Rspec2 partial view gives nil:NilClass. Why?

Testing RSpec
1

Hello,

I am trying to get going with development of view components with
Rspec2 and Rails3.
However, I make the following observation, and I don’t understand what
is going on, and how to fix this.

In my spec I define:

describe “main/index.html.erb” do
it “displays a photo url in products partial” do
assign(:designs, [stub_model(Design, :name => “test”, :photo =>
“photo_url”)])

  render
  rendered.should contain("photo_url")
end

end

When I run:

rspec spec/view/main_spec.rb

I get this error:

1) main/index.html.erb displays a photo url in products partial
   Failure/Error: render
   ActionView::Template::Error:
     undefined method `photo' for nil:NilClass
   # ./app/views/main/_design.html.erb:3:in

_app_views_main__design_html_erb__2937334847274155273_2170841960__1566661024965846011' # ./app/views/main/index.html.erb:25:in_app_views_main_index_html_erb__837234277009287876_2170861440__898201527838028543’
# ./spec/views/main_spec.rb:7:in `block (2 levels) in <top
(required)>’

However, if I only ‘access’ a local photo object in my partial
everything passes. This is:

in _design.html.erb:

  <%= design %>  ---> PASS
  <%= design.photo %>  ---> FAIL

In my view I call my partial as follows:

main.html.erb

 <%= render "design", :locals => { :designs => @designs } %>

What am I missing.
Thank you for your help!

2

The problem is probably due to assignment of the photo attachment.
I got a unit test working with:

test “the partial” do
design = Design.new :photo => File.new(Rails.root + “test/
fixtures/images/rails.png”)
p design.photo(:medium)
render :partial => “main/design”, :locals => { :design =>
design }, :layout => false
assert_select “div.product-img a.product-link img[src^=’/designs/
photos//medium_rails.png’]”
end

3

On Jan 21, 2011, at 4:43 AM, poseid wrote:

describe “main/index.html.erb” do

   # ./app/views/main/index.html.erb:25:in
  <%= design.photo %>  ---> FAIL

In my view I call my partial as follows:

main.html.erb

 <%= render "design", :locals => { :designs => @designs } %>

What am I missing.
Thank you for your help!

photos//medium_rails.png’]"
end

And the same does not work in a view spec?