On 12 Jun 2009, at 08:34, Lee wrote:

In my controller's create method, I have:

@sub_context = @context.create_sub_context(params[:context][:name])

If I do not specify params in the "post :create" call in my controller
spec then I get the following error for each example:

You have a nil object when you didn't expect it!
You might have expected an instance of ActiveRecord::Base.
The error occurred while evaluating nil.[]

So I see that it is trying to access :name when :context is nil which
can be avoided if I ensure each post :create includes a params for
[:context][:name] e.g.

post :create, :context => {"name" => "Seniors"}

I am wondering if there is a way to avoid having to specify params in
each and every example by adding some code to a before[:each] block?
For example, the params are redundant in some examples e.g.

   it "should save the context" do
     @context.should_receive(:save)
     post :create, :context => {"name" => "Seniors"}
   end

Thanks.

There are several ways of doing this. The pattern I tend to us is to create a method that does the post, and contains default parameters which you can override if you want to.

describe "when the context has a name"
  def do_post(params = {})
    post :create, (:context => {"name" => "Seniors"}).merge(params)
  end

  it "should save the context" do
    @context.should_receive(:save)
    do_post
  end
end

Make sense?


Matt Wynne
http://beta.songkick.com
http://blog.mattwynne.net



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