Merge pull request #19 from EvgeniyShelest/inherit_defaults

Inherit defaults

lib/sendwithus_ruby_action_mailer/base.rb

@@ -60,6 +60,11 @@ def default(value = nil)
         @defaults = defaults.merge(value)
       end
 
+      # Inherit defaults from ancestor
+      def inherited(heir)
+        heir.__send__(:default, defaults)
+      end
+
       # Return the mailer methods that are defined in any instance
       # of <tt>SendWithUsMailer::Base</tt>. There should not be
       # any reason to call this directly.

test/lib/sendwithus_ruby_action_mailer/integration_test.rb

@@ -47,13 +47,22 @@ def example_email
 
   describe "using default to set a parameter" do
     class MailerWithDefault < SendWithUsMailer::Base
-      default email_id: 'def-4bBEddKbhKBu5xsU2p58KX'
+      default email_id: 'def-4bBEddKbhKBu5xsU2p58KX',
+              from_address: 'from@mailer_with_default.com',
+              reply_to: 'reply_to@mailer_with_default.com'
 
       def send_an_email
         mail recipient_address: '[email protected]'
       end
     end
 
+    class InheritDefaultsMailer < MailerWithDefault
+    end
+
+    class ReplacedDefaultsMailer < MailerWithDefault
+      default from_address: 'from@replaced_defaults_mailer.com'
+    end
+
     it "sets the email_id" do
       mail = MailerWithDefault.send_an_email
       mail.email_id.must_equal 'def-4bBEddKbhKBu5xsU2p58KX'
@@ -63,6 +72,19 @@ def send_an_email
       mail = MailerWithDefault.send_an_email
       mail.to[:address].must_equal '[email protected]'
     end
+
+    it "inherits defaults from ancestor" do
+      InheritDefaultsMailer.defaults[:from_address].must_equal 'from@mailer_with_default.com'
+      InheritDefaultsMailer.defaults[:reply_to].must_equal 'reply_to@mailer_with_default.com'
+    end
+
+    it "replaces ancestor defaults by own" do
+      ReplacedDefaultsMailer.defaults[:from_address].must_equal 'from@replaced_defaults_mailer.com'
+    end
+
+    it "uses ancestors defaults that has not been replaced by own" do
+      ReplacedDefaultsMailer.defaults[:reply_to].must_equal 'reply_to@mailer_with_default.com'
+    end
   end
 
   describe "all parameters can be set by default" do