Retry registration 3 times before failing

Registration intermittently fails without an obvious cause.
The action to click the button seems to move focus to the right button
but nothing happens.
This change attempts to retry the action under the assumption that
Capybara or Chrome is misbehaving.
It also updates the selectors for the sign up page.

app/views/devise/shared/_signup_box.html.haml

@@ -5,22 +5,22 @@
         = devise_error_messages!
       .form-group
         = f.label :name, 'Full name', class: 'label-bold'
-        = f.text_field :name, class: "form-control top", required: true, title: "This field is required."
+        = f.text_field :name, class: "form-control top qa-new-user-name", required: true, title: "This field is required."
       .username.form-group
         = f.label :username, class: 'label-bold'
-        = f.text_field :username, class: "form-control middle", pattern: Gitlab::PathRegex::NAMESPACE_FORMAT_REGEX_JS, required: true, title: 'Please create a username with only alphanumeric characters.'
+        = f.text_field :username, class: "form-control middle qa-new-user-username", pattern: Gitlab::PathRegex::NAMESPACE_FORMAT_REGEX_JS, required: true, title: 'Please create a username with only alphanumeric characters.'
         %p.validation-error.hide Username is already taken.
         %p.validation-success.hide Username is available.
         %p.validation-pending.hide Checking username availability...
       .form-group
         = f.label :email, class: 'label-bold'
-        = f.email_field :email, class: "form-control middle", required: true, title: "Please provide a valid email address."
+        = f.email_field :email, class: "form-control middle qa-new-user-email", required: true, title: "Please provide a valid email address."
       .form-group
         = f.label :email_confirmation, class: 'label-bold'
-        = f.email_field :email_confirmation, class: "form-control middle", required: true, title: "Please retype the email address."
+        = f.email_field :email_confirmation, class: "form-control middle qa-new-user-email-confirmation", required: true, title: "Please retype the email address."
       .form-group.append-bottom-20#password-strength
         = f.label :password, class: 'label-bold'
-        = f.password_field :password, class: "form-control bottom", required: true, pattern: ".{#{@minimum_password_length},}", title: "Minimum length is #{@minimum_password_length} characters."
+        = f.password_field :password, class: "form-control bottom qa-new-user-password", required: true, pattern: ".{#{@minimum_password_length},}", title: "Minimum length is #{@minimum_password_length} characters."
         %p.gl-field-hint.text-secondary Minimum length is #{@minimum_password_length} characters
       - if Gitlab::CurrentSettings.current_application_settings.enforce_terms?
         .form-group
@@ -33,4 +33,4 @@
       - if Gitlab::Recaptcha.enabled?
         = recaptcha_tags
       .submit-container
-        = f.submit "Register", class: "btn-register btn"
+        = f.submit "Register", class: "btn-register btn qa-new-user-register-button"

qa/qa/page/base.rb

@@ -32,6 +32,21 @@ module QA
         false
       end
+      def with_retry(max_attempts: 3, reload: false)
+        attempts = 0
+
+        while attempts < max_attempts
+          result = yield
+          return result if result
+
+          refresh if reload
+
+          attempts += 1
+        end
+
+        false
+      end
+
       def scroll_to(selector, text: nil)
         page.execute_script <<~JS
           var elements = Array.from(document.querySelectorAll('#{selector}'));

qa/qa/page/main/menu.rb

@@ -68,10 +68,6 @@ module QA
           end
         end
-        def assert_has_personal_area
-          raise "Failed to sign in" unless has_personal_area?
-        end
-
         private
         def within_top_menu

qa/qa/page/main/sign_up.rb

+# frozen_string_literal: true
+
 module QA
   module Page
     module Main
       class SignUp < Page::Base
         view 'app/views/devise/shared/_signup_box.html.haml' do
-          element :name, 'text_field :name'
-          element :username, 'text_field :username'
-          element :email_field, 'email_field :email'
-          element :email_confirmation, 'email_field :email_confirmation'
-          element :password, 'password_field :password'
-          element :register_button, 'submit "Register"'
+          element :new_user_name
+          element :new_user_username
+          element :new_user_email
+          element :new_user_email_confirmation
+          element :new_user_password
+          element :new_user_register_button
         end
         def sign_up!(user)
-          fill_in :new_user_name, with: user.name
-          fill_in :new_user_username, with: user.username
-          fill_in :new_user_email, with: user.email
-          fill_in :new_user_email_confirmation, with: user.email
-          fill_in :new_user_password, with: user.password
-          click_button 'Register'
-          Page::Main::Menu.act { assert_has_personal_area }
+          fill_element :new_user_name, user.name
+          fill_element :new_user_username, user.username
+          fill_element :new_user_email, user.email
+          fill_element :new_user_email_confirmation, user.email
+          fill_element :new_user_password, user.password
+
+          signed_in = with_retry do
+            click_element :new_user_register_button
+
+            Page::Main::Menu.act { has_personal_area? }
+          end
+          raise "Failed to register and sign in" unless signed_in
         end
       end
     end