Fix `body_classes` test for glitch-soc

spec/helpers/application_helper_spec.rb

@@ -32,7 +32,8 @@ describe ApplicationHelper do
       before do
         without_partial_double_verification do
           allow(helper).to receive(:body_class_string).and_return('modal-layout compose-standalone')
-          allow(helper).to receive(:current_theme).and_return('default')
+          allow(helper).to receive(:current_flavour).and_return('glitch')
+          allow(helper).to receive(:current_skin).and_return('default')
           allow(helper).to receive(:current_account).and_return(Fabricate(:account))
         end
       end