v13h14.9V6.1z M53.2,6.1H38.3v13h14.9V6.1z M34.5,' +
             '6.1H19.6v13h14.9V6.1z M102.2,6.1h-8v13h8V6.1z M102.2,23.6H7.9v' +
diff --git a/web/gui/src/main/webapp/app/fw/svg/icon.js b/web/gui/src/main/webapp/app/fw/svg/icon.js
index e53fe2a..737a8a8 100644
--- a/web/gui/src/main/webapp/app/fw/svg/icon.js
+++ b/web/gui/src/main/webapp/app/fw/svg/icon.js
@@ -51,7 +51,7 @@
 
         nav_apps: 'bird',
         nav_cluster: 'node',
-        nav_topo: 'unknown', // TODO: need a topology glyph
+        nav_topo: 'topo',
         nav_devs: 'switch',
         nav_links: 'ports',
         nav_hosts: 'endstation',
diff --git a/web/gui/src/main/webapp/app/view/topo/topoSelect.js b/web/gui/src/main/webapp/app/view/topo/topoSelect.js
index 521c917..097b2b0 100644
--- a/web/gui/src/main/webapp/app/view/topo/topoSelect.js
+++ b/web/gui/src/main/webapp/app/view/topo/topoSelect.js
@@ -252,7 +252,7 @@
                 cb: function () {
                     ns.navTo(flowPath, { devId: data.props['URI'] });
                 },
-                tt: 'Show flows for this device'
+                tt: 'Show flows table for this device'
             });
         }