Set and store report URIs (#10303)

Fixes #10271

spec/lib/activitypub/activity/flag_spec.rb

@@ -1,14 +1,15 @@
 require 'rails_helper'
 
 RSpec.describe ActivityPub::Activity::Flag do
-  let(:sender)  { Fabricate(:account, domain: 'example.com') }
+  let(:sender)  { Fabricate(:account, domain: 'example.com', uri: 'http://example.com/account') }
   let(:flagged) { Fabricate(:account) }
   let(:status)  { Fabricate(:status, account: flagged, uri: 'foobar') }
+  let(:flag_id) { nil }
 
   let(:json) do
     {
       '@context': 'https://www.w3.org/ns/activitystreams',
-      id: nil,
+      id: flag_id,
       type: 'Flag',
       content: 'Boo!!',
       actor: ActivityPub::TagManager.instance.uri_for(sender),
@@ -34,4 +35,22 @@ RSpec.describe ActivityPub::Activity::Flag do
       expect(report.status_ids).to eq [status.id]
     end
   end
+
+  describe '#perform with a defined uri' do
+    subject { described_class.new(json, sender) }
+    let (:flag_id) { 'http://example.com/reports/1' }
+
+    before do
+      subject.perform
+    end
+
+    it 'creates a report' do
+      report = Report.find_by(account: sender, target_account: flagged)
+
+      expect(report).to_not be_nil
+      expect(report.comment).to eq 'Boo!!'
+      expect(report.status_ids).to eq [status.id]
+      expect(report.uri).to eq flag_id
+    end
+  end
 end