From 767d60156b89382326ce42f3ddca0cb860d38149 Mon Sep 17 00:00:00 2001
From: Yves Senn <yves.senn@gmail.com>
Date: Mon, 27 Apr 2015 10:15:52 +0200
Subject: mailer previews for `NullMail` instances. Closes #19849.

---
 actionmailer/lib/action_mailer/base.rb | 1 +
 1 file changed, 1 insertion(+)

(limited to 'actionmailer/lib')

diff --git a/actionmailer/lib/action_mailer/base.rb b/actionmailer/lib/action_mailer/base.rb
index 754f698e48..218b7a735a 100644
--- a/actionmailer/lib/action_mailer/base.rb
+++ b/actionmailer/lib/action_mailer/base.rb
@@ -596,6 +596,7 @@ module ActionMailer
 
     class NullMail #:nodoc:
       def body; '' end
+      def header; {} end
 
       def respond_to?(string, include_all=false)
         true
-- 
cgit v1.2.3