Notification related actions.
Inheritance: EndpointBase, INotificationEndpoint
        public async Task GetNotificationAsync_WithIdNull_ThrowsArgumentNullException()
        {
            var client = new ImgurClient("123", "1234", MockOAuth2Token);
            var endpoint = new NotificationEndpoint(client);

            var exception =
                await
                    Record.ExceptionAsync(
                        async () => await endpoint.GetNotificationAsync(null).ConfigureAwait(false))
                        .ConfigureAwait(false);
            Assert.NotNull(exception);
            Assert.IsType<ArgumentNullException>(exception);
        }
        public async Task GetNotificationAsync_NotNull()
        {
            var mockUrl = "https://api.imgur.com/3/notification/12345";
            var mockResponse = new HttpResponseMessage(HttpStatusCode.OK)
            {
                Content = new StringContent(MockNotificationEndpointResponses.GetNotification)
            };

            var client = new ImgurClient("123", "1234", MockOAuth2Token);
            var endpoint = new NotificationEndpoint(client,
                new HttpClient(new MockHttpMessageHandler(mockUrl, mockResponse)));
            var notification = await endpoint.GetNotificationAsync("12345").ConfigureAwait(false);

            Assert.NotNull(notification);
        }
        public async Task MarkNotificationViewedAsync_WithOAuth2Null_ThrowsArgumentNullException()
        {
            var client = new ImgurClient("123", "1234");
            var endpoint = new NotificationEndpoint(client);

            var exception =
                await
                    Record.ExceptionAsync(
                        async () => await endpoint.MarkNotificationViewedAsync("123").ConfigureAwait(false))
                        .ConfigureAwait(false);
            Assert.NotNull(exception);
            Assert.IsType<ArgumentNullException>(exception);
        }
        public async Task MarkNotificationViewedAsync_True()
        {
            var mockUrl = "https://api.imgur.com/3/notification";
            var mockResponse = new HttpResponseMessage(HttpStatusCode.OK)
            {
                Content = new StringContent(MockNotificationEndpointResponses.MarkNotificationViewed)
            };

            var client = new ImgurClient("123", "1234", MockOAuth2Token);
            var endpoint = new NotificationEndpoint(client,
                new HttpClient(new MockHttpMessageHandler(mockUrl, mockResponse)));
            var marked =
                await endpoint.MarkNotificationsViewedAsync(new List<string> {"12345", "4445"}).ConfigureAwait(false);

            Assert.True(marked);
        }