Fix failed rack attack specs

spec/lib/gitlab/rack_attack_spec.rb

@@ -6,6 +6,7 @@ RSpec.describe Gitlab::RackAttack, :aggregate_failures do
   describe '.configure' do
     let(:fake_rack_attack) { class_double("Rack::Attack") }
     let(:fake_rack_attack_request) { class_double("Rack::Attack::Request") }
+    let(:fake_cache) { instance_double("Rack::Attack::Cache") }
 
     let(:throttles) do
       {
@@ -27,6 +28,8 @@ RSpec.describe Gitlab::RackAttack, :aggregate_failures do
       allow(fake_rack_attack).to receive(:track)
       allow(fake_rack_attack).to receive(:safelist)
       allow(fake_rack_attack).to receive(:blocklist)
+      allow(fake_rack_attack).to receive(:cache).and_return(fake_cache)
+      allow(fake_cache).to receive(:store=)
     end
 
     it 'extends the request class' do

spec/requests/rack_attack_global_spec.rb

@@ -149,16 +149,16 @@ RSpec.describe 'Rack Attack global throttles' do
           expect(response).to have_gitlab_http_status(:ok)
         end
 
-        arguments = {
+        arguments = a_hash_including({
           message: 'Rack_Attack',
           env: :throttle,
           remote_ip: '127.0.0.1',
           request_method: 'GET',
           path: '/users/sign_in',
           matched: 'throttle_unauthenticated'
-        }
+        })
 
-        expect(Gitlab::AuthLogger).to receive(:error).with(arguments)
+        expect(Gitlab::AuthLogger).to receive(:error).with(arguments).at_least(:once)
 
         get url_that_does_not_require_authentication
       end