Backport #8450, the return value from mailer methods is not relevant.

Conflicts:

	actionmailer/CHANGELOG.md
	actionmailer/lib/action_mailer/base.rb

2 files changed, 11 insertions, 0 deletions

diff --git a/actionmailer/test/base_test.rb b/actionmailer/test/base_test.rb
index b69b26faf0..f648cb1546 100644
--- a/actionmailer/test/base_test.rb
+++ b/actionmailer/test/base_test.rb
@@ -477,6 +477,12 @@ class BaseTest < ActiveSupport::TestCase
     mail.deliver
   end
 
+  test 'the return value of mailer methods is not relevant' do
+    mail = BaseMailer.with_nil_as_return_value
+    assert_equal('Welcome', mail.body.to_s.strip)
+    mail.deliver
+  end
+
   # Before and After hooks
 
   class MyObserver
diff --git a/actionmailer/test/mailers/base_mailer.rb b/actionmailer/test/mailers/base_mailer.rb
index 8c4430b046..50438ead2a 100644
--- a/actionmailer/test/mailers/base_mailer.rb
+++ b/actionmailer/test/mailers/base_mailer.rb
@@ -118,4 +118,9 @@ class BaseMailer < ActionMailer::Base
 
   def without_mail_call
   end
+
+  def with_nil_as_return_value(hash = {})
+    mail(:template_name => "welcome")
+    nil
+  end
 end