Hi, I am trying to write and test a helper that accepts a block. Right now it goes something like this: module ContactHelper # Wraps a field with div.error if it has an error. def wrap_error_field errors, &block field = capture &block if errors.empty? concat field else concat content_tag(:div, field, :class => 'error') end end # field_error_helper This is my first time writing a helper, so please tell me if I'm wrong. Then, I tried to test it, but couldn't figure it out, since it seems the method won't actually return anything due to the use of concat. The best I could figure out for now was to use eval_erb. require File.expand_path(File.dirname(__FILE__) + '/../spec_helper') describe ContactHelper do describe "field_error_helper" do context "when there is an error" do it "should wrap the block in div.error" do assigns[:errors] = [ 'Error' ] output = eval_erb <<-ERB <% wrap_error_field @errors do %> <p>Block</p> <% end %> ERB assert_xhtml output do div.error do p 'Block' end end end # it should wrap the block in div.error end # when there is an error end # describe field_error_helper end end Is that the best/only method? I'm not sure how much I really like it. Further, when I run the tests, it always outputs "Block" before the test is executed, and I can't figure out why, and that's slightly annoying. Thanks, Brandon
on 2009-04-08 14:57
on 2009-04-09 22:20
Hi, Well, I googled some more, and everything I could find used eval_erb. So is this the best method for testing helpers with blocks? And then why is that block displaying when I run the test? Thanks, Brandon
on 2009-04-09 22:55
> assert_xhtml output do > div.error do > p 'Block' > end > end Nokogiri has some "easter eggs" in its ambitious HTML::Builder system. One of them is only HTML tags not already recognized as methods can get turned into HTML tags. The usual .method_missing() abuse. The fix is: assert_xhtml output do div.error do p! 'Block' end end (Also .be_html_with might work by now... 0.4.9?) Aaron P. is pondering this issue even now in his subconscious, but I only ought to feed him one feature request at a time and a couple others are ahead in the queue, so my ! trick has to work for the near future...
on 2009-04-10 02:04
Hi, Oh, I should have thought of that. Thanks a lot. I'm growing used to the assert_xhtml syntax, lol, so I've just been using that. Thank you though for fixing the be_html_with syntax. Brandon