use successful request shared example

Author: Sydney Young

spec/controllers/requirements_controller_spec.rb

@@ -11,9 +11,7 @@
         mock_user_sign_in(UserMock.new(:admin))
         get :index
       end
-      it { is_expected.to respond_with(:success) }
-      it { is_expected.to render_template(:index) }
-      it { is_expected.not_to set_flash }
+      it_behaves_like 'successful request', :index
       it 'should populate an array of all requirements' do
         expect(Requirement).to have_received(:all).twice
       end
@@ -34,9 +32,7 @@
         mock_user_sign_in(UserMock.new(:admin))
         get :new
       end
-      it { is_expected.to respond_with(:success) }
-      it { is_expected.to render_template(:new) }
-      it { is_expected.not_to set_flash }
+      it_behaves_like 'successful request', :new
       it 'assigns a new requirement to @requirement' do
         expect(Requirement).to have_received(:new).twice
       end