Support alternate sign in error message when email record does not exist

config/locales/en.yml

@@ -19,6 +19,7 @@ en:
       unconfirmed: 'You have to confirm your account before continuing.'
       locked: 'Your account is locked.'
       invalid: 'Invalid email or password.'
+      invalid_email: 'Invalid email or password.'
       invalid_token: 'Invalid authentication token.'
       timeout: 'Your session expired, please sign in again to continue.'
       inactive: 'Your account was not activated yet.'

lib/devise/strategies/database_authenticatable.rb

@@ -6,7 +6,7 @@ module Strategies
     class DatabaseAuthenticatable < Authenticatable
       def authenticate!
         resource = valid_password? && mapping.to.find_for_database_authentication(authentication_hash)
-        return fail(:invalid) unless resource
+        return fail(:invalid_email) unless resource
 
         if validate(resource){ resource.valid_password?(password) }
           resource.after_database_authentication

test/integration/database_authenticatable_test.rb

@@ -53,12 +53,14 @@ class DatabaseAuthenticationTest < ActionController::IntegrationTest
   end
 
   test 'sign in with invalid email should return to sign in form with error message' do
-    sign_in_as_admin do
-      fill_in 'email', :with => 'wrongemail@test.com'
-    end
+    store_translations :en, :devise => { :failure => { :admin => { :invalid_email => 'Invalid email address' } } } do
+      sign_in_as_admin do
+        fill_in 'email', :with => 'wrongemail@test.com'
+      end
 
-    assert_contain 'Invalid email or password'
-    assert_not warden.authenticated?(:admin)
+      assert_contain 'Invalid email address'
+      assert_not warden.authenticated?(:admin)
+    end
   end
 
   test 'sign in with invalid pasword should return to sign in form with error message' do