Integration tests: 3 questions

Hello,

I'm trying to write a couple of tests but keep getting errors or
failures and I really think it is because I am making a mistake
writing the test, rather than the actual app (just cause it works when
I check it). Anyhow, here goes.

1. I am using EasySearch plugin. When I try to test that search works
fine, I did:
def searches_for_foo
      foo = Search.products.with("foo")
      get '/catalog/search'
      assert_response :success
      assert_template "search"
      assert_equal 1, Search.products.with("foo").size
      assert_tag :tag => "h1", :content => "Search Results for #{foo}"
      assert_tag :tag => "a", :attributes => { :href => "/catalog/#
{foo.id}"}
end

And in the catalog controller:
def search
    @search_results = Search.products.with(params[:search_string])
    unless @search_results.size > 0
      flash.now[:notice] = "No products found matching your criteria"
    end
  end

Error says:
Expected response to be a <:success>, but was <500>
<"You have a nil object when you didn't expect it!\nThe error occurred
while evaluating nil.match">

I understand that it does not see the phrase I am searching for.
Because I get the same error is I go to /catalog/search manually. But
I don't know how to:
a) fix the test
b) fix the controller so I will not see this exception page

2. I have a model for pages with a column whether it is a news pages
or not (boolean)
My test is:
def views_news
      get "/news"
      assert_response :success
      assert_template "index"
     @news_months.each do |month, items|
        assert_tag :tag => "h3", :content => month
        for item in items
          assert_tag :tag => "li", :content => item.title
        end
      end
      check_news_links
end

I changed my search method to be apart of index:
def index
    if params[:search]
      @products = Search.products.with(params[:search])
    else
      @products = Product.find_valid
    end
  end

And changed my test accordingly and it passes.

Can anyone please have a look at my views_news test??

Thanks,
Elle