ES6: Convert all test files over

test/javascripts/models/topic-tracking-state-test.js.es6

@@ -0,0 +1,21 @@
+module("Discourse.TopicTrackingState");
+
+test("sync", function () {
+
+  var state = Discourse.TopicTrackingState.create();
+  // fake track it
+  state.states["t111"] = {last_read_post_number: null};
+
+  state.updateSeen(111, 7);
+  var list = {topics: [{
+    highest_post_number: null,
+    id: 111,
+    unread: 10,
+    new_posts: 10
+    }]};
+
+  state.sync(list, "new");
+
+  equal(list.topics.length, 0, "expect new topic to be removed as it was seen");
+
+});