Add TakePartController

- add view and helpers
- convert test suite to RSpec on move
- note that we explicitly remove the content-bottom-margin div
  class that was immediately inside the 2/3rds column. This is
  a style used in a handful of government-frontend document
  types which (on review with frontend developers) does not
  really fix the problem it's trying to fix (insufficient bottom
  margin on some tablet-sized devices). This has been captured
  as alphagov/govuk_publishing_components#4220
  to be fixed properly in the components gem.
- We replace the call to TitleHelper in the view with a direct call,
  as it didn't add much and it's not clear whether it's worth
  copying that helper across yet.

Commit audit trail:
- https://github.com/alphagov/government-frontend/blob/6523741691ddfb9551967311a3f79775e9403ecf/app/views/content_items/take_part.html.erb
- https://github.com/alphagov/government-frontend/blob/6523741691ddfb9551967311a3f79775e9403ecf/test/integration/take_part_test.rb

app/controllers/take_part_controller.rb

@@ -0,0 +1,2 @@
+class TakePartController < ContentItemsController
+end

app/views/take_part/show.html.erb

@@ -0,0 +1,42 @@
+<% content_for :title do %>
+  <%= @content_item.title %> - GOV.UK
+<% end %>
+
+<% content_for :extra_headers do %>
+  <%= render "govuk_publishing_components/components/machine_readable_metadata", { content_item: @content_item.to_h, schema: :article } %>
+  <meta name="description" content="<%= strip_tags(@content_item.description) %>">
+<% end %>
+
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= render "govuk_publishing_components/components/title", {
+        title: @content_item.title,
+        context: I18n.t("formats.#{@content_item.document_type}", count: 1),
+        context_locale: t_locale_fallback("formats.#{@content_item.document_type}", count: 1),
+      }
+    %>
+    <%= render "govuk_publishing_components/components/lead_paragraph", text: @content_item.description %>
+  </div>
+
+  <%= render 'shared/translations' %>
+</div>
+
+<div class="govuk-grid-row">
+  <div class="govuk-grid-column-two-thirds">
+    <%= render 'components/figure',
+    src: @content_item.image["url"],
+    alt: @content_item.image["alt_text"],
+    credit: @content_item.image["credit"],
+    caption: @content_item.image["caption"] if @content_item.image %>
+
+    <%= render "govuk_publishing_components/components/govspeak", {
+      direction: page_text_direction
+    } do %>
+    <%= raw(@content_item.body) %>
+    <% end %>
+  </div>
+  <%= render 'shared/sidebar_navigation' %>
+</div>
+
+<%= render 'shared/footer_navigation' %>

config/routes.rb

@@ -70,8 +70,14 @@
   # Media previews
   get "/media/:id/:filename/preview", to: "csv_preview#show", filename: /[^\/]+/
 
-  # Placeholder for attachments being virus-scanned
-  get "/government/placeholder", to: "placeholder#show"
+  scope "/government" do
+    # Placeholder for attachments being virus-scanned
+    get "/placeholder", to: "placeholder#show"
+
+    scope "/get-involved" do
+      get "/take-part/:slug", to: "take_part#show"
+    end
+  end
 
   # Simple Smart Answer pages
   constraints FormatRoutingConstraint.new("simple_smart_answer") do

spec/requests/take_part_spec.rb

@@ -0,0 +1,13 @@
+RSpec.describe "Take Part" do
+  before do
+    content_store_has_example_item("/government/get-involved/take-part/tp1", schema: :take_part)
+  end
+
+  context "GET index" do
+    it "returns 200" do
+      get "/government/get-involved/take-part/tp1"
+
+      expect(response).to have_http_status(:ok)
+    end
+  end
+end

spec/system/take_part_spec.rb

@@ -0,0 +1,27 @@
+RSpec.describe "TakePart" do
+  it_behaves_like "it has meta tags", "take_part", "/government/get-involved/take-part"
+  it_behaves_like "it has meta tags for images", "take_part", "/government/get-involved/take-part"
+
+  before do
+    content_store_has_example_item("/government/get-involved/take-part/tp1", schema: :take_part)
+  end
+
+  context "when visiting a Take Part page" do
+    it "displays the take_part page" do
+      visit "/government/get-involved/take-part/tp1"
+
+      expect(page).to have_title("Become a councillor - GOV.UK")
+
+      expect(page).to have_css("h1", text: "Become a councillor")
+      expect(page).to have_text("All councils are led by democratically elected councillors who set the vision and direction, and represent their local community.")
+
+      assert page.has_text?("There are roughly 20,000 local councillors in England. Councillors are elected to the local council to represent their own local community, so they must either live or work in the area.")
+    end
+
+    it "does not display a single page notification button" do
+      visit "/government/get-involved/take-part/tp1"
+
+      expect(page).not_to have_css(".gem-c-single-page-notification-button")
+    end
+  end
+end