Add tests for project destroy service

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

spec/services/projects/destroy_service_spec.rb

+require 'spec_helper'
+
+describe Projects::DestroyService do
+  let!(:user) { create(:user) }
+  let!(:project) { create(:project, namespace: user.namespace) }
+  let!(:path) { project.repository.path_to_repo }
+  let!(:remove_path) { path.sub(/\.git\Z/, "+#{project.id}+deleted.git") }
+
+  context 'Sidekiq inline' do
+    before do
+      # Run sidekiq immediatly to check that renamed repository will be removed
+      Sidekiq::Testing.inline! { destroy_project(project, user, {}) }
+    end
+
+    it { Project.all.should_not include(project) }
+    it { Dir.exists?(path).should be_falsey }
+    it { Dir.exists?(remove_path).should be_falsey }
+  end
+
+  context 'Sidekiq fake' do
+    before do
+      # Dont run sidekiq to check if renamed repository exists
+      Sidekiq::Testing.fake! { destroy_project(project, user, {}) }
+    end
+
+    it { Project.all.should_not include(project) }
+    it { Dir.exists?(path).should be_falsey }
+    it { Dir.exists?(remove_path).should be_truthy }
+  end
+
+  def destroy_project(project, user, params)
+    Projects::DestroyService.new(project, user, params).execute
+  end
+end