Add fetch_instance_info_worker_spec

spec/workers/activitypub/fetch_instance_info_worker_spec.rb

@@ -0,0 +1,65 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe ActivityPub::FetchInstanceInfoWorker do
+  subject { described_class.new }
+
+  let(:wellknown_nodeinfo) do
+    {
+      links: [
+        {
+          rel: 'http://nodeinfo.diaspora.software/ns/schema/2.0',
+          href: 'https://example.com/nodeinfo/2.0',
+        },
+      ],
+    }
+  end
+
+  let(:nodeinfo) do
+    {
+      version: '2.0',
+      software: {
+        name: 'mastodon',
+        version: '4.2.0-beta1',
+      },
+      protocols: ['activitypub'],
+    }
+  end
+
+  let(:wellknown_nodeinfo_json) { Oj.dump(wellknown_nodeinfo) }
+  let(:nodeinfo_json) { Oj.dump(nodeinfo) }
+
+  context 'when success' do
+    before do
+      stub_request(:get, 'https://example.com/.well-known/nodeinfo').to_return(status: 200, body: wellknown_nodeinfo_json)
+      stub_request(:get, 'https://example.com/nodeinfo/2.0').to_return(status: 200, body: nodeinfo_json)
+      Fabricate(:account, domain: 'example.com')
+      Instance.refresh
+    end
+
+    it 'performs a mastodon instance' do
+      subject.perform('example.com')
+
+      info = InstanceInfo.find_by(domain: 'example.com')
+      expect(info).to_not be_nil
+      expect(info.software).to eq 'mastodon'
+      expect(info.version).to eq '4.2.0-beta1'
+    end
+  end
+
+  context 'when failed' do
+    before do
+      stub_request(:get, 'https://example.com/.well-known/nodeinfo').to_return(status: 404)
+      Fabricate(:account, domain: 'example.com')
+      Instance.refresh
+    end
+
+    it 'performs a mastodon instance' do
+      expect { subject.perform('example.com') }.to raise_error(ActivityPub::FetchInstanceInfoWorker::RequestError, 'Request for example.com returned HTTP 404')
+
+      info = InstanceInfo.find_by(domain: 'example.com')
+      expect(info).to be_nil
+    end
+  end
+end