TDD - User Interface

Question 1

How complex should be the UI definition code (HTML/C#)?

Answer 1

As simple and stupid as possible. Once this is harder to test.

Question 2

Where to develop as much user interface logic as possible?

Answer 2

In the page model. So that you can unit test it.

Question 3

How to segregate UI definition from the UI logic in legacy projects (e.g: WPF/Win UI)?

Answer 3

Using Model View ViewModel (MVVM).

Question 4

What’s a data annotation?

Answer 4

It’s a property that can be added to properties in order to extend their capabilities. E.g: [Required] and [StringLength(50)]