Update group and unsubscribe for parity with server-side integration INT-566

lib/index.js

@@ -94,7 +94,10 @@ Vero.prototype.track = function(track) {
   var regex = /[uU]nsubscribe/;
 
   if (track.event().match(regex)) {
-    push('unsubscribe', { id: track.properties().id });
+    var id = this.analytics.user().id();
+    if (id) {
+      push('unsubscribe', id);
+    }
   } else {
     push('track', track.event(), track.properties(), { source: 'segment' });
   }
@@ -119,3 +122,19 @@ Vero.prototype.alias = function(alias) {
     push('reidentify', to);
   }
 };
+
+Vero.prototype.group = function(group) {
+  var user = this.analytics.user();
+  var traits = {
+    group: group.traits()
+  };
+  if (user.id()) {
+    traits.id = user.id();
+  }
+  if (user.traits().email) {
+    traits.email = user.traits().email;
+  }
+  if (traits.id || traits.email) {
+    push('user', traits);
+  }
+};

test/index.test.js

@@ -139,8 +139,10 @@ describe('Vero', function() {
       });
 
       it('should send an unsubscribe event in the correct format', function() {
-        analytics.track('unsubscribe', { id: 'id' });
-        analytics.called(window._veroq.push, ['unsubscribe', { id: 'id' }]);
+        analytics.identify('id');
+        window._veroq.push.reset();
+        analytics.track('unsubscribe');
+        analytics.called(window._veroq.push, ['unsubscribe', 'id']);
       });
     });
 
@@ -159,5 +161,25 @@ describe('Vero', function() {
         analytics.called(window._veroq.push, ['reidentify', 'new', 'old']);
       });
     });
+
+    describe('#group', function() {
+      beforeEach(function() {
+        analytics.stub(window._veroq, 'push');
+      });
+
+      it('should send an id and group traits', function() {
+        analytics.identify('id');
+        window._veroq.push.reset();
+        analytics.group('group', { number: 4 });
+        analytics.called(window._veroq.push, ['user', { id: 'id', group: { id: 'group', number: 4 } }]);
+      });
+
+      it('should send an email and group traits', function() {
+        analytics.identify({ email: 'e@ma.il' });
+        window._veroq.push.reset();
+        analytics.group('group', { number: 4 });
+        analytics.called(window._veroq.push, ['user', { email: 'e@ma.il', group: { id: 'group', number: 4 } }]);
+      });
+    });
   });
 });