Pubsub confirmation worker spec (#2974)

* Add specs for valid challenge response from pubsub confirmation worker

* Refactor the pubsub confirmation worker

1 files changed, 88 insertions, 0 deletions

diff --git a/spec/workers/pubsubhubbub/confirmation_worker_spec.rb b/spec/workers/pubsubhubbub/confirmation_worker_spec.rb
new file mode 100644
index 000000000..3951c1a50
--- /dev/null
+++ b/spec/workers/pubsubhubbub/confirmation_worker_spec.rb
@@ -0,0 +1,88 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe Pubsubhubbub::ConfirmationWorker do
+  include RoutingHelper
+
+  subject { described_class.new }
+
+  let!(:alice) { Fabricate(:account, username: 'alice') }
+  let!(:subscription) { Fabricate(:subscription, account_id: alice.id, callback_url: 'http://example.com/api', confirmed: false, expires_at: 3.days.from_now, secret: nil) }
+
+  describe 'perform' do
+    describe 'with subscribe mode' do
+      it 'confirms and updates subscription when challenge matches' do
+        stub_random_value
+        stub_request(:get, url_for_mode('subscribe'))
+          .with(headers: http_headers)
+          .to_return(status: 200, body: challenge_value, headers: {})
+
+        seconds = 10.days.seconds.to_i
+        subject.perform(subscription.id, 'subscribe', 'asdf', seconds)
+
+        subscription.reload
+        expect(subscription.secret).to eq 'asdf'
+        expect(subscription.confirmed).to eq true
+        expect(subscription.expires_at).to be_within(5).of(10.days.from_now)
+      end
+
+      it 'does not update subscription when challenge does not match' do
+        stub_random_value
+        stub_request(:get, url_for_mode('subscribe'))
+          .with(headers: http_headers)
+          .to_return(status: 200, body: 'wrong value', headers: {})
+
+        seconds = 10.days.seconds.to_i
+        subject.perform(subscription.id, 'subscribe', 'asdf', seconds)
+
+        subscription.reload
+        expect(subscription.secret).to be_blank
+        expect(subscription.confirmed).to eq false
+        expect(subscription.expires_at).to be_within(5).of(3.days.from_now)
+      end
+    end
+
+    describe 'with unsubscribe mode' do
+      it 'confirms and destroys subscription when challenge matches' do
+        stub_random_value
+        stub_request(:get, url_for_mode('unsubscribe'))
+          .with(headers: http_headers)
+          .to_return(status: 200, body: challenge_value, headers: {})
+
+        seconds = 10.days.seconds.to_i
+        subject.perform(subscription.id, 'unsubscribe', 'asdf', seconds)
+
+        expect { subscription.reload }.to raise_error(ActiveRecord::RecordNotFound)
+      end
+
+      it 'does not destroy subscription when challenge does not match' do
+        stub_random_value
+        stub_request(:get, url_for_mode('unsubscribe'))
+          .with(headers: http_headers)
+          .to_return(status: 200, body: 'wrong value', headers: {})
+
+        seconds = 10.days.seconds.to_i
+        subject.perform(subscription.id, 'unsubscribe', 'asdf', seconds)
+
+        expect { subscription.reload }.not_to raise_error
+      end
+    end
+  end
+
+  def url_for_mode(mode)
+    "http://example.com/api?hub.challenge=#{challenge_value}&hub.lease_seconds=863999&hub.mode=#{mode}&hub.topic=https://#{Rails.configuration.x.local_domain}/users/alice.atom"
+  end
+
+  def stub_random_value
+    allow(SecureRandom).to receive(:hex).and_return(challenge_value)
+  end
+
+  def challenge_value
+    '1a2s3d4f'
+  end
+
+  def http_headers
+    { 'Connection' => 'close', 'Host' => 'example.com', 'User-Agent' => 'Mastodon/PubSubHubbub' }
+  end
+end