Clear ActionMailer deliveries on setup and teardown

Signed-off-by: NJeremy Daer <jeremydaer@gmail.com>

actionmailer/lib/action_mailer/test_case.rb

@@ -15,10 +15,12 @@ module ClearTestDeliveries
       extend ActiveSupport::Concern
 
       included do
+        setup :clear_test_deliveries
         teardown :clear_test_deliveries
       end
 
       private
+
       def clear_test_deliveries
         if ActionMailer::Base.delivery_method == :test
           ActionMailer::Base.deliveries.clear
@@ -76,6 +78,7 @@ def initialize_test_deliveries # :nodoc:
           set_delivery_method :test
           @old_perform_deliveries = ActionMailer::Base.perform_deliveries
           ActionMailer::Base.perform_deliveries = true
+          ActionMailer::Base.deliveries.clear
         end
 
         def restore_test_deliveries # :nodoc:
@@ -89,6 +92,7 @@ def set_delivery_method(method) # :nodoc:
         end
 
         def restore_delivery_method # :nodoc:
+          ActionMailer::Base.deliveries.clear
           ActionMailer::Base.delivery_method = @old_delivery_method
         end
 
@@ -114,6 +118,5 @@ def read_fixture(action)
     end
 
     include Behavior
-    include ClearTestDeliveries
   end
 end

actionmailer/test/test_case_test.rb

@@ -3,6 +3,44 @@
 class TestTestMailer < ActionMailer::Base
 end
 
+class ClearTestDeliveriesMixinTest < ActiveSupport::TestCase
+  include ActionMailer::TestCase::ClearTestDeliveries
+
+  def before_setup
+    ActionMailer::Base.delivery_method, @original_delivery_method = :test, ActionMailer::Base.delivery_method
+    ActionMailer::Base.deliveries << 'better clear me, setup'
+    super
+  end
+
+  def after_teardown
+    super
+    assert_equal [], ActionMailer::Base.deliveries
+    ActionMailer::Base.delivery_method = @original_delivery_method
+  end
+
+  def test_deliveries_are_cleared_on_setup_and_teardown
+    assert_equal [], ActionMailer::Base.deliveries
+    ActionMailer::Base.deliveries << 'better clear me, teardown'
+  end
+end
+
+class MailerDeliveriesClearingTest < ActionMailer::TestCase
+  def before_setup
+    ActionMailer::Base.deliveries << 'better clear me, setup'
+    super
+  end
+
+  def after_teardown
+    super
+    assert_equal [], ActionMailer::Base.deliveries
+  end
+
+  def test_deliveries_are_cleared_on_setup_and_teardown
+    assert_equal [], ActionMailer::Base.deliveries
+    ActionMailer::Base.deliveries << 'better clear me, teardown'
+  end
+end
+
 class CrazyNameMailerTest < ActionMailer::TestCase
   tests TestTestMailer