[Fact]
public void CreatePostShouldReturnViewWithSameModelWhenInvalidModelState()
    => MyController<ArticlesController>                            // Specify the controller under test.
        .Instance()                                                // Create it from the globally registered services.
        .Calling(c => c.Create(With.Default<ArticleFormModel>()))  // Specify the action under test and provide empty model.
        .ShouldHave()
        .InvalidModelState()                                       // Assert invalid model state.
        .AndAlso()                                                 // Provide additional assertions.
        .ShouldReturn()
        .View(With.Default<ArticleFormModel>());                   // Validate the view result and the same empty model.