Update document list component branding

- use new methods
- add test

app/views/govuk_publishing_components/components/_document_list.html.erb

@@ -7,7 +7,7 @@
   brand_helper = GovukPublishingComponents::Presenters::BrandHelper.new(brand)
 %>
 <% if items.any? %>
-  <ol class="gem-c-document-list<%= margin_bottom_class %><%= margin_top_class %> <%= brand_helper.get_brand %>">
+  <ol class="gem-c-document-list<%= margin_bottom_class %><%= margin_top_class %> <%= brand_helper.brand_class %>">
     <% items.each do |item| %>
       <li class="gem-c-document-list__item">
         <h3 class="gem-c-document-list__item-title">
@@ -16,7 +16,7 @@
               item[:link][:text],
               item[:link][:path],
               data: item[:link][:data_attributes],
-              class: brand_helper.get_brand_element("color")
+              class: brand_helper.color_class
             )
           %>
         </h3>

spec/components/document_list_spec.rb

@@ -131,4 +131,25 @@ def component_name
     assert_select "#{li} a[data-track-label='/link2']", text: "Link 2"
     assert_select "#{li} a[data-track-options='{\"dimension28\":\"2\",\"dimension29\":\"Link 2\"}']", text: "Link 2"
   end
+
+  it "adds branding correctly" do
+    render_component(
+      brand: 'attorney-generals-office',
+      items: [
+        {
+          link: {
+            text: "School behaviour and attendance: parental responsibility measures",
+            path: "/government/publications/parental-responsibility-measures-for-behaviour-and-attendance",
+          },
+          metadata: {
+            public_updated_at: Time.zone.parse("2017-01-05 14:50:33 +0000"),
+            document_type: "Statutory guidance"
+          }
+        }
+      ]
+    )
+
+    assert_select '.gem-c-document-list.brand--attorney-generals-office'
+    assert_select '.gem-c-document-list .gem-c-document-list__item-title .brand__color'
+  end
 end