japh(r) by Chris Strom: RSS Feeds by Coincidence

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To finish off my meals RSS feed, I need to implement meal links and published dates in the items. First up is "Then I should see a meal link" which I ought to be able to define with:

Then /^I should see a meal link$/ do
  response.
    should have_selector("link", :content => "http://www.eeecooks.com/meals/2009/06/11")
end

Running this with Cucumber, I get:

   When I access the meal RSS feed            # features/step_definitions/rss.rb:1
    Then I should see the 10 most recent meals # features/step_definitions/rss.rb:6
    And I should see the summary of each meal  # features/step_definitions/rss.rb:20
    And I should see a meal link               # features/step_definitions/rss.rb:26
      expected following output to contain a <link>http://www.eeecooks.com/meals/2009/06/11</link> tag:
      <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
      <?xml version="1.0" encoding="UTF-8"?><html><body><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/"><channel><title>EEE Cooks: Meals</title>
      <link>http://www.eeecooks.com
          <description>Meals from a Family Cookbook</description><item><title>Meal 0</title>
      <link>http://www.eeecooks.com/meals/2009/06/11
            <description>meal summary</description></item><item><title>Meal 1</title>
      <link>http://www.eeecooks.com/meals/2009/06/01
            <description>meal summary</description></item><item><title>Meal 2</title>
      <link>http://www.eeecooks.com/meals/2009/05/22
            <description>meal summary</description></item><item><title>Meal 3</title>
      <link>http://www.eeecooks.com/meals/2009/05/12
            <description>meal summary</description></item><item><title>Meal 4</title>
      <link>http://www.eeecooks.com/meals/2009/05/02
            <description>meal summary</description></item><item><title>Meal 5</title>
      <link>http://www.eeecooks.com/meals/2009/04/22
            <description>meal summary</description></item><item><title>Meal 6</title>
      <link>http://www.eeecooks.com/meals/2009/04/12
            <description>meal summary</description></item><item><title>Meal 7</title>
      <link>http://www.eeecooks.com/meals/2009/04/02
            <description>meal summary</description></item><item><title>Meal 8</title>
      <link>http://www.eeecooks.com/meals/2009/03/23
            <description>meal summary</description></item><item><title>Meal 9</title>
      <link>http://www.eeecooks.com/meals/2009/03/13
            <description>meal summary</description></item></channel></rss></body></html>
       (Spec::Expectations::ExpectationNotMetError)
      features/rss.feature:13:in `And I should see a meal link'
    And I should see a meal published date     # features/rss.feature:14

1 scenario
1 failed step
1 undefined step
4 passed steps

Uh... what? I see that URL in the output. Why no match?

The output does not quite match what I expect, so let me puts the output in the Sinatra application:

...
  puts rss.to_s

  rss.to_s
end

The output is exactly what I expect:

<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0"
  xmlns:content="http://purl.org/rss/1.0/modules/content/"
  xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd"
  xmlns:dc="http://purl.org/dc/elements/1.1/"
  xmlns:trackback="http://madskills.com/public/xml/rss/module/trackback/">
  <channel>
    <title>EEE Cooks: Meals</title> 
    <link>http://www.eeecooks.com</link>
    <description>Meals from a Family Cookbook</description>
    <item>
      <title>Meal 0</title>
      <link>http://www.eeecooks.com/meals/2009/06/11</link>
      <description>meal summary</description>
    </item>
    <item>
      <title>Meal 1</title>
      <link>http://www.eeecooks.com/meals/2009/06/01</link>
      <description>meal summary</description>
    </item>
    <item>
      <title>Meal 2</title>
...

After mucking with the link content a bit and even trying have_xpath, I have to concede defeat. Rather than checking for a <link> tag with content "http://www.eeecooks.com/meals/2009/06/11", I check only for the content "http://www.eeecooks.com/meals/2009/06/11":

Then /^I should see a meal link$/ do
  response.
    should contain("http://www.eeecooks.com/meals/2009/06/11")
end

That works. I will leave it for now, but it will gnaw at me for a couple of days unless I can figure out what went wrong there.

With that sort of working, I move on to the publication date. The <pubDate> tag in the legacy application looks like "Thu, 10 Jul 2008 00:00:00 +0000":

Then /^I should see a meal published date$/ do
  response.
    should contain("Thu, 11 Jun 2009 00:00:00 +0000")
end

I hard-code this in the RSS::Maker code block in the Sinatra application:

  rss = RSS::Maker.make("2.0") do |maker|
    maker.channel.title = "EEE Cooks: Meals"
    maker.channel.link  = ROOT_URL
    maker.channel.description = "Meals from a Family Cookbook"
    @meal_view.each do |couch_rec|
      data = RestClient.get "#{@@db}/#{couch_rec['key']}"
      meal = JSON.parse(data)
      date = Date.parse(meal['date'])
      maker.items.new_item do |item|
        item.link = ROOT_URL + date.strftime("/meals/%Y/%m/%d")
        item.title = meal['title']
        item.pubDate = "Thu, 11 Jul 2009 00:00:00 +0000"
        item.description = meal['summary']
      end
    end
  end

When I run the Cucumber scenario now, things fail immediately:

  Scenario: Meal RSS                           # features/rss.feature:7
    Given 20 yummy meals                       # features/step_definitions/site.rb:1
    When I access the meal RSS feed            # features/step_definitions/rss.rb:1
      value <Thu, 11 Jul 2009 00:00:00 +0000> of tag <dc:date> is not available. (RSS::NotAvailableValueError)
      /usr/lib/ruby/1.8/rss/dublincore.rb:143:in `content='
...

Geez, it it really not my day.

Google is not my ally on this particular error, but, eventually, I determine that pubDate needs a Time object:

        item.pubDate = Time.parse(meal['date'])

And finally, I have this scenario complete:

cstrom@jaynestown:~/repos/eee-code$ cucumber features -n -s "Meal RSS"
Sinatra::Test is deprecated; use Rack::Test instead.
Feature: RSS

  So that I tell my user when there are updates to this great cooking site
  As an RSS bot
  I want to be able to consume your RSS

  Scenario: Meal RSS
    Given 20 yummy meals
    When I access the meal RSS feed
    Then I should see the 10 most recent meals
    And I should see the summary of each meal
    And I should see a meal link
    And I should see a meal published date

1 scenario
6 passed steps

Tomorrow: the recipe RSS feed. Hopefully, lessons learned from the meal RSS feed will make it go significantly smoother.

japh(r) by Chris Strom

Wednesday, July 1, 2009

RSS Feeds by Coincidence

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