Add optional wait param for Drill::Mail::LetterOpener#deliver_later

lib/drill/mail/letter_opener.rb

@@ -21,12 +21,16 @@ def initialize(
       end
 
       def deliver
+        return if params.skip_delivery
+
         prepare_mail!
 
         delivery_method.deliver!(mail)
       end
 
-      alias_method :deliver_later, :deliver
+      def deliver_later(wait: nil)
+        deliver
+      end
 
       private
 

spec/drill/mail/letter_opener_spec.rb

@@ -12,12 +12,14 @@
       reply_to: '[email protected]',
       cc: '[email protected]',
       to: '[email protected]',
+      skip_delivery: skip_delivery,
       vars: {
         foo_bar: 'foo_bar',
         bar_foo: 'bar_foo'
       }
     )
   end
+  let(:skip_delivery) { false }
   let(:mail_double) { Mail.new }
   let(:delivery_method_double) do
     instance_double(LetterOpener::DeliveryMethod, deliver!: true)
@@ -92,5 +94,33 @@
       # TODO: implement this
       xit 'handles error'
     end
+
+    describe '#deliver_later' do
+      context "when 'skip_delivery' is true" do
+        let(:skip_delivery) { true }
+
+        it "doesn't call " do
+          expect(delivery_method_double).not_to receive(:deliver!)
+
+          mail.deliver_later
+        end
+      end
+
+      context 'when `wait` param is not present' do
+        it 'calls perform_async on worker' do
+          expect(mail).to receive(:deliver).and_call_original
+          expect(delivery_method_double).to receive(:deliver!)
+          mail.deliver_later
+        end
+      end
+
+      context 'when `wait` param is present' do
+        it 'calls perform_in on worker' do
+          expect(mail).to receive(:deliver).and_call_original
+          expect(delivery_method_double).to receive(:deliver!)
+          mail.deliver_later(wait: 10)
+        end
+      end
+    end
   end
 end