add activerecord tests for deprecation of %s and %d in error messages…

… (and translations in general)

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>

activerecord/test/cases/validations_i18n_test.rb

@@ -40,6 +40,18 @@ def test_default_error_messages_is_deprecated
     end
   end
 
+  def test_percent_s_interpolation_syntax_in_error_messages_is_deprecated
+    assert_deprecated('using %s in messages') do
+      I18n.t :does_not_exist, :default => "%s interpolation syntax is deprected", :value => 'this'
+    end
+  end
+
+  def test_percent_d_interpolation_syntax_in_error_messages_is_deprecated
+    assert_deprecated('using %d in messages') do
+      I18n.t :does_not_exist, :default => "%d interpolation syntax is deprected", :count => 1
+    end
+  end
+
   # ActiveRecord::Errors
   uses_mocha 'ActiveRecord::Errors' do