FEATURE: retry processing incoming emails on rate limit

spec/components/email/processor_spec.rb

@@ -0,0 +1,27 @@
+require "rails_helper"
+require "email/processor"
+
+describe Email::Processor do
+
+  describe "rate limits" do
+
+    let(:mail) { "From: foo@bar.com\nTo: bar@foo.com\nSubject: FOO BAR\n\nFoo foo bar bar?" }
+    let(:limit_exceeded) { RateLimiter::LimitExceeded.new(10) }
+
+    before do
+      Email::Receiver.any_instance.expects(:process!).raises(limit_exceeded)
+    end
+
+    it "enqueues a background job by default" do
+      Jobs.expects(:enqueue).with(:process_email, mail: mail)
+      Email::Processor.process!(mail)
+    end
+
+    it "doesn't enqueue a background job when retry is disabled" do
+      Jobs.expects(:enqueue).with(:process_email, mail: mail).never
+      expect { Email::Processor.process!(mail, false) }.to raise_error(limit_exceeded)
+    end
+
+  end
+
+end

spec/jobs/process_email_spec.rb

@@ -0,0 +1,12 @@
+require "rails_helper"
+
+describe Jobs::ProcessEmail do
+
+  let(:mail) { "From: foo@bar.com\nTo: bar@foo.com\nSubject: FOO BAR\n\nFoo foo bar bar?" }
+
+  it "process an email without retry" do
+    Email::Processor.expects(:process!).with(mail, false)
+    Jobs::ProcessEmail.new.execute(mail: mail)
+  end
+
+end