asp.net-mvc – Thunderdome MVC-为什么在MVC中使用one-model-in

The “Thunderdome Principle” – All
Controller methods take in one
ViewModel object (or zero objects in
some cases) and return a single
ViewModel object (one object enters,
one object leaves). The Controller
classes will NEVER be directly exposed
to anything related to HttpContext.
Nothing makes me cry like seeing
people trying to write tests that mock
or stub that new IHttpContextWrapper
interface. Likewise,Controller
methods do not return ViewResult
objects and are generally decoupled
from all MVC infrastructure. We
adopted this strategy very early on as
a way to make Controller testing
simpler mechanically. It’s definitely
achieved that goal,but it’s also made
the Controller code very streamlined
and easy to read. We’ll explain how
this works at KaizenConf.

他们的’一个ViewModel(或零)’方法有什么优势？