Prevents review app to render an empty dropdown.

When a deployment has no files to show in the dropdown we
fallback to the regular single button for the review app link.

This commit moves the review app link into a component since it's
used twice.

2 files changed, 58 insertions, 0 deletions

diff --git a/spec/javascripts/vue_mr_widget/components/deployment_spec.js b/spec/javascripts/vue_mr_widget/components/deployment_spec.js
index d26ffa4b4a6..059abc8b7fb 100644
--- a/spec/javascripts/vue_mr_widget/components/deployment_spec.js
+++ b/spec/javascripts/vue_mr_widget/components/deployment_spec.js
@@ -211,6 +211,26 @@ describe('Deployment component', () => {
     });
   });
 
+  describe('without changes', () => {
+    beforeEach(() => {
+      window.gon = window.gon || {};
+      window.gon.features = window.gon.features || {};
+      window.gon.features.ciEnvironmentsStatusChanges = true;
+      delete deploymentMockData.changes;
+
+      vm = mountComponent(Component, { deployment: { ...deploymentMockData } });
+    });
+
+    afterEach(() => {
+      delete window.gon.features.ciEnvironmentsStatusChanges;
+    });
+
+    it('renders the link to the review app without dropdown', () => {
+      expect(vm.$el.querySelector('.js-mr-wigdet-deployment-dropdown')).toBeNull();
+      expect(vm.$el.querySelector('.js-deploy-url-feature-flag')).not.toBeNull();
+    });
+  })
+
   describe('deployment status', () => {
     describe('running', () => {
       beforeEach(() => {
diff --git a/spec/javascripts/vue_mr_widget/components/review_app_link_spec.js b/spec/javascripts/vue_mr_widget/components/review_app_link_spec.js
new file mode 100644
index 00000000000..68a65bd21c6
--- /dev/null
+++ b/spec/javascripts/vue_mr_widget/components/review_app_link_spec.js
@@ -0,0 +1,38 @@
+import Vue from 'vue';
+import component from '~/vue_merge_request_widget/components/review_app_link.vue';
+import mountComponent from '../../helpers/vue_mount_component_helper';
+
+describe('review app link', () => {
+  const Component = Vue.extend(component);
+  const props = {
+    link: '/review',
+    cssClass: 'js-link',
+  };
+  let vm;
+  let el;
+
+  beforeEach(() => {
+    vm = mountComponent(Component, props);
+    el = vm.$el;
+  });
+
+  afterEach(() => {
+    vm.$destroy();
+  });
+
+  it('renders provided link as href attribute', () => {
+    expect(el.getAttribute('href')).toEqual(props.link);
+  });
+
+  it('renders provided cssClass as class attribute', () => {
+    expect(el.getAttribute('class')).toEqual(props.cssClass);
+  });
+
+  it('renders View app text', () => {
+    expect(el.textContent.trim()).toEqual('View app');
+  });
+
+  it('renders svg icon', () => {
+    expect(el.querySelector('svg')).not.toBeNull();
+  });
+});