Add pipeline variables feature spec

spec/features/projects/pipelines/pipelines_spec.rb

@@ -522,6 +522,21 @@ describe 'Pipelines', :js do
 
             expect(Ci::Pipeline.last).to be_web
           end
+
+          context 'when variables are specified' do
+            it 'creates a new pipeline with variables' do
+              page.within '.ci-variable-row-body' do
+                fill_in "Input variable key", with: "key_name"
+                fill_in "Input variable value", with: "value"
+              end
+
+              expect { click_on 'Create pipeline' }
+                .to change { Ci::Pipeline.count }.by(1)
+
+              expect(Ci::Pipeline.last.variables.map { |var| var.slice(:key, :secret_value) })
+                .to eq [{ key: "key_name", secret_value: "value" }.with_indifferent_access]
+            end
+          end
         end
 
         context 'without gitlab-ci.yml' do