Expose `mailbox_for` method

Currently, the only exposed entry point into the ApplicationMailbox's configured
routing system is to call `route`, which performs a lot of work to fully
`process` inbound email. It'd be nice to have a way (e.g. in test) of checking
which mailbox an email would route to without necessarily processing it yet.

2 files changed, 9 insertions, 5 deletions

diff --git a/actionmailbox/lib/action_mailbox/router.rb b/actionmailbox/lib/action_mailbox/router.rb
index 71370e409d..54982eae21 100644
--- a/actionmailbox/lib/action_mailbox/router.rb
+++ b/actionmailbox/lib/action_mailbox/router.rb
@@ -21,7 +21,7 @@ module ActionMailbox
     end
 
     def route(inbound_email)
-      if mailbox = match_to_mailbox(inbound_email)
+      if mailbox = mailbox_for(inbound_email)
         mailbox.receive(inbound_email)
       else
         inbound_email.bounced!
@@ -30,12 +30,12 @@ module ActionMailbox
       end
     end
 
+    def mailbox_for(inbound_email)
+      routes.detect { |route| route.match?(inbound_email) }.try(:mailbox_class)
+    end
+
     private
       attr_reader :routes
-
-      def match_to_mailbox(inbound_email)
-        routes.detect { |route| route.match?(inbound_email) }.try(:mailbox_class)
-      end
   end
 end
 
diff --git a/actionmailbox/lib/action_mailbox/routing.rb b/actionmailbox/lib/action_mailbox/routing.rb
index 58462a44c6..6d9ca62d79 100644
--- a/actionmailbox/lib/action_mailbox/routing.rb
+++ b/actionmailbox/lib/action_mailbox/routing.rb
@@ -17,6 +17,10 @@ module ActionMailbox
       def route(inbound_email)
         router.route(inbound_email)
       end
+
+      def mailbox_for(inbound_email)
+        router.route(inbound_email)
+      end
     end
   end
 end