Test coverage

spec/controllers/application_controller_spec.rb

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+require 'rails_helper'
+
+RSpec.describe ApplicationController do
+  let(:controller) { ApplicationController.new }
+  describe "authentication helper methods" do
+    it "generates unique guest usernames" do
+      expect(controller.guest_username_authentication_key('guest')).to eq 'guest'
+      expect(controller.guest_username_authentication_key('fred')).to start_with 'guest_'
+    end
+
+    context "creating user objects" do
+      let(:user) { controller.create_guest_user }
+
+      after do
+        user.destroy
+      end
+
+      it "creates guest user objects" do
+        expect(user.username).to start_with('guest_')
+      end
+    end
+  end
+end

spec/helpers/spotlight_helper_spec.rb

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+require 'rails_helper'
+
+describe SpotlightHelper do
+  let(:helper) { TestingHelper.new }
+  before do
+    class TestingHelper
+      include SpotlightHelper
+      include ActionView::Helpers::TagHelper
+    end
+  end
+  after do
+    Object.send(:remove_const, :TestingHelper)
+  end
+
+  describe '#render_document_heading' do
+    let(:presenter) { instance_double('RTLShowPresenter', class: RTLShowPresenter) }
+
+    before do
+      allow(helper).to receive(:presenter).and_return(presenter)
+      allow(presenter).to receive(:header).and_return('title')
+    end
+
+    it 'returns a single ltr span tag' do
+      tag = helper.render_document_heading( { title: 'title' } )
+      expect(tag).to eq '<h4 itemprop="name">title</h4>'
+    end
+  end
+end