Add specs for warning message shown in Auto DevOps settings

spec/models/project_auto_devops_spec.rb

@@ -9,9 +9,17 @@ describe ProjectAutoDevops do
   it { is_expected.to respond_to(:updated_at) }
 
   describe '#has_domain?' do
-    let(:auto_devops) { build_stubbed(:project_auto_devops, project: project, domain: 'domain.com') }
+    context 'when domain is defined' do
+      let(:auto_devops) { build_stubbed(:project_auto_devops, project: project, domain: 'domain.com') }
+
+      it { expect(auto_devops).to have_domain }
+    end
 
-    it { is_expected.to have_domain }
+    context 'when domain is empty' do
+      let(:auto_devops) { build_stubbed(:project_auto_devops, project: project, domain: '') }
+
+      it { expect(auto_devops).not_to have_domain }
+    end
   end
 
   describe '#variables' do

spec/views/projects/pipelines_settings/_show.html.haml_spec.rb

+require 'spec_helper'
+
+describe 'projects/pipelines_settings/_show' do
+  let(:project) { create(:project, :repository) }
+
+  before do
+    assign :project, project
+  end
+
+  context 'when kubernetes is not active' do
+    context 'when auto devops domain is not defined' do
+      it 'shows warning message' do
+        render
+
+        expect(rendered).to have_css('.settings-message')
+        expect(rendered).to have_text('Auto Review Apps and Auto Deploy need a domain name and the')
+        expect(rendered).to have_link('Kubernetes service')
+      end
+    end
+
+    context 'when auto devops domain is defined' do
+      before do
+        project.build_auto_devops(domain: 'example.com')
+      end
+
+      it 'shows warning message' do
+        render
+
+        expect(rendered).to have_css('.settings-message')
+        expect(rendered).to have_text('Auto Review Apps and Auto Deploy need the')
+        expect(rendered).to have_link('Kubernetes service')
+      end
+    end
+  end
+
+  context 'when kubernetes is active' do
+    before do
+      project.build_kubernetes_service(active: true)
+    end
+
+    context 'when auto devops domain is not defined' do
+      it 'shows warning message' do
+        render
+
+        expect(rendered).to have_css('.settings-message')
+        expect(rendered).to have_text('Auto Review Apps and Auto Deploy need a domain name to work correctly.')
+      end
+    end
+
+    context 'when auto devops domain is defined' do
+      before do
+        project.build_auto_devops(domain: 'example.com')
+      end
+
+      it 'does not show warning message' do
+        render
+
+        expect(rendered).not_to have_css('.settings-message')
+      end
+    end
+  end
+end