public async Task RandomShouldReturnViewModelWithCorrecArticle() { // ARRANGE const int requestedEntityIndex = 3; const int requestedEntityId = requestedEntityIndex + 1; var configuration = new ConfigurationBuilder() .AddInMemoryCollection(new KeyValuePair <string, string>[] { new KeyValuePair <string, string>("Articles:PageSize", "5"), }) .Build(); var articleController = new ArticlesController(new FakeArticleService(), null, configuration) .WithClaimPrincipal("TEST_USERNAME"); var fakeRandomValueProvider = new FakeRandomValueProvider { NextValue = requestedEntityIndex }; // ACT var actionResult = Assert.IsType <ViewResult>(await articleController.Random(fakeRandomValueProvider)); var model = Assert.IsType <ArticleDetailsServiceModel>(actionResult.Model); // ASSERT Assert.Equal(requestedEntityId, model.Id); }