User danger helper for all_changed_files

spec/tooling/danger/project_helper_spec.rb

@@ -236,7 +236,7 @@ RSpec.describe Tooling::Danger::ProjectHelper do
     subject { project_helper.all_ee_changes }
 
     it 'returns all changed files starting with ee/' do
-      expect(project_helper).to receive(:all_changed_files).and_return(%w[fr/ee/beer.rb ee/wine.rb ee/lib/ido.rb ee.k])
+      expect(fake_helper).to receive(:all_changed_files).and_return(%w[fr/ee/beer.rb ee/wine.rb ee/lib/ido.rb ee.k])
 
       is_expected.to match_array(%w[ee/wine.rb ee/lib/ido.rb])
     end

tooling/danger/project_helper.rb

@@ -149,7 +149,7 @@ module Tooling
       end
 
       def all_ee_changes
-        all_changed_files.grep(%r{\Aee/})
+        helper.all_changed_files.grep(%r{\Aee/})
       end
 
       def project_name