node tests: Add tests for voting_widget.js.

This first commit starts by testing handling of
inbound data.

frontend_tests/node_tests/voting_widget.js

@@ -0,0 +1,79 @@
+zrequire('voting_widget');
+
+set_global('people', {});
+
+run_test('poll_data_holder my question', () => {
+    const is_my_poll = true;
+    const question = 'Favorite color?';
+
+    const sender_id = 99;
+    people.my_current_user_id = () => sender_id;
+
+    const data_holder = voting_widget.poll_data_holder(is_my_poll, question);
+
+    var data = data_holder.get_widget_data();
+
+    assert.deepEqual(data, {
+        comments: [],
+        question: 'Favorite color?',
+    });
+
+    const question_event = {
+        type: 'question',
+        question: 'best plan?',
+    };
+
+    data_holder.handle_event(sender_id, question_event);
+    data = data_holder.get_widget_data();
+
+    assert.deepEqual(data, {
+        comments: [],
+        question: 'best plan?',
+    });
+
+    const comment_event = {
+        type: 'new_comment',
+        idx: 1,
+        comment: 'release now',
+    };
+
+    people.safe_full_names = () => '';
+
+    data_holder.handle_event(sender_id, comment_event);
+    data = data_holder.get_widget_data();
+
+    assert.deepEqual(data, {
+        comments: [
+            {
+                comment: 'release now',
+                names: '',
+                count: 0,
+                key: '99,1',
+            },
+        ],
+        question: 'best plan?',
+    });
+
+    const vote_event = {
+        type: 'vote',
+        key: '99,1',
+        vote: 1,
+    };
+
+    data_holder.handle_event(sender_id, vote_event);
+    data = data_holder.get_widget_data();
+    data = data_holder.get_widget_data();
+
+    assert.deepEqual(data, {
+        comments: [
+            {
+                comment: 'release now',
+                names: '',
+                count: 1,
+                key: '99,1',
+            },
+        ],
+        question: 'best plan?',
+    });
+
+});

static/js/voting_widget.js

@@ -2,7 +2,7 @@ var voting_widget = (function () {
 
 var exports = {};
 
-var poll_data_holder = function (is_my_poll, question) {
+exports.poll_data_holder = function (is_my_poll, question) {
     // This object just holds data for a poll, although it
     // works closely with the widget's concept of how data
     // should be represented for rendering, plus how the
@@ -147,7 +147,7 @@ exports.activate = function (opts) {
     }
 
     var is_my_poll = people.is_my_user_id(opts.message.sender_id);
-    var poll_data = poll_data_holder(is_my_poll, question);
+    var poll_data = exports.poll_data_holder(is_my_poll, question);
 
     function render() {
         var html = templates.render('poll-widget');