Ok I'm making progress :) Now I can actually post an error from within
HAML!
So I added this to my spec, which cleared up most of the previous
errors...
describe ApplicationHelper do
include ActionView::Helpers
include ActionView::Helpers::CaptureHelper
include Haml::Helpers
...
It now finds HAML and calls HAML#open it also can find capture.
Now I get this error, presumably because the HAML buffer has not been
initialized. So is there a call I shol dmake to initialize HAML in the
spec test?
You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.[]
/home/morris/work/snowdogsrus/rails/snowdogsrus/config/../vendor/
plugins/haml/lib/haml/helpers.rb:276:in `buffer'
/home/morris/work/snowdogsrus/rails/snowdogsrus/config/../vendor/
plugins/haml/lib/haml/helpers.rb:259:in `open'
/home/morris/work/snowdogsrus/rails/snowdogsrus/config/../app/
helpers/application_helper.rb:15:in `display_flash'
On Jul 13, 12:21 pm, wolfmanjm <[EMAIL PROTECTED]> wrote:
> That is correct, and well within the paradigm that RSpec sets out, so
> I agree that would be the best solution to test this helper.
>
> However the original question at the top of the page was how to test
> the actual HTML generated by Haml#open. presuming you don't trust Haml
> to do the right thing ;) it would be nice to know how to test a helper
> end to end through Haml to the generated HTML.
>
> I would certainly like to know how to do it.
>
> Another way to test end to end (and may go against RSpec methodology,
> but does work well) is to simply test a view that uses the helper, and
> test the generated HTML, which I have done and it works well. But a
> more focused test on a specific helper would also be a nice tool in my
> toolbox.
>
> On Jul 13, 12:12 pm, Sean Cribbs <[EMAIL PROTECTED]> wrote:
>
> > You might be able to mock that out. It looks like your spec bleeds too
> > much into Haml and ActionView's domain. Here's what I might do:
>
> > it "should display flash" do
> > [:notice, :warning, :error].each do |name|
> > message = "flash #{name.to_s} message"
> > flash.should_receive(:[]).with(name).and_return(message)
> > MyHelper.should_receive(:open).with(:div, message, :id => name.to_s)
> > # change to match your helper name
> > display_flash
> > end
> > end
>
> > Now, you may want to do something with the MyHelper.should_receive line
> > and have it return something, which you could verify after the call.
>
> > Sean Cribbs
>
> > wolfmanjm wrote:
> > > Well they used to :) Now I am trying to use the capture {...} syntax
> > > as Nathan suggests, that would work fine, if it could find the capture
> > > method, and the haml libraries for the open ... method.
>
> > > it "should display flash" do
> > > for name in [:notice, :warning, :error]
> > > flash[name]= "flash #{name.to_s} message"
> > > capture{
> > > display_flash
> > > }.should == "<div class=\"#{name.to_s}\">#{flash[name]}</div>"
> > > flash[name]= nil
> > > end
> > > end
>
> > > Gives me and error...
> > > undefined method `capture'
>
> > > On Jul 13, 7:49 am, Hampton <[EMAIL PROTECTED]> wrote:
>
> > >> Yeah, the Helpers being tested definitely aren't loading Haml in.
>
> > >> Are they just expecting vanilla Strings back from the calls?
>
> > >> -hampton.
>
> > >> On 7/13/07, wolfmanjm <[EMAIL PROTECTED]> wrote:
>
> > >>> I get...
>
> > >>> undefined method `capture' for [Dynamically generated class for RSpec
> > >>> example]
>
> > >>> >From the spec, what should I require in the spec to get all the HAML
> > >>> goodness?
>
> > >>> Thanks
>
> > >>> On Jul 12, 7:31 pm, Nathan Weizenbaum <[EMAIL PROTECTED]> wrote:
>
> > >>>> That's really weird. I can't see anywhere that it would be trying to
> > >>>> use
> > >>>> a Symbol as a String. However, I do know how to get "open" as a string.
> > >>>> The trick is that "open" and "puts," like "form_for" and the like,
> > >>>> write
> > >>>> directly to Haml's output buffer. However, there's a helper that allows
> > >>>> you to take something directly written to the buffer and get it as a
> > >>>> string, called "capture". It works like so:
>
> > >>>> capture do
> > >>>> open :foo, 'bar'
> > >>>> end
>
> > >>>> That would return "<foo>\n bar\n</foo>". So you could do "capture {
> > >>>> display_flash }.should == ...".
>
> > >>>> Try that and see if it works. If it doesn't, let me know.
>
> > >>>> - Nathan
>
> > >>>> wolfmanjm wrote:
>
> > >>>>> So presuming I can require haml or something and overcome this error,
> > >>>>> how would U check the output? Obviously this spec was written
> > >>>>> expecting the display_flash helper to return a string (which it used
> > >>>>> to do), by using open it now presumably renders directly to the haml
> > >>>>> buffer, so how would I retrieve that so I can test it? (Remember this
> > >>>>> helper spec runs without using actually using a view).
>
> > >>>>> Thanks
>
> > >>>>> On Jul 11, 10:13 pm, wolfmanjm <[EMAIL PROTECTED]> wrote:
>
> > >>>>>> Sure here you go...
>
> > >>>>>> TypeError in 'ApplicationHelper should display flash'
> > >>>>>> can't convert Symbol into String
> > >>>>>> /home/morris/work/snowdogsrus/rails/snowdogsrus/config/../app/helpers/
> > >>>>>> application_helper.rb:15:in `open'
> > >>>>>> /home/morris/work/snowdogsrus/rails/snowdogsrus/config/../app/helpers/
> > >>>>>> application_helper.rb:15:in `display_flash'
> > >>>>>> /home/morris/work/snowdogsrus/rails/snowdogsrus/config/../app/helpers/
> > >>>>>> application_helper.rb:13:in `each'
> > >>>>>> /home/morris/work/snowdogsrus/rails/snowdogsrus/config/../app/helpers/
> > >>>>>> application_helper.rb:13:in `display_flash'
> > >>>>>> /home/morris/work/snowdogsrus/rails/snowdogsrus/spec/helpers/
> > >>>>>> application_helper_spec.rb:12:
> > >>>>>> /home/morris/work/snowdogsrus/rails/snowdogsrus/spec/helpers/
> > >>>>>> application_helper_spec.rb:10:in `each'
> > >>>>>> /home/morris/work/snowdogsrus/rails/snowdogsrus/spec/helpers/
> > >>>>>> application_helper_spec.rb:10:
>
> > >>>>>> # application_helper_spec.rb
> > >>>>>> require File.dirname(__FILE__) + '/../spec_helper'
>
> > >>>>>> describe ApplicationHelper do
>
> > >>>>>> it "should display flash" do
> > >>>>>> for name in [:notice, :warning, :error]
> > >>>>>> flash[name]= "flash #{name.to_s} message"
> > >>>>>> display_flash.should == "<div
> > >>>>>> class=\"#{name}\">#{flash[name]}</
> > >>>>>> div>" # Line 12
> > >>>>>> flash[name]= nil
> > >>>>>> end
> > >>>>>> end
> > >>>>>> end
>
> > >>>>>> # application_helper.rb
>
> > >>>>>> def display_flash
> > >>>>>> for name in [:notice, :warning, :error]
> > >>>>>> if flash[name]
> > >>>>>> open :div, flash[name], {:class => name} # Line 15
> > >>>>>> end
> > >>>>>> end
> > >>>>>> nil
> > >>>>>> end
>
> > >>>>>> (Note I know this test will not match, but it is meant to fail the
> > >>>>>> first time ;)
> > >>>>>> However the error has nothing to do with the test, it is because open
> > >>>>>> is probably trying to call File::open
>
> > >>>>>> I don't believe HAML is even being loaded for this test.
>
> > >>>>>> On Jul 11, 6:19 pm, Nathan Weizenbaum <[EMAIL PROTECTED]> wrote:
>
> > >>>>>>> Do you have a backtrace I can see? I'm too lazy to do it myself :p.
> > >>>>>>> In
> > >>>>>>> my defense, it's the hottest day of the year in Seattle...
>
> > >>>>>>> - Nathan
>
> > >>>>>>> wolfmanjm wrote:
>
> > >>>>>>>> I like RSpec as it has the ability to test helpers standalone.
>
> > >>>>>>>> However I have not yet found the magic incantation to get it to
> > >>>>>>>> work
> > >>>>>>>> with a helper that uses open or puts.
>
> > >>>>>>>> I suspect you need to include HAML and setup some context for it to
> > >>>>>>>> render to.
>
> > >>>>>>>> Any ideas on how to do that would be appreciated as I had to
> > >>>>>>>> disable
> > >>>>>>>> many of my RSpec helper tests when I started using HAML open.
>
> > >>>>>>>> On Jul 10, 11:46 pm, Moses Hohman <[EMAIL PROTECTED]> wrote:
>
> > >>>>>>>>> What's the best way to test helper methods that generate HTML
> > >>>>>>>>> using
> > >>>>>>>>> Haml::Helpers#open? I want to test the helper method directly
> > >>>>>>>>> without
> > >>>>>>>>> using it in a view.
>
> > >>>>>>>>> thanks, M
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