Add integration tests for mastodon-streaming (#36025)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>
Co-authored-by: David Roetzel <david@roetzel.de>

spec/system/streaming/streaming_spec.rb

@@ -0,0 +1,77 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+RSpec.describe 'Streaming', :inline_jobs, :streaming do
+  let(:authentication_method) { StreamingClient::AUTHENTICATION::SUBPROTOCOL }
+  let(:user) { Fabricate(:user) }
+  let(:scopes) { '' }
+  let(:application) { Fabricate(:application, confidential: false) }
+  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, application: application, scopes: scopes) }
+  let(:access_token) { token.token }
+
+  before do
+    streaming_client.authenticate(access_token, authentication_method)
+  end
+
+  after do
+    streaming_client.close
+  end
+
+  context 'when authenticating via subprotocol' do
+    it 'is able to connect' do
+      streaming_client.connect
+
+      expect(streaming_client.status).to eq(101)
+      expect(streaming_client.open?).to be(true)
+    end
+  end
+
+  context 'when authenticating via authorization header' do
+    let(:authentication_method) { StreamingClient::AUTHENTICATION::AUTHORIZATION_HEADER }
+
+    it 'is able to connect successfully' do
+      streaming_client.connect
+
+      expect(streaming_client.status).to eq(101)
+      expect(streaming_client.open?).to be(true)
+    end
+  end
+
+  context 'when authenticating via query parameter' do
+    let(:authentication_method) { StreamingClient::AUTHENTICATION::QUERY_PARAMETER }
+
+    it 'is able to connect successfully' do
+      streaming_client.connect
+
+      expect(streaming_client.status).to eq(101)
+      expect(streaming_client.open?).to be(true)
+    end
+  end
+
+  context 'with a revoked access token' do
+    before do
+      token.revoke
+    end
+
+    it 'receives an 401 unauthorized error' do
+      streaming_client.connect
+
+      expect(streaming_client.status).to eq(401)
+      expect(streaming_client.open?).to be(false)
+    end
+  end
+
+  context 'when revoking an access token after connection' do
+    it 'disconnects the client' do
+      streaming_client.connect
+
+      expect(streaming_client.status).to eq(101)
+      expect(streaming_client.open?).to be(true)
+
+      token.revoke
+
+      expect(streaming_client.wait_for(:closed).code).to be(1000)
+      expect(streaming_client.open?).to be(false)
+    end
+  end
+end