refactor: move senders in to app/senders/

spec/lib/message_dequeuer/state_spec.rb

@@ -9,7 +9,7 @@ module MessageDequeuer
 
     describe "#send_result" do
       it "can be get and set" do
-        result = instance_double(Postal::SendResult)
+        result = instance_double(SendResult)
         state.send_result = result
         expect(state.send_result).to be result
       end
@@ -17,20 +17,20 @@ module MessageDequeuer
 
     describe "#sender_for" do
       it "returns a instance of the given sender initialized with the args" do
-        sender = state.sender_for(Postal::HTTPSender, "1234")
-        expect(sender).to be_a Postal::HTTPSender
+        sender = state.sender_for(HTTPSender, "1234")
+        expect(sender).to be_a HTTPSender
       end
 
       it "returns a cached sender on subsequent calls" do
-        sender = state.sender_for(Postal::HTTPSender, "1234")
-        expect(state.sender_for(Postal::HTTPSender, "1234")).to be sender
+        sender = state.sender_for(HTTPSender, "1234")
+        expect(state.sender_for(HTTPSender, "1234")).to be sender
       end
     end
 
     describe "#finished" do
       it "calls finish on all cached senders" do
-        sender1 = state.sender_for(Postal::HTTPSender, "1234")
-        sender2 = state.sender_for(Postal::HTTPSender, "4444")
+        sender1 = state.sender_for(HTTPSender, "1234")
+        sender2 = state.sender_for(HTTPSender, "4444")
         expect(sender1).to receive(:finish)
         expect(sender2).to receive(:finish)