public async Task OnGetAsync_InvalidId()
        {
            // Arrange
            var model = new PostLogoutRedirectUrisModel(new Mock <IConfigurationDbContext>().Object);

            // Act

            var get = await model.OnGetAsync(0).ConfigureAwait(false);

            // Assert
            Assert.Null(model.Client);
            Assert.Null(model.PostLogoutRedirectUris);
            Assert.IsType <NotFoundResult>(get);
        }
        public async Task OnGetAsync()
        {
            // Arrange
            var databaseName = $"{DatabaseNamePrefix}.{nameof(OnGetAsync)}";
            var options      = new DbContextOptionsBuilder <OidcDbContext>()
                               .UseInMemoryDatabase(databaseName)
                               .Options;
            var client = new Client
            {
                Id = Random.Next(),
                PostLogoutRedirectUris = new List <ClientPostLogoutRedirectUri>
                {
                    new ClientPostLogoutRedirectUri(),
                    new ClientPostLogoutRedirectUri(),
                    new ClientPostLogoutRedirectUri()
                }
            };
            PostLogoutRedirectUrisModel model;
            IActionResult get;

            using (var context = new OidcDbContext(options))
            {
                context.Add(client);
                await context.SaveChangesAsync().ConfigureAwait(false);
            }

            // Act
            using (var context = new OidcDbContext(options))
            {
                model = new PostLogoutRedirectUrisModel(context);
                get   = await model.OnGetAsync(client.Id).ConfigureAwait(false);
            }

            // Assert
            Assert.NotNull(model.Client);
            Assert.Equal(client.Id, model.Client.Id);
            var postLogoutRedirectUris = Assert.IsAssignableFrom <IEnumerable <ClientPostLogoutRedirectUri> >(model.PostLogoutRedirectUris);

            Assert.Equal(client.PostLogoutRedirectUris.Count, postLogoutRedirectUris.Count());
            Assert.IsType <PageResult>(get);
        }
        public async Task OnGetAsync_InvalidModel()
        {
            // Arrange
            var databaseName = $"{DatabaseNamePrefix}.{nameof(OnGetAsync_InvalidModel)}";
            var options      = new DbContextOptionsBuilder <OidcDbContext>()
                               .UseInMemoryDatabase(databaseName)
                               .Options;
            PostLogoutRedirectUrisModel model;
            IActionResult get;

            // Act
            using (var context = new OidcDbContext(options))
            {
                model = new PostLogoutRedirectUrisModel(context);
                get   = await model.OnGetAsync(Random.Next()).ConfigureAwait(false);
            }

            // Assert
            Assert.Null(model.Client);
            Assert.Null(model.PostLogoutRedirectUris);
            Assert.IsType <NotFoundResult>(get);
        }