[Persistence] Show user, modification time

Show user name and modification time in dialog when revision-checking
detects modifications. WTD-1033.

platform/persistence/queue/test/PersistenceFailureControllerSpec.js

@@ -0,0 +1,27 @@
+/*global define,Promise,describe,it,expect,beforeEach,waitsFor,jasmine*/
+
+
+define(
+    ["../src/PersistenceFailureController"],
+    function (PersistenceFailureController) {
+        "use strict";
+
+        describe("The persistence failure controller", function () {
+            var controller;
+
+            beforeEach(function () {
+                controller = new PersistenceFailureController();
+            });
+
+            it("converts timestamps to human-readable dates", function () {
+                expect(controller.formatTimestamp(402514331000))
+                    .toEqual("1982-10-03 17:32:11Z");
+            });
+
+            it("provides default user names", function () {
+                expect(controller.formatUsername(undefined))
+                    .toEqual(jasmine.any(String));
+            });
+        });
+    }
+);