Add tests for plain diff/email patch options

Add spec file using before(:context) to reduce test time. With testing
almost identical things, unnecessary to make them completely atomic.
Includes two helper methods. Since the raw_content method is the only
function needed on that page, created the method in the spec instead
of adding another page object.

Setup new project/commit page object and update project/show to add
go_to_commit method. The go_to_commit method is near duplicate of
go_to_file method, but decided to split them off to reduce overall
refactoring and simplify language.

Also add selectors to commit box partial and update qa.rb to load
new page object.

app/views/projects/commit/_commit_box.html.haml

@@ -28,7 +28,7 @@
     = link_to project_tree_path(@project, @commit), class: "btn btn-default append-right-10 d-none d-sm-none d-md-inline" do
       #{ _('Browse files') }
     .dropdown.inline
-      %a.btn.btn-default.dropdown-toggle{ data: { toggle: "dropdown" } }
+      %a.btn.btn-default.dropdown-toggle.qa-options-button{ data: { toggle: "dropdown" } }
         %span= _('Options')
         = icon('caret-down')
       %ul.dropdown-menu.dropdown-menu-right
@@ -48,8 +48,8 @@
         %li.dropdown-header
           #{ _('Download') }
         - unless @commit.parents.length > 1
-          %li= link_to s_("DownloadCommit|Email Patches"), project_commit_path(@project, @commit, format: :patch)
-        %li= link_to s_("DownloadCommit|Plain Diff"),    project_commit_path(@project, @commit, format: :diff)
+          %li= link_to s_("DownloadCommit|Email Patches"), project_commit_path(@project, @commit, format: :patch), class: "qa-email-patches"
+        %li= link_to s_("DownloadCommit|Plain Diff"),    project_commit_path(@project, @commit, format: :diff), class: "qa-plain-diff"
 
 .commit-box{ data: { project_path: project_path(@project) } }
   %h3.commit-title

qa/qa.rb

@@ -158,6 +158,10 @@ module QA
       autoload :Activity, 'qa/page/project/activity'
       autoload :Menu, 'qa/page/project/menu'
 
+      module Commit
+        autoload :Show, 'qa/page/project/commit/show'
+      end
+
       module Import
         autoload :Github, 'qa/page/project/import/github'
       end

qa/qa/page/project/commit/show.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module QA
+  module Page
+    module Project
+      module Commit
+        class Show < Page::Base
+          view 'app/views/projects/commit/_commit_box.html.haml' do
+            element :options_button
+            element :email_patches
+            element :plain_diff
+          end
+
+          def select_email_patches
+            click_element :options_button
+            click_element :email_patches
+          end
+
+          def select_plain_diff
+            click_element :options_button
+            click_element :plain_diff
+          end
+        end
+      end
+    end
+  end
+end

qa/qa/page/project/show.rb

@@ -72,9 +72,14 @@ module QA
           end
         end
 
+        def go_to_commit(commit_msg)
+          within_element(:file_tree) do
+            click_on commit_msg
+          end
+        end
+
         def go_to_new_issue
           click_element :new_menu_toggle
-
           click_link 'New issue'
         end
 

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

@@ -0,0 +1,61 @@
+# frozen_string_literal: true
+
+module QA
+  context 'Create' do
+    describe 'Commit data' do
+      before(:context) do
+        Runtime::Browser.visit(:gitlab, Page::Main::Login)
+        Page::Main::Login.perform(&:sign_in_using_credentials)
+
+        @project = Resource::Repository::ProjectPush.fabricate! do |push|
+          push.file_name = 'README.md'
+          push.file_content = '# This is a test project'
+          push.commit_message = 'Add README.md'
+        end
+
+        # first file added has no parent commit, thus no diff data
+        # add second file to repo to enable diff from initial commit
+        @commit_message = 'Add second file'
+
+        @project.visit!
+        Page::Project::Show.perform(&:create_new_file!)
+        Page::File::Form.perform do |f|
+          f.add_name('second')
+          f.add_content('second file content')
+          f.add_commit_message(@commit_message)
+          f.commit_changes
+        end
+      end
+
+      def view_commit
+        @project.visit!
+        Page::Project::Show.perform do |page|
+          page.go_to_commit(@commit_message)
+        end
+      end
+
+      def raw_content
+        find('pre').text
+      end
+
+      it 'user views raw email patch' do
+        view_commit
+
+        Page::Project::Commit::Show.perform(&:select_email_patches)
+
+        expect(page).to have_content('From: Administrator <admin@example.com>')
+        expect(page).to have_content('Subject: [PATCH] Add second file')
+        expect(page).to have_content('diff --git a/second b/second')
+      end
+
+      it 'user views raw commit diff' do
+        view_commit
+
+        Page::Project::Commit::Show.perform(&:select_plain_diff)
+
+        expect(raw_content).to start_with('diff --git a/second b/second')
+        expect(page).to have_content('+second file content')
+      end
+    end
+  end
+end