issue-2023: introduce unit tests for inbox view

There were no unit tests for the file at all so I added some simple ones
mostly focused on my changes.

test/index.html

@@ -624,6 +624,7 @@
   <script type="text/javascript" src="views/attachment_view_test.js"></script>
   <script type="text/javascript" src="views/timestamp_view_test.js"></script>
   <script type="text/javascript" src="views/list_view_test.js"></script>
+  <script type="text/javascript" src="views/inbox_view_test.js"></script>
   <script type="text/javascript" src="views/conversation_search_view_test.js"></script>
   <script type="text/javascript" src="views/network_status_view_test.js"></script>
   <script type="text/javascript" src="views/last_seen_indicator_view_test.js"></script>

test/views/inbox_view_test.js

@@ -0,0 +1,41 @@
+describe('InboxView', function() {
+    var inboxView = new Whisper.InboxView({
+        model: {},
+        window: window,
+        initialLoadComplete: function() {}
+    }).render();
+
+    var conversation = new Whisper.Conversation({ id: '1234', type: 'private'});
+
+    describe('the conversation stack', function() {
+        it('should be rendered', function() {
+            assert.ok(inboxView.$('.conversation-stack').length === 1);
+        });
+
+        describe('opening a conversation', function() {
+            var triggeredOpenedCount = 0;
+
+            before(function() {
+                conversation.on('opened', function() {
+                    triggeredOpenedCount++;
+                });
+
+                inboxView.conversation_stack.open(conversation);
+            });
+
+            it('should trigger an opened event', function() {
+                assert.ok(triggeredOpenedCount === 1);
+            });
+
+            describe('and then opening it again immediately', function() {
+                before(function() {
+                    inboxView.conversation_stack.open(conversation);
+                });
+
+                it('should trigger the opened event again', function() {
+                    assert.ok(triggeredOpenedCount === 2);
+                });
+            });
+        });
+    });
+});