Fix storage migration check for non-empty queues

The previous code works fine when running specs, but the API
does not exist outside that environment.

lib/gitlab/hashed_storage/migrator.rb

@@ -97,7 +97,7 @@ module Gitlab
 
       def any_non_empty_queue?(*workers)
         workers.any? do |worker|
-          worker.jobs.any?
+          !Sidekiq::Queue.new(worker.queue).size.zero?
         end
       end
 

spec/lib/gitlab/hashed_storage/migrator_spec.rb

@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-describe Gitlab::HashedStorage::Migrator, :sidekiq do
+describe Gitlab::HashedStorage::Migrator, :sidekiq, :redis do
   describe '#bulk_schedule_migration' do
     it 'schedules job to HashedStorage::MigratorWorker' do
       Sidekiq::Testing.fake! do
@@ -189,7 +189,7 @@ describe Gitlab::HashedStorage::Migrator, :sidekiq do
     set(:project) { create(:project, :empty_repo) }
 
     it 'returns true when there are MigratorWorker jobs scheduled' do
-      Sidekiq::Testing.fake! do
+      Sidekiq::Testing.disable! do
         ::HashedStorage::MigratorWorker.perform_async(1, 5)
 
         expect(subject.migration_pending?).to be_truthy
@@ -197,7 +197,7 @@ describe Gitlab::HashedStorage::Migrator, :sidekiq do
     end
 
     it 'returns true when there are ProjectMigrateWorker jobs scheduled' do
-      Sidekiq::Testing.fake! do
+      Sidekiq::Testing.disable! do
         ::HashedStorage::ProjectMigrateWorker.perform_async(1)
 
         expect(subject.migration_pending?).to be_truthy
@@ -213,7 +213,7 @@ describe Gitlab::HashedStorage::Migrator, :sidekiq do
     set(:project) { create(:project, :empty_repo) }
 
     it 'returns true when there are RollbackerWorker jobs scheduled' do
-      Sidekiq::Testing.fake! do
+      Sidekiq::Testing.disable! do
         ::HashedStorage::RollbackerWorker.perform_async(1, 5)
 
         expect(subject.rollback_pending?).to be_truthy
@@ -221,7 +221,7 @@ describe Gitlab::HashedStorage::Migrator, :sidekiq do
     end
 
     it 'returns true when there are jobs scheduled' do
-      Sidekiq::Testing.fake! do
+      Sidekiq::Testing.disable! do
         ::HashedStorage::ProjectRollbackWorker.perform_async(1)
 
         expect(subject.rollback_pending?).to be_truthy

spec/tasks/gitlab/storage_rake_spec.rb

@@ -89,9 +89,9 @@ describe 'rake gitlab:storage:*', :sidekiq do
   describe 'gitlab:storage:migrate_to_hashed' do
     let(:task) { 'gitlab:storage:migrate_to_hashed' }
 
-    context 'with rollback already scheduled' do
+    context 'with rollback already scheduled', :redis do
       it 'does nothing' do
-        Sidekiq::Testing.fake! do
+        Sidekiq::Testing.disable! do
           ::HashedStorage::RollbackerWorker.perform_async(1, 5)
 
           expect(Project).not_to receive(:with_unmigrated_storage)
@@ -146,9 +146,9 @@ describe 'rake gitlab:storage:*', :sidekiq do
 
     it_behaves_like 'make sure database is writable'
 
-    context 'with migration already scheduled' do
+    context 'with migration already scheduled', :redis do
       it 'does nothing' do
-        Sidekiq::Testing.fake! do
+        Sidekiq::Testing.disable! do
           ::HashedStorage::MigratorWorker.perform_async(1, 5)
 
           expect(Project).not_to receive(:with_unmigrated_storage)