Set minimum password length for edit and new views (#4068)

* Set minimum password length for edit and new views

* Update edit.html.erb

* Update registerable_test.rb

app/controllers/devise/registrations_controller.rb

@@ -1,11 +1,11 @@
 class Devise::RegistrationsController < DeviseController
   prepend_before_action :require_no_authentication, only: [:new, :create, :cancel]
   prepend_before_action :authenticate_scope!, only: [:edit, :update, :destroy]
+  prepend_before_action :set_minimum_password_length, only: [:new, :edit]
 
   # GET /resource/sign_up
   def new
     build_resource({})
-    set_minimum_password_length
     yield resource if block_given?
     respond_with self.resource
   end

app/views/devise/registrations/edit.html.erb

@@ -15,6 +15,10 @@
   <div class="field">
     <%= f.label :password %> <i>(leave blank if you don't want to change it)</i><br />
     <%= f.password_field :password, autocomplete: "off" %>
+    <% if @minimum_password_length %>
+      <br />
+      <em><%= @minimum_password_length %> characters minimum</em>
+    <% end %>
   </div>
 
   <div class="field">

test/integration/registerable_test.rb

@@ -219,6 +219,12 @@ class RegistrationTest < Devise::IntegrationTest
     assert_contain "Password confirmation doesn't match Password"
     refute User.to_adapter.find_first.valid_password?('pas123')
   end
+  
+  test 'a signed in user should see a warning about minimum password length' do
+    sign_in_as_user
+    get edit_user_registration_path
+    assert_contain 'characters minimum'
+  end
 
   test 'a signed in user should be able to cancel their account' do
     sign_in_as_user