Added tests for the variables controller #update action

app/controllers/projects/variables_controller.rb

@@ -15,10 +15,11 @@ class Projects::VariablesController < Projects::ApplicationController
     @variable = @project.variables.find(params[:id])
 
     if @variable.update_attributes(project_params)
-      redirect_to namespace_project_settings_ci_cd_path(project.namespace, project), notice: 'Variable was successfully updated.'
+      flash[:notice] = 'Variables were successfully updated.'
     else
-      render action: "show"
+      flash[:alert] = @variable.errors.full_messages.join(',').html_safe
     end
+    redirect_to namespace_project_settings_ci_cd_path(project.namespace, project)
   end
 
   def create

spec/controllers/projects/variables_controller_spec.rb

@@ -20,7 +20,7 @@ describe Projects::VariablesController do
     end
 
     context 'variable is invalid' do
-      it 'shows a failure flash message' do
+      it 'shows an alert flash message' do
         post :create, namespace_id: project.namespace.to_param, project_id: project.to_param,
                       variable: { key: "..one", value: "two" }
         expect(flash[:alert]).to include 'Key can contain only letters, digits and \'_\'.'
@@ -28,4 +28,29 @@ describe Projects::VariablesController do
       end
     end
   end
+
+  describe 'POST #update' do
+    let(:variable) { create(:ci_variable) }
+
+    context 'updating a variable with valid characters' do
+      before do
+        variable.gl_project_id = project.id
+        project.variables << variable
+      end
+
+      it 'shows a success flash message' do
+        post :update, namespace_id: project.namespace.to_param, project_id: project.to_param,
+          id: variable.id, variable: { key: variable.key, value: 'two' }
+        expect(flash[:notice]).to include 'Variables were successfully updated.'
+        expect(response).to redirect_to(namespace_project_settings_ci_cd_path(project.namespace, project))
+      end
+
+      it 'shows an alert flash message' do
+        post :update, namespace_id: project.namespace.to_param, project_id: project.to_param,
+          id: variable.id, variable: { key: '?', value: variable.value }
+        expect(flash[:alert]).to include 'Key can contain only letters, digits and \'_\'.'
+        expect(response).to redirect_to(namespace_project_settings_ci_cd_path(project.namespace, project))
+      end
+    end
+  end
 end