public async Task GetNotificationsAsync_OAuth2Null_ThrowsArgumentNullException()
        {
            var client   = new ImgurClient("123", "1234");
            var endpoint = new NotificationEndpoint(client);

            var exception =
                await
                Record.ExceptionAsync(
                    async() => await endpoint.GetNotificationsAsync().ConfigureAwait(false))
                .ConfigureAwait(false);

            Assert.NotNull(exception);
            Assert.IsType <ArgumentNullException>(exception);
        }
        public async Task GetNotificationsAsync_NotNull()
        {
            var mockUrl      = "https://api.imgur.com/3/notification?new=false";
            var mockResponse = new HttpResponseMessage(HttpStatusCode.OK)
            {
                Content = new StringContent(MockNotificationEndpointResponses.GetNotifications)
            };

            var client   = new ImgurClient("123", "1234", MockOAuth2Token);
            var endpoint = new NotificationEndpoint(client,
                                                    new HttpClient(new MockHttpMessageHandler(mockUrl, mockResponse)));
            var notifications = await endpoint.GetNotificationsAsync(false).ConfigureAwait(false);

            Assert.NotNull(notifications);
            Assert.NotNull(notifications.Messages);
            Assert.NotNull(notifications.Replies);
        }