BDD on rails 过程

• Start with a scenario. Make sure you have a clear understanding
of the scenario and how it is expected to work, including how the
UI should support a user interacting with the app 。

 

从一个场景开始。确保你对这个场景有一个清晰的了解，知道它预期将怎样工作，

包括UI将为这个应用提供一个怎样的用户界面。

• Execute the scenario with Cucumber. This reveals which steps are
pending. Most, if not all of the steps will be pending at first.

 

用Cucumber运行这个场景。它会显示那些步骤处于带解决的状态。

• Write a step definition for the first step. Execute the scenario with
Cucumber and watch it fail.

 

 

为第一步写步骤定义。使用Cucumber运行这个场景，看它的错误信息。

 

• Drive out the view implementation using the red/green/refactor
cycle with RSpec. You’ll discover assigned instance variables, controllers,
controller actions, and models that the view will need in
order to do its job.

 

使用RSpec红、绿、重构循环驱动视图的实现。

通过这项工作你可以找到视图需要的实例变量、控制器、控制器动作、和模型。

• Drive out the controller with RSpec, ensuring that the instance
variables are properly assigned. With the controller in place you’ll
know what models it needs to do its job.

 

使用RSpec驱动控制器，确保实例变量正确赋值。控制器到位后，你就会找到完成它需要哪些模型。

• Drive out those objects with RSpec, ensuring that they provide the
methods needed by the view and the controller. This typically leads
to generating the required migrations for fields in the database.

 

使用Rspec来驱动那些对象，确保他们提供了视图和控制器需要的方法。

这样就可以找到需要数据迁移的那些字段了。

• Once you have implemented all of the objects and methods that
you have discovered are needed, execute the scenario with Cucumber
again to make sure the step is satisfied.

 

一旦你完成了你需要的所有对象和方法，再次使用Cucumber运行那个场景，确保这个步骤的完成。