MR work continues

Add new page object for ToDos page
Add autoloader for the new page object
Add new selectors on ToDos page elements
Complete test scenario

app/views/dashboard/todos/_todo.html.haml

@@ -2,7 +2,7 @@
   .todo-avatar
     = author_avatar(todo, size: 40)
 
-  .todo-item.todo-block.align-self-center
+  .todo-item.todo-block.align-self-center{ data: { qa_selector: "todo_item_container" } }
     .todo-title
       - if todo_author_display?(todo)
         = todo_target_state_pill(todo)
@@ -13,7 +13,7 @@
           - else
             (removed)
 
-      %span.title-item.action-name
+      %span.title-item.action-name{ data: { qa_selector: "todo_action_name_content" } }
         = todo_action_name(todo)
 
       %span.title-item.todo-label.todo-target-link
@@ -22,7 +22,7 @@
         - else
           = _("(removed)")
 
-      %span.title-item.todo-target-title
+      %span.title-item.todo-target-title{ data: { qa_selector: "todo_target_title_content" } }
         = todo_target_title(todo)
 
       %span.title-item.todo-project.todo-label

app/views/dashboard/todos/index.html.haml

@@ -83,7 +83,7 @@
 
 .todos-list-container.js-todos-all
   - if @todos.any?
-    .js-todos-list-container
+    .js-todos-list-container{ data: { qa_selector: "todos_list_container" } }
       .js-todos-options{ data: { per_page: @todos.limit_value, current_page: @todos.current_page, total_pages: @todos.total_pages } }
         .card.card-without-border.card-without-margin
           %ul.content-list.todos-list

qa/qa.rb

@@ -18,6 +18,7 @@ module QA
     autoload :Project, 'qa/flow/project'
     autoload :Saml, 'qa/flow/saml'
     autoload :User, 'qa/flow/user'
+    autoload :MergeRequest, 'qa/flow/merge_request'
   end
 
   ##
@@ -191,6 +192,7 @@ module QA
       autoload :Projects, 'qa/page/dashboard/projects'
       autoload :Groups, 'qa/page/dashboard/groups'
       autoload :Welcome, 'qa/page/dashboard/welcome'
+      autoload :Todos, 'qa/page/dashboard/todos'
 
       module Snippet
         autoload :New, 'qa/page/dashboard/snippet/new'

qa/qa/flow/login.rb

@@ -23,6 +23,7 @@ module QA
       end
 
       def sign_in(as: nil, address: :gitlab, skip_page_validation: false)
+        Page::Main::Menu.perform(&:sign_out) if Page::Main::Menu.perform(&:signed_in?)
         Runtime::Browser.visit(address, Page::Main::Login)
         Page::Main::Login.perform { |login| login.sign_in_using_credentials(user: as, skip_page_validation: skip_page_validation) }
       end

qa/qa/flow/merge_request.rb

+# frozen_string_literal: true
+
+module QA
+  module Flow
+    module MergeRequest
+      module_function
+
+      def enable_merge_trains
+        Page::Project::Menu.perform(&:go_to_general_settings)
+        Page::Project::Settings::Main.perform(&:expand_merge_requests_settings)
+        Page::Project::Settings::MergeRequest.perform(&:enable_merge_train)
+      end
+    end
+  end
+end

qa/qa/page/dashboard/todos.rb

+# frozen_string_literal: true
+
+module QA
+  module Page
+    module Dashboard
+      class Todos < Page::Base
+        include Page::Component::Snippet
+
+        view 'app/views/dashboard/todos/index.html.haml' do
+          element :todos_list_container, required: true
+        end
+
+        view 'app/views/dashboard/todos/_todo.html.haml' do
+          element :todo_item_container
+          element :todo_action_name_content
+          element :todo_target_title_content
+        end
+
+        def has_todo_list?
+          has_element? :todo_item_container
+        end
+
+        def has_latest_todo_item_with_content?(action, title)
+          within_element(:todos_list_container) do
+            within_element_by_index(:todo_item_container, 0) do
+              has_element?(:todo_action_name_content, text: action) && has_element?(:todo_target_title_content, text: title)
+            end
+          end
+        end
+      end
+    end
+  end
+end

qa/qa/specs/features/ee/browser_ui/4_verify/system_cancels_merge_request_in_merge_trains_spec.rb

+# frozen_string_literal: true
+
+require 'faker'
+
+module QA
+  RSpec.describe 'Verify' do
+    describe 'Merge train', :runner do
+      let(:file_name) { 'custom_file.txt' }
+      let(:mr_title) { Faker::Lorem.sentence }
+      let(:executor) { "qa-runner-#{Faker::Alphanumeric.alphanumeric(8)}" }
+
+      let(:project) do
+        Resource::Project.fabricate_via_api! do |project|
+          project.name = 'pipeline-for-merge-train'
+        end
+      end
+
+      let!(:runner) do
+        Resource::Runner.fabricate_via_api! do |runner|
+          runner.project = project
+          runner.name = executor
+          runner.tags = [executor]
+        end
+      end
+
+      let!(:ci_file) do
+        Resource::Repository::Commit.fabricate_via_api! do |commit|
+          commit.project = project
+          commit.commit_message = 'Add .gitlab-ci.yml'
+          commit.add_files(
+            [
+                {
+                    file_path: '.gitlab-ci.yml',
+                    content: <<~YAML
+                      test_merge_train:
+                        tags:
+                          - #{executor}
+                        script:
+                          - sleep 3
+                          - echo 'OK!'
+                        only:
+                          - merge_requests
+                    YAML
+                }
+            ]
+          )
+        end
+      end
+
+      let(:user) { Resource::User.fabricate_via_api! }
+      let(:user_api_client) { Runtime::API::Client.new(:gitlab, user: user) }
+
+      let(:merge_request) do
+        Resource::MergeRequest.fabricate_via_api! do |merge_request|
+          merge_request.api_client = user_api_client
+          merge_request.title = mr_title
+          merge_request.project = project
+          merge_request.description = Faker::Lorem.sentence
+          merge_request.target_new_branch = false
+          merge_request.file_name = file_name
+          merge_request.file_content = Faker::Lorem.sentence
+        end
+      end
+
+      before do
+        Flow::Login.sign_in
+        project.visit!
+        Flow::MergeRequest.enable_merge_trains
+        project.add_member(user, Resource::Members::AccessLevel::MAINTAINER)
+
+        create_user_personal_access_token
+        Flow::Login.sign_in(as: user)
+        merge_request.visit!
+
+        Page::MergeRequest::Show.perform do |show|
+          show.has_pipeline_status?('passed')
+          show.try_to_merge!
+
+          show.wait_until(reload: false) { show.has_content? 'started a merge train' }
+        end
+      end
+
+      after do
+        runner.remove_via_api!
+        user.remove_via_api!
+      end
+
+      context 'when system cancels a merge request' do
+        it 'creates a TODO task', testcase: 'https://gitlab.com/gitlab-org/quality/testcases/-/issues/927' do
+          # Create a merge conflict
+          Resource::Repository::Commit.fabricate_via_api! do |commit|
+            commit.api_client = user_api_client
+            commit.project = project
+            commit.commit_message = 'changing text file'
+            commit.add_files(
+              [
+                  {
+                      file_path: file_name,
+                      content: Faker::Lorem.sentence
+                  }
+              ]
+            )
+          end
+
+          Page::MergeRequest::Show.perform do |show|
+            show.wait_until(max_duration: 90, reload: false) { show.has_content?('removed this merge request from the merge train') }
+          end
+
+          Page::Main::Menu.perform do |main|
+            main.go_to_page_by_shortcut(:todos_shortcut_button)
+          end
+
+          Page::Dashboard::Todos.perform do |todos|
+            todos.wait_until(reload: true, sleep_interval: 1) { todos.has_todo_list? }
+
+            expect(todos).to have_latest_todo_item_with_content("Removed from Merge Train:", "#{mr_title}")
+          end
+        end
+      end
+
+      private
+
+      def create_user_personal_access_token
+        user_api_client.personal_access_token
+      end
+    end
+  end
+end