Mastodon/spec/lib/activitypub/activity/announce_spec.rb

require 'rails_helper'

RSpec.describe ActivityPub::Activity::Announce do
  let(:sender)    { Fabricate(:account, followers_url: 'http://example.com/followers', uri: 'https://example.com/actor') }
  let(:recipient) { Fabricate(:account) }
  let(:status)    { Fabricate(:status, account: recipient) }

  let(:json) do
    {
      '@context': 'https://www.w3.org/ns/activitystreams',
      id: 'foo',
      type: 'Announce',
      actor: 'https://example.com/actor',
      object: object_json,
      to: 'http://example.com/followers',
    }.with_indifferent_access
  end

  let(:unknown_object_json) do
    {
      '@context': 'https://www.w3.org/ns/activitystreams',
      id: 'https://example.com/actor/hello-world',
      type: 'Note',
      attributedTo: 'https://example.com/actor',
      content: 'Hello world',
      to: 'http://example.com/followers',
    }
  end

  subject { described_class.new(json, sender) }

  describe '#perform' do
    context 'when sender is followed by a local account' do
      before do
        Fabricate(:account).follow!(sender)
        stub_request(:get, 'https://example.com/actor/hello-world').to_return(body: Oj.dump(unknown_object_json))
        subject.perform
      end

      context 'a known status' do
        let(:object_json) do
          ActivityPub::TagManager.instance.uri_for(status)
        end

        it 'creates a reblog by sender of status' do
          expect(sender.reblogged?(status)).to be true
        end
      end

      context 'an unknown status' do
        let(:object_json) { 'https://example.com/actor/hello-world' }

        it 'creates a reblog by sender of status' do
          reblog = sender.statuses.first

          expect(reblog).to_not be_nil
          expect(reblog.reblog.text).to eq 'Hello world'
        end
      end

      context 'self-boost of a previously unknown status with correct attributedTo' do
        let(:object_json) do
          {
            id: 'https://example.com/actor#bar',
            type: 'Note',
            content: 'Lorem ipsum',
            attributedTo: 'https://example.com/actor',
            to: 'http://example.com/followers',
          }
        end

        it 'creates a reblog by sender of status' do
          expect(sender.reblogged?(sender.statuses.first)).to be true
        end
      end

      context 'self-boost of a previously unknown status with correct attributedTo, inlined Collection in audience' do
        let(:object_json) do
          {
            id: 'https://example.com/actor#bar',
            type: 'Note',
            content: 'Lorem ipsum',
            attributedTo: 'https://example.com/actor',
            to: {
              'type': 'OrderedCollection',
              'id': 'http://example.com/followers',
              'first': 'http://example.com/followers?page=true',
            }
          }
        end

        it 'creates a reblog by sender of status' do
          expect(sender.reblogged?(sender.statuses.first)).to be true
        end
      end
    end

    context 'when the status belongs to a local user' do
      before do
        subject.perform
      end

      let(:object_json) do
        ActivityPub::TagManager.instance.uri_for(status)
      end

      it 'creates a reblog by sender of status' do
        expect(sender.reblogged?(status)).to be true
      end
    end

    context 'when the sender is relayed' do
      let!(:relay_account) { Fabricate(:account, inbox_url: 'https://relay.example.com/inbox') }
      let!(:relay) { Fabricate(:relay, inbox_url: 'https://relay.example.com/inbox') }

      let(:object_json) { 'https://example.com/actor/hello-world' }

      subject { described_class.new(json, sender, relayed_through_account: relay_account) }

      before do
        stub_request(:get, 'https://example.com/actor/hello-world').to_return(body: Oj.dump(unknown_object_json))
      end

      context 'and the relay is enabled' do
        before do
          relay.update(state: :accepted)
          subject.perform
        end

        it 'fetches the remote status' do
          expect(a_request(:get, 'https://example.com/actor/hello-world')).to have_been_made
          expect(Status.find_by(uri: 'https://example.com/actor/hello-world').text).to eq 'Hello world'
        end
      end

      context 'and the relay is disabled' do
        before do
          subject.perform
        end

        it 'does not fetch the remote status' do
          expect(a_request(:get, 'https://example.com/actor/hello-world')).not_to have_been_made
          expect(Status.find_by(uri: 'https://example.com/actor/hello-world')).to be_nil
        end

        it 'does not create anything' do
          expect(sender.statuses.count).to eq 0
        end
      end
    end

    context 'when the sender has no relevance to local activity' do
      before do
        subject.perform
      end

      let(:object_json) do
        {
          id: 'https://example.com/actor#bar',
          type: 'Note',
          content: 'Lorem ipsum',
          to: 'http://example.com/followers',
          attributedTo: 'https://example.com/actor',
        }
      end

      it 'does not create anything' do
        expect(sender.statuses.count).to eq 0
      end
    end
  end
end