Use remove_breadcrumbs method to omit breadcrumbs

This relies on the content item for the landing page existing, which it doesn't yet, and so it looks broken (both sets of breadcrumbs are currently rendering)

app/helpers/application_helper.rb

@@ -28,4 +28,14 @@ def wrapper_class(publication = nil)
   def current_path_without_query_string
     request.original_fullpath.split("?", 2).first
   end
+
+  def remove_breadcrumbs(content_item)
+    remove_breadcrumbs = false
+
+    if content_item.respond_to?(:is_a_landing_page?) && content_item.is_a_landing_page?
+      remove_breadcrumbs = true
+    end
+
+    remove_breadcrumbs
+  end
 end

app/views/layouts/application.html.erb

@@ -7,7 +7,7 @@
     <% if publication && publication.in_beta %>
       <%= render 'govuk_publishing_components/components/phase_banner', phase: "beta" %>
     <% end %>
-    <% unless current_page?(root_path) || !(publication || @calendar) || !content_item.is_a_landing_page? %>
+    <% unless current_page?(root_path) || !(publication || @calendar) || remove_breadcrumbs(content_item) %>
       <%= render 'govuk_publishing_components/components/contextual_breadcrumbs', content_item: content_item_hash %>
     <% end %>
     <% if local_assigns %>

spec/helpers/application_helper_spec.rb

@@ -48,4 +48,30 @@ def dummy_publication
       expect(current_path_without_query_string).to eq("/foo/bar")
     end
   end
+
+  describe "#remove_breadcrumbs" do
+    describe "when is_landing_page? is true" do
+      let(:content_item) { ContentItem.new({ "schema" => "landing_page" }) }
+
+      it "removes breadcrumbs" do
+        expect(remove_breadcrumbs(content_item)).to eq(true)
+      end
+    end
+
+    describe "when is_landing_page? is false" do
+      let(:content_item) { ContentItem.new({ "schema" => "a_different_page" }) }
+
+      it "does not remove breadcrumbs" do
+        expect(remove_breadcrumbs(content_item)).to eq(false)
+      end
+    end
+
+    describe "when is_landing_page? is undefined" do
+      let(:content_item) { ContentItem.new({ }) }
+
+      it "does not remove breadcrumbs" do
+        expect(remove_breadcrumbs(content_item)).to eq(false)
+      end
+    end
+  end
 end