public Task TestGet()
        {
            var storageMock = new Mock<IStorageController>(MockBehavior.Strict);
              var storageDictionary = new Mock<IStorageDictionary<string, object>>();

              storageMock.Setup(s => s.LoadAsync()).Returns(Task.FromResult(storageDictionary.Object));

              var controller = new InstallationIdController(storageMock.Object);
              return controller.GetAsync().ContinueWith(installationIdTask => {
            Assert.False(installationIdTask.IsFaulted);

            object verified = null;
            storageDictionary.Verify(s => s.TryGetValue("InstallationId", out verified));
            storageDictionary.Verify(s => s.AddAsync("InstallationId", It.IsAny<object>()));

            return controller.GetAsync().ContinueWith(newInstallationIdTask => {
              Assert.False(newInstallationIdTask.IsFaulted);

              // Ensure nothing more has happened with our dictionary.
              storageDictionary.VerifyAll();

              Assert.AreEqual(installationIdTask.Result, newInstallationIdTask.Result);

              return controller.ClearAsync();
            }).Unwrap().ContinueWith(clearTask => {
              Assert.False(clearTask.IsFaulted);

              storageDictionary.Verify(storage => storage.RemoveAsync("InstallationId"));

              return controller.GetAsync();
            }).Unwrap().ContinueWith(newInstallationIdTask => {
              Assert.False(newInstallationIdTask.IsFaulted);

              Assert.AreNotEqual(installationIdTask.Result, newInstallationIdTask.Result);

              storageDictionary.Verify(s => s.TryGetValue("InstallationId", out verified));
              storageDictionary.Verify(s => s.AddAsync("InstallationId", It.IsAny<object>()));
            });
              }).Unwrap();
        }
        public Task TestSet()
        {
            var storageMock = new Mock<IStorageController>(MockBehavior.Strict);
              var storageDictionary = new Mock<IStorageDictionary<string, object>>();

              storageMock.Setup(s => s.LoadAsync()).Returns(Task.FromResult(storageDictionary.Object));

              var controller = new InstallationIdController(storageMock.Object);

              return controller.GetAsync().ContinueWith(installationIdTask => {
            Assert.False(installationIdTask.IsFaulted);

            object verified = null;
            storageDictionary.Verify(s => s.TryGetValue("InstallationId", out verified));
            storageDictionary.Verify(s => s.AddAsync("InstallationId", It.IsAny<object>()));

            var installationId = installationIdTask.Result;
            var installationId2 = Guid.NewGuid();

            return controller.SetAsync(installationId2).ContinueWith(setTask => {
              Assert.False(setTask.IsFaulted);

              storageDictionary.Verify(s => s.AddAsync("InstallationId", installationId2.ToString()));

              return controller.GetAsync();
            }).Unwrap().ContinueWith(installationId3Task => {
              Assert.False(installationId3Task.IsFaulted);

              storageDictionary.Verify(s => s.TryGetValue("InstallationId", out verified));

              var installationId3 = installationId3Task.Result;
              Assert.AreEqual(installationId2, installationId3);

              return controller.SetAsync(installationId);
            }).Unwrap().ContinueWith(setTask => {
              Assert.False(setTask.IsFaulted);

              storageDictionary.Verify(s => s.AddAsync("InstallationId", installationId.ToString()));

              return controller.ClearAsync();
            }).Unwrap().ContinueWith(clearTask => {
              Assert.False(clearTask.IsFaulted);

              storageDictionary.Verify(s => s.RemoveAsync("InstallationId"));

              return controller.SetAsync(installationId2);
            }).Unwrap().ContinueWith(setTask => {
              Assert.False(setTask.IsFaulted);

              storageDictionary.Verify(s => s.AddAsync("InstallationId", installationId2.ToString()));
            });
              }).Unwrap();
        }