Add Component to Confirm Environment Rollback

Ensure a vue.js component to confirm the re-deployment/rollback of an
environment pops up when rollback/re-deploy has been clicked so the user
must confirm their actions before accidentally rolling back or
re-deploying an environment.

Only on the `environment-table` view.

3 files changed, 162 insertions, 3 deletions

diff --git a/spec/javascripts/environments/confirm_rollback_modal_spec.js b/spec/javascripts/environments/confirm_rollback_modal_spec.js
new file mode 100644
index 00000000000..05715bce38f
--- /dev/null
+++ b/spec/javascripts/environments/confirm_rollback_modal_spec.js
@@ -0,0 +1,70 @@
+import { shallowMount } from '@vue/test-utils';
+import { GlModal } from '@gitlab/ui';
+import ConfirmRollbackModal from '~/environments/components/confirm_rollback_modal.vue';
+import eventHub from '~/environments/event_hub';
+
+describe('Confirm Rollback Modal Component', () => {
+  let environment;
+
+  beforeEach(() => {
+    environment = {
+      name: 'test',
+      last_deployment: {
+        commit: {
+          short_id: 'abc0123',
+        },
+      },
+      modalId: 'test',
+    };
+  });
+
+  it('should show "Rollback" when isLastDeployment is false', () => {
+    const component = shallowMount(ConfirmRollbackModal, {
+      propsData: {
+        environment: {
+          ...environment,
+          isLastDeployment: false,
+        },
+      },
+    });
+    const modal = component.find(GlModal);
+
+    expect(modal.attributes('title')).toContain('Rollback');
+    expect(modal.attributes('title')).toContain('test');
+    expect(modal.attributes('ok-title')).toBe('Rollback');
+    expect(modal.text()).toContain('commit abc0123');
+    expect(modal.text()).toContain('Are you sure you want to continue?');
+  });
+
+  it('should show "Re-deploy" when isLastDeployment is true', () => {
+    const component = shallowMount(ConfirmRollbackModal, {
+      propsData: {
+        environment: {
+          ...environment,
+          isLastDeployment: true,
+        },
+      },
+    });
+    const modal = component.find(GlModal);
+
+    expect(modal.attributes('title')).toContain('Re-deploy');
+    expect(modal.attributes('title')).toContain('test');
+    expect(modal.attributes('ok-title')).toBe('Re-deploy');
+    expect(modal.text()).toContain('commit abc0123');
+    expect(modal.text()).toContain('Are you sure you want to continue?');
+  });
+
+  it('should emit the "rollback" event when "ok" is clicked', () => {
+    environment = { ...environment, isLastDeployment: true };
+    const component = shallowMount(ConfirmRollbackModal, {
+      propsData: {
+        environment,
+      },
+    });
+    const eventHubSpy = spyOn(eventHub, '$emit');
+    const modal = component.find(GlModal);
+    modal.vm.$emit('ok');
+
+    expect(eventHubSpy).toHaveBeenCalledWith('rollbackEnvironment', environment);
+  });
+});
diff --git a/spec/javascripts/environments/environment_rollback_spec.js b/spec/javascripts/environments/environment_rollback_spec.js
index 79f33c5bc8a..8c47f6a12c0 100644
--- a/spec/javascripts/environments/environment_rollback_spec.js
+++ b/spec/javascripts/environments/environment_rollback_spec.js
@@ -1,8 +1,11 @@
 import Vue from 'vue';
+import { shallowMount } from '@vue/test-utils';
+import { GlButton } from '@gitlab/ui';
+import eventHub from '~/environments/event_hub';
 import rollbackComp from '~/environments/components/environment_rollback.vue';
 
 describe('Rollback Component', () => {
-  const retryURL = 'https://gitlab.com/retry';
+  const retryUrl = 'https://gitlab.com/retry';
   let RollbackComponent;
 
   beforeEach(() => {
@@ -13,8 +16,9 @@ describe('Rollback Component', () => {
     const component = new RollbackComponent({
       el: document.querySelector('.test-dom-element'),
       propsData: {
-        retryUrl: retryURL,
+        retryUrl,
         isLastDeployment: true,
+        environment: {},
       },
     }).$mount();
 
@@ -25,11 +29,33 @@ describe('Rollback Component', () => {
     const component = new RollbackComponent({
       el: document.querySelector('.test-dom-element'),
       propsData: {
-        retryUrl: retryURL,
+        retryUrl,
         isLastDeployment: false,
+        environment: {},
       },
     }).$mount();
 
     expect(component.$el).toHaveSpriteIcon('redo');
   });
+
+  it('should emit a "rollback" event on button click', () => {
+    const eventHubSpy = spyOn(eventHub, '$emit');
+    const component = shallowMount(RollbackComponent, {
+      propsData: {
+        retryUrl,
+        environment: {
+          name: 'test',
+        },
+      },
+    });
+    const button = component.find(GlButton);
+
+    button.vm.$emit('click');
+
+    expect(eventHubSpy).toHaveBeenCalledWith('requestRollbackEnvironment', {
+      retryUrl,
+      isLastDeployment: true,
+      name: 'test',
+    });
+  });
 });
diff --git a/spec/views/projects/deployments/_confirm_rollback_modal_spec.html.rb b/spec/views/projects/deployments/_confirm_rollback_modal_spec.html.rb
new file mode 100644
index 00000000000..54ec4f32856
--- /dev/null
+++ b/spec/views/projects/deployments/_confirm_rollback_modal_spec.html.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'projects/deployments/_confirm_rollback_modal' do
+  let(:environment) { create(:environment, :with_review_app) }
+  let(:deployments) { environment.deployments }
+  let(:project) { environment.project }
+
+  before do
+    assign(:environment, environment)
+    assign(:deployments, deployments)
+    assign(:project, project)
+  end
+
+  context 'when re-deploying last deployment' do
+    let(:deployment) { deployments.first }
+
+    before do
+      allow(view).to receive(:deployment).and_return(deployment)
+    end
+
+    it 'shows "re-deploy"' do
+      render
+
+      expect(rendered).to have_selector('h4', text: "Re-deploy environment #{environment.name}?")
+      expect(rendered).to have_selector('p', text: "This action will relaunch the job for commit #{deployment.short_sha}, putting the environment in a previous version. Are you sure you want to continue?")
+      expect(rendered).to have_selector('a.btn-danger', text: 'Re-deploy')
+    end
+
+    it 'links to re-deploying the environment' do
+      expected_link = retry_project_job_path(environment.project, deployment.deployable)
+
+      render
+
+      expect(rendered).to have_selector("a[href='#{expected_link}']", text: 'Re-deploy')
+    end
+  end
+
+  context 'when rolling back to previous deployment' do
+    let(:deployment) { create(:deployment, environment: environment) }
+
+    before do
+      allow(view).to receive(:deployment).and_return(deployment)
+    end
+
+    it 'shows "rollback"' do
+      render
+
+      expect(rendered).to have_selector('h4', text: "Rollback environment #{environment.name}?")
+      expect(rendered).to have_selector('p', text: "This action will run the job defined by staging for commit #{deployment.short_sha}, putting the environment in a previous version. You can revert it by re-deploying the latest version of your application. Are you sure you want to continue?")
+      expect(rendered).to have_selector('a.btn-danger', text: 'Rollback')
+    end
+
+    it 'links to re-deploying the environment' do
+      expected_link = retry_project_job_path(environment.project, deployment.deployable)
+
+      render
+
+      expect(rendered).to have_selector("a[href='#{expected_link}']", text: 'Rollback')
+    end
+  end
+end