Added RequestAuthenticator spec

spec/lib/gitlab/auth/request_authenticator_spec.rb

+require 'spec_helper'
+
+describe Gitlab::Auth::RequestAuthenticator do
+  let(:env) do
+    {
+      'rack.input' => '',
+      'REQUEST_METHOD' => 'GET'
+    }
+  end
+  let(:request) { ActionDispatch::Request.new(env) }
+
+  subject { described_class.new(request) }
+
+  describe '.user' do
+    let!(:sessionless_user) { build(:user) }
+    let!(:session_user) { build(:user) }
+
+    it 'returns sessionless user first' do
+      allow_any_instance_of(described_class).to receive(:find_sessionless_user).and_return(sessionless_user)
+      allow_any_instance_of(described_class).to receive(:find_user_from_warden).and_return(session_user)
+
+      expect(subject.user).to eq sessionless_user
+    end
+
+    it 'returns session user if no sessionless user found' do
+      allow_any_instance_of(described_class).to receive(:find_user_from_warden).and_return(session_user)
+
+      expect(subject.user).to eq session_user
+    end
+
+    it 'returns nil if no user found' do
+      expect(subject.user).to be_blank
+    end
+
+    it 'bubbles up exceptions' do
+      allow_any_instance_of(described_class).to receive(:find_user_from_warden).and_raise(API::APIGuard::UnauthorizedError)
+    end
+  end
+
+  describe '.find_sessionless_user' do
+    let!(:access_token_user) { build(:user) }
+    let!(:rss_token_user) { build(:user) }
+
+    it 'returns access_token user first' do
+      allow_any_instance_of(described_class).to receive(:find_user_from_access_token).and_return(access_token_user)
+      allow_any_instance_of(described_class).to receive(:find_user_from_rss_token).and_return(rss_token_user)
+
+      expect(subject.find_sessionless_user).to eq access_token_user
+    end
+
+    it 'returns rss_token user if no access_token user found' do
+      allow_any_instance_of(described_class).to receive(:find_user_from_rss_token).and_return(rss_token_user)
+
+      expect(subject.find_sessionless_user).to eq rss_token_user
+    end
+
+    it 'returns nil if no user found' do
+      expect(subject.find_sessionless_user).to be_blank
+    end
+
+    it 'rescue StandardError exceptions' do
+      allow_any_instance_of(described_class).to receive(:find_user_from_access_token).and_raise(API::APIGuard::UnauthorizedError)
+
+      expect(subject.find_sessionless_user).to be_blank
+    end
+  end
+end