Make custom error work with full_error component

lib/simple_form/components/errors.rb

@@ -40,7 +40,7 @@ module SimpleForm
       end
 
       def full_errors_on_attribute
-        object.errors.full_messages_for(attribute_name)
+        has_error_in_options? ? [options[:error]] : object.errors.full_messages_for(attribute_name)
       end
 
       def errors_on_association

test/form_builder/error_test.rb

@@ -145,4 +145,13 @@ class ErrorTest < ActionView::TestCase
 
     assert_select 'span.error', "#{error_text}"
   end
+
+  test 'input with custom error works when using full_error component' do
+    swap_wrapper :default, self.custom_wrapper_with_full_error do
+      error_text = "Super User Name! can't be blank"
+      with_custom_error_for(@user, :name, error: error_text)
+
+      assert_select 'span.error', "#{error_text}"
+    end
+  end
 end