Add helper methods for domains allow and export blocks files (#28196)

spec/controllers/admin/export_domain_allows_controller_spec.rb

@@ -24,7 +24,7 @@ RSpec.describe Admin::ExportDomainAllowsController do
 
       get :export, params: { format: :csv }
       expect(response).to have_http_status(200)
-      expect(response.body).to eq(File.read(File.join(file_fixture_path, 'domain_allows.csv')))
+      expect(response.body).to eq(domain_allows_csv_file)
     end
   end
 
@@ -40,7 +40,7 @@ RSpec.describe Admin::ExportDomainAllowsController do
       # Domains should now be added
       get :export, params: { format: :csv }
       expect(response).to have_http_status(200)
-      expect(response.body).to eq(File.read(File.join(file_fixture_path, 'domain_allows.csv')))
+      expect(response.body).to eq(domain_allows_csv_file)
     end
 
     it 'displays error on no file selected' do
@@ -49,4 +49,10 @@ RSpec.describe Admin::ExportDomainAllowsController do
       expect(flash[:error]).to eq(I18n.t('admin.export_domain_allows.no_file'))
     end
   end
+
+  private
+
+  def domain_allows_csv_file
+    File.read(File.join(file_fixture_path, 'domain_allows.csv'))
+  end
 end

spec/controllers/admin/export_domain_blocks_controller_spec.rb

@@ -26,7 +26,13 @@ RSpec.describe Admin::ExportDomainBlocksController do
 
       get :export, params: { format: :csv }
       expect(response).to have_http_status(200)
-      expect(response.body).to eq(File.read(File.join(file_fixture_path, 'domain_blocks.csv')))
+      expect(response.body).to eq(domain_blocks_csv_file)
+    end
+
+    private
+
+    def domain_blocks_csv_file
+      File.read(File.join(file_fixture_path, 'domain_blocks.csv'))
     end
   end