japh(r) by Chris Strom: Meal Menu Items

Saturday, May 30, 2009

Meal Menu Items

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I left off yesterday with a failing Cucumber step, making it easy to remember where to pick up today:

cstrom@jaynestown:~/repos/eee-code$ cucumber features -n \
>   -s "Browsing a meal on a specific date"
Feature: Browse Meals

  So that I can find meals made on special occasions
  As a person interested in finding meals
  I want to browse meals by date

  Scenario: Browsing a meal on a specific date
    Given a "Focaccia!" meal enjoyed on March 3, 2009
    And a "Focaccia" recipe from March 3, 2009
    When I view the "Focaccia!" meal
    Then I should see the "Focaccia!" title
    And I should see a link to the "Focaccia" recipe in the menu
      expected following output to contain a <a>the "Focaccia" recipe in the menu</a> tag:
      <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
      <html><body>
      <h1>
        Focaccia!
      </h1>
      <div id="summary">
        <p>meal summary</p>
      </div>
      <div id="description">
        <p>meal description</p>
      </div>
      </body></html>
       (Spec::Expectations::ExpectationNotMetError)
      features/browse_meals.feature:42:in `And I should see a link to the "Focaccia" recipe in the menu'
...

Before I get recipes in the meal's menu, I need to get the menu itself presented via the Haml template. In order to describe how the Haml template will display the menu, I add a single menu item to the sample meal in the before(:each) block in the RSpec specification:


  before(:each) do
    @title  = "Meal Title"
    @summary = "Meal Summary"
    @description = "Meal Description"
    assigns[:meal] = @meal = {
      'title'       => @title,
      'summary'     => @summary,
      'description' => @description,
      'menu'        => ["Peanut Butter and Jelly Sandwich"]
    }
  end

I would like to display the menu after the summary, in CSS3 terms: "#summary + #menu". The example that I would like to have pass is:

  it "should include the menu after the summary" do
    render("/views/meal.haml")
    response.should have_selector("#summary + ul#menu li",
                                  :content => "Peanut Butter and Jelly Sandwich")
  end

I can get that example to pass with some more minimalistic Haml:

#summary
  = wiki @meal['summary']

%ul#menu
  - @meal['menu'].each do |menu_item|
    %li= menu_item

To get the recipes in the menu items, I need only call the wiki helper, which applies the recipe_link helper to [recipe:...] wiki text. I am not going to test that the Haml template properly pulls the recipe into the menu—too much composition in a unit test for my taste. I will leave that to the Cucumber scenario. To drive the Haml template, I will use an example of simple Textile wikifying:

  it "should wikify the menu items" do
    assigns[:meal]['menu'] << "foo *bar* baz"
    render("/views/meal.haml")
    response.should have_selector("ul#menu li strong",
                                  :content => "bar")
  end

A simple invocation of the wiki helper makes that example pass:

%ul#menu
  - @meal['menu'].each do |menu_item|
    %li= wiki(menu_item)

Back in Cucumber, I realize that I need to create the recipe before I create the meal (so that the meal can include the recipe in its menu). With some quick rearranging of the scenario text, I am able to verify that recipe links in meal menu items do, indeed, work as expected:

(commit)

Tomorrow, it looks like I will be working through the breadcrumbs on the meal page.

japh(r) by Chris Strom

Saturday, May 30, 2009

Meal Menu Items

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