Added Specs for GeoRepositoryDestroyWorker to cover repo on disk removal

spec/workers/geo_repository_destroy_worker_spec.rb

+require 'spec_helper'
+
+describe GeoRepositoryDestroyWorker do
+  let!(:project) { create :project_empty_repo }
+  let!(:path) { project.repository.path_with_namespace }
+  let!(:remove_path) { path.sub(/\.git\Z/, "+#{project.id}+deleted.git") }
+  let(:perform!) { subject.perform(project.id, project.name, path) }
+
+  before do
+    project.delete
+  end
+
+  it 'delegates project removal to Projects::DestroyService' do
+    expect_any_instance_of(::Projects::DestroyService).to receive(:geo_replicate)
+
+    perform!
+  end
+
+  context 'sidekiq execution' do
+    it 'removes the repository from disk' do
+      expect(project.gitlab_shell.exists?(project.repository_storage_path, path + '.git')).to be_truthy
+
+      Sidekiq::Testing.inline! { perform! }
+
+      expect(project.gitlab_shell.exists?(project.repository_storage_path, path + '.git')).to be_falsey
+      expect(project.gitlab_shell.exists?(project.repository_storage_path, remove_path + '.git')).to be_falsey
+    end
+  end
+end