ActivityPub delivery (#4566)

* Deliver ActivityPub Like

* Deliver ActivityPub Undo-Like

* Deliver ActivityPub Create/Announce activities

* Deliver ActivityPub creates from mentions

* Deliver ActivityPub Block/Undo-Block

* Deliver ActivityPub Accept/Reject-Follow

* Deliver ActivityPub Undo-Follow

* Deliver ActivityPub Follow

* Deliver ActivityPub Delete activities

Incidentally fix #889

* Adjust BatchedRemoveStatusService for ActivityPub

* Add tests for ActivityPub workers

* Add tests for FollowService

* Add tests for FavouriteService, UnfollowService and PostStatusService

* Add tests for ReblogService, BlockService, UnblockService, ProcessMentionsService

* Add tests for AuthorizeFollowService, RejectFollowService, RemoveStatusService

* Add tests for BatchedRemoveStatusService

* Deliver updates to a local account to ActivityPub followers

* Minor adjustments

spec/services/reblog_service_spec.rb

@@ -2,22 +2,49 @@ require 'rails_helper'
 
 RSpec.describe ReblogService do
   let(:alice)  { Fabricate(:account, username: 'alice') }
-  let(:bob)    { Fabricate(:account, username: 'bob', domain: 'example.com', salmon_url: 'http://salmon.example.com') }
-  let(:status) { Fabricate(:status, account: bob, uri: 'tag:example.com;something:something') }
 
-  subject { ReblogService.new }
+  context 'OStatus' do
+    let(:bob)    { Fabricate(:account, username: 'bob', domain: 'example.com', salmon_url: 'http://salmon.example.com') }
+    let(:status) { Fabricate(:status, account: bob, uri: 'tag:example.com;something:something') }
 
-  before do
-    stub_request(:post, 'http://salmon.example.com')
+    subject { ReblogService.new }
 
-    subject.(alice, status)
+    before do
+      stub_request(:post, 'http://salmon.example.com')
+      subject.call(alice, status)
+    end
+
+    it 'creates a reblog' do
+      expect(status.reblogs.count).to eq 1
+    end
+
+    it 'sends a Salmon slap for a remote reblog' do
+      expect(a_request(:post, 'http://salmon.example.com')).to have_been_made
+    end
   end
 
-  it 'creates a reblog' do
-    expect(status.reblogs.count).to eq 1
-  end
+  context 'ActivityPub' do
+    let(:bob)    { Fabricate(:account, username: 'bob', protocol: :activitypub, domain: 'example.com', inbox_url: 'http://example.com/inbox') }
+    let(:status) { Fabricate(:status, account: bob) }
 
-  it 'sends a Salmon slap for a remote reblog' do
-    expect(a_request(:post, 'http://salmon.example.com')).to have_been_made
+    subject { ReblogService.new }
+
+    before do
+      stub_request(:post, bob.inbox_url)
+      allow(ActivityPub::DistributionWorker).to receive(:perform_async)
+      subject.call(alice, status)
+    end
+
+    it 'creates a reblog' do
+      expect(status.reblogs.count).to eq 1
+    end
+
+    it 'distributes to followers' do
+      expect(ActivityPub::DistributionWorker).to have_received(:perform_async)
+    end
+
+    it 'sends an announce activity to the author' do
+      expect(a_request(:post, bob.inbox_url)).to have_been_made.once
+    end
   end
 end