Add basic e2e test for codeowners display in file blob

The test pushes a CODEOWNERS file and some test files to a repo
and checks that each file displays the appropriate code owners.

Includes changes to page objects and addition of selectors to views

ee/app/views/projects/blob/_owners.html.haml

 - return if blob.owners.empty?
 
-.well-segment.blob-auxiliary-viewer.file-owner-content
+.well-segment.blob-auxiliary-viewer.file-owner-content.qa-file-owner-content
   = sprite_icon('users', size: 18, css_class: 'icon')
   %strong
     = _("Code owners")
   = link_to icon('question-circle'), help_page_path('user/project/code_owners'), title: 'About this feature', target: '_blank'
   :
-  = users_sentence(blob.owners, link_class: 'file-owner-link')
+  = users_sentence(blob.owners, link_class: 'file-owner-link qa-link-file-owner')

qa/qa/ee.rb

@@ -23,6 +23,10 @@ module QA
         end
       end
 
+      module File
+        autoload :Show, 'qa/ee/page/file/show'
+      end
+
       module Main
         autoload :Banner, 'qa/ee/page/main/banner'
       end

qa/qa/ee/page/file/show.rb

+# frozen_string_literal: true
+
+module QA
+  module EE
+    module Page
+      module File
+        module Show
+          def self.prepended(page)
+            page.module_eval do
+              view 'ee/app/views/projects/blob/_owners.html.haml' do
+                element :file_owner_content
+                element :link_file_owner
+              end
+            end
+          end
+        end
+      end
+    end
+  end
+end

qa/qa/factory/repository/push.rb

@@ -31,7 +31,9 @@ module QA
         end
 
         def files=(files)
-          if !files.is_a?(Array) || files.empty?
+          if !files.is_a?(Array) ||
+              files.empty? ||
+              files.any? { |file| !file.has_key?(:name) || !file.has_key?(:content) }
             raise ArgumentError, "Please provide an array of hashes e.g.: [{name: 'file1', content: 'foo'}]"
           end
 

qa/qa/page/file/show.rb

@@ -2,6 +2,8 @@ module QA
   module Page
     module File
       class Show < Page::Base
+        prepend QA::EE::Page::File::Show
+
         include Shared::CommitMessage
 
         view 'app/helpers/blob_helper.rb' do

qa/qa/specs/features/browser_ui/3_create/repository/ee_code_owners_spec.rb

+# frozen_string_literal: true
+
+module QA
+  context 'Create' do
+    describe 'Codeowners' do
+      let(:files) do
+        [
+          {
+            name: 'file.txt',
+            content: 'foo'
+          },
+          {
+            name: 'README.md',
+            content: 'bar'
+          }
+        ]
+      end
+
+      before do
+        # Add two new users to a project as members
+        Runtime::Browser.visit(:gitlab, Page::Main::Login)
+
+        @user = Factory::Resource::User.fabricate!
+        @user2 = Factory::Resource::User.fabricate!
+
+        Page::Main::Menu.perform { |menu| menu.sign_out }
+        Page::Main::Login.perform { |login_page| login_page.sign_in_using_credentials }
+
+        @project = Factory::Resource::Project.fabricate! do |project|
+          project.name = "codeowners"
+        end
+        @project.visit!
+
+        Page::Project::Menu.perform { |menu| menu.click_members_settings }
+        Page::Project::Settings::Members.perform do |members_page|
+          members_page.add_member(@user.username)
+          members_page.add_member(@user2.username)
+        end
+      end
+
+      it 'displays owners specified in CODEOWNERS file' do
+        codeowners_file_content =
+          <<-CONTENT
+            * @#{@user2.username}
+            *.txt @#{@user.username}
+          CONTENT
+        files << {
+          name: 'CODEOWNERS',
+          content: codeowners_file_content
+        }
+
+        # Push CODEOWNERS and test files to the project
+        Factory::Repository::ProjectPush.fabricate! do |push|
+          push.project = @project
+          push.files = files
+          push.commit_message = 'Add CODEOWNERS and test files'
+        end
+        Page::Project::Show.perform do |project_page|
+          project_page.wait_for_push
+        end
+
+        # Check the files and code owners
+        Page::Project::Show.perform do |project_page|
+          project_page.go_to_file 'file.txt'
+        end
+
+        expect(page).to have_content(@user.name)
+        expect(page).not_to have_content(@user2.name)
+
+        @project.visit!
+        Page::Project::Show.perform do |project_page|
+          project_page.go_to_file 'README.md'
+        end
+
+        expect(page).to have_content(@user2.name)
+        expect(page).not_to have_content(@user.name)
+      end
+    end
+  end
+end

qa/spec/factory/repository/push_spec.rb

@@ -19,7 +19,11 @@ describe QA::Factory::Repository::Push do
       expect { subject.files = [] }.to raise_error(ArgumentError)
     end
 
-    it 'does not raise if files is an array' do
+    it 'raises an error if files is not an array of hashes with :name and :content keys' do
+      expect { subject.files = [{ foo: 'foo' }] }.to raise_error(ArgumentError)
+    end
+
+    it 'does not raise if files is an array of hashes with :name and :content keys' do
       expect { subject.files = files }.not_to raise_error
     end
   end