Fix spec/migrations/update_upload_paths_to_system_spec.rb to use the :migration metadata

spec/migrations/update_upload_paths_to_system_spec.rb

-require "spec_helper"
-require Rails.root.join("db", "post_migrate", "20170317162059_update_upload_paths_to_system.rb")
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20170317162059_update_upload_paths_to_system.rb')
 
-describe UpdateUploadPathsToSystem do
+describe UpdateUploadPathsToSystem, :migration do
   let(:migration) { described_class.new }
+  let(:uploads_table) { table(:uploads) }
+  let(:base_upload_attributes) { { size: 42, uploader: 'John Doe' } }
 
   before do
     allow(migration).to receive(:say)
   end
 
-  describe "#uploads_to_switch_to_new_path" do
-    it "contains only uploads with the old path for the correct models" do
-      _upload_for_other_type = create(:upload, model: create(:ci_pipeline), path: "uploads/ci_pipeline/avatar.jpg")
-      _upload_with_system_path = create(:upload, model: create(:project), path: "uploads/-/system/project/avatar.jpg")
-      _upload_with_other_path = create(:upload, model: create(:project), path: "thelongsecretforafileupload/avatar.jpg")
-      old_upload = create(:upload, model: create(:project), path: "uploads/project/avatar.jpg")
-      group_upload = create(:upload, model: create(:group), path: "uploads/group/avatar.jpg")
+  describe '#uploads_to_switch_to_new_path' do
+    it 'contains only uploads with the old path for the correct models' do
+      _upload_for_other_type = create_upload('Pipeline', 'uploads/ci_pipeline/avatar.jpg')
+      _upload_with_system_path = create_upload('Project', 'uploads/-/system/project/avatar.jpg')
+      _upload_with_other_path = create_upload('Project', 'thelongsecretforafileupload/avatar.jpg')
+      old_upload = create_upload('Project', 'uploads/project/avatar.jpg')
+      group_upload = create_upload('Namespace', 'uploads/group/avatar.jpg')
 
-      expect(Upload.where(migration.uploads_to_switch_to_new_path)).to contain_exactly(old_upload, group_upload)
+      expect(uploads_table.where(migration.uploads_to_switch_to_new_path)).to contain_exactly(old_upload, group_upload)
     end
   end
 
-  describe "#uploads_to_switch_to_old_path" do
-    it "contains only uploads with the new path for the correct models" do
-      _upload_for_other_type = create(:upload, model: create(:ci_pipeline), path: "uploads/ci_pipeline/avatar.jpg")
-      upload_with_system_path = create(:upload, model: create(:project), path: "uploads/-/system/project/avatar.jpg")
-      _upload_with_other_path = create(:upload, model: create(:project), path: "thelongsecretforafileupload/avatar.jpg")
-      _old_upload = create(:upload, model: create(:project), path: "uploads/project/avatar.jpg")
+  describe '#uploads_to_switch_to_old_path' do
+    it 'contains only uploads with the new path for the correct models' do
+      _upload_for_other_type = create_upload('Pipeline', 'uploads/ci_pipeline/avatar.jpg')
+      upload_with_system_path = create_upload('Project', 'uploads/-/system/project/avatar.jpg')
+      _upload_with_other_path = create_upload('Project', 'thelongsecretforafileupload/avatar.jpg')
+      _old_upload = create_upload('Project', 'uploads/project/avatar.jpg')
 
-      expect(Upload.where(migration.uploads_to_switch_to_old_path)).to contain_exactly(upload_with_system_path)
+      expect(uploads_table.where(migration.uploads_to_switch_to_old_path)).to contain_exactly(upload_with_system_path)
     end
   end
 
-  describe "#up", :truncate do
-    it "updates old upload records to the new path" do
-      old_upload = create(:upload, model: create(:project), path: "uploads/project/avatar.jpg")
+  describe '#up' do
+    it 'updates old upload records to the new path' do
+      old_upload = create_upload('Project', 'uploads/project/avatar.jpg')
 
       migration.up
 
-      expect(old_upload.reload.path).to eq("uploads/-/system/project/avatar.jpg")
+      expect(old_upload.reload.path).to eq('uploads/-/system/project/avatar.jpg')
     end
   end
 
-  describe "#down", :truncate do
-    it "updates the new system patsh to the old paths" do
-      new_upload = create(:upload, model: create(:project), path: "uploads/-/system/project/avatar.jpg")
+  describe '#down' do
+    it 'updates the new system patsh to the old paths' do
+      new_upload = create_upload('Project', 'uploads/-/system/project/avatar.jpg')
 
       migration.down
 
-      expect(new_upload.reload.path).to eq("uploads/project/avatar.jpg")
+      expect(new_upload.reload.path).to eq('uploads/project/avatar.jpg')
     end
   end
+
+  def create_upload(type, path)
+    uploads_table.create(base_upload_attributes.merge(model_type: type, path: path))
+  end
 end