Adjust delivery method to work with array values for from and to

Author: benedikt

lib/userlist/delivery_method.rb

@@ -1,6 +1,5 @@
 class Userlist::DeliveryMethod
-  attr_reader :userlist
-  attr_reader :settings
+  attr_reader :userlist, :settings
 
   def initialize(settings = {})
     @settings = settings
@@ -26,7 +25,7 @@ def serialize(mail)
   end
 
   def serialize_address(address)
-    address.first.to_s
+    Array(address).map(&:to_s)
   end
 
   def serialize_body(body)

spec/userlist/delivery_method_spec.rb

@@ -27,8 +27,8 @@
 
       it 'delivers the message correctly' do
         expected_payload = {
-          to: 'user@example.com',
-          from: 'sender@example.com',
+          to: ['user@example.com'],
+          from: ['sender@example.com'],
           subject: 'Test Subject',
           body: { type: :text, content: 'Hello world' },
           theme: nil
@@ -55,8 +55,8 @@
 
       it 'delivers the message correctly' do
         expected_payload = {
-          to: 'user@example.com',
-          from: 'sender@example.com',
+          to: ['user@example.com'],
+          from: ['sender@example.com'],
           subject: 'Test Subject',
           body: { type: :html, content: '<p>Hello world</p>' },
           theme: nil
@@ -87,8 +87,8 @@
 
       it 'delivers the message correctly' do
         expected_payload = {
-          to: 'user@example.com',
-          from: 'sender@example.com',
+          to: ['user@example.com'],
+          from: ['sender@example.com'],
           subject: 'Test Subject',
           body: {
             type: :multipart,