Remove more BG migration spec dependencies

For the `PrepareUntrackedUploads` spec.

spec/lib/gitlab/background_migration/populate_untracked_uploads_spec.rb

@@ -38,8 +38,8 @@ describe Gitlab::BackgroundMigration::PopulateUntrackedUploads, :sidekiq, :migra
       untracked_files_for_uploads.create!(path: get_uploads(user2, 'User').first.path)
       untracked_files_for_uploads.create!(path: get_uploads(project1, 'Project').first.path)
       untracked_files_for_uploads.create!(path: get_uploads(project2, 'Project').first.path)
-      untracked_files_for_uploads.create!(path: "#{project_uploads_dir(project1).sub("#{TrackUntrackedUploadsHelpers::PUBLIC_DIR}/", '')}/#{get_uploads(project1, 'Project').last.path}")
-      untracked_files_for_uploads.create!(path: "#{project_uploads_dir(project2).sub("#{TrackUntrackedUploadsHelpers::PUBLIC_DIR}/", '')}/#{get_uploads(project2, 'Project').last.path}")
+      untracked_files_for_uploads.create!(path: "#{legacy_project_uploads_dir(project1).sub("#{TrackUntrackedUploadsHelpers::PUBLIC_DIR}/", '')}/#{get_uploads(project1, 'Project').last.path}")
+      untracked_files_for_uploads.create!(path: "#{legacy_project_uploads_dir(project2).sub("#{TrackUntrackedUploadsHelpers::PUBLIC_DIR}/", '')}/#{get_uploads(project2, 'Project').last.path}")
 
       # Untrack 4 files
       get_uploads(user2, 'User').delete_all

spec/lib/gitlab/background_migration/prepare_untracked_uploads_spec.rb

 require 'spec_helper'
 
-describe Gitlab::BackgroundMigration::PrepareUntrackedUploads, :sidekiq, :migration, schema: 20180129193323 do
+# Rollback DB to 10.5 (later than this was originally written for) because it still needs to work.
+describe Gitlab::BackgroundMigration::PrepareUntrackedUploads, :sidekiq, :migration, schema: 20180208183958 do
   include TrackUntrackedUploadsHelpers
-  include MigrationsHelpers
 
   let!(:untracked_files_for_uploads) { described_class::UntrackedFile }
+  let!(:appearances) { table(:appearances) }
+  let!(:namespaces) { table(:namespaces) }
+  let!(:projects) { table(:projects) }
+  let!(:routes) { table(:routes) }
+  let!(:uploads) { table(:uploads) }
+  let!(:users) { table(:users) }
 
   around do |example|
     # Especially important so the follow-up migration does not get run
@@ -15,19 +21,17 @@ describe Gitlab::BackgroundMigration::PrepareUntrackedUploads, :sidekiq, :migrat
 
   shared_examples 'prepares the untracked_files_for_uploads table' do
     context 'when files were uploaded before and after hashed storage was enabled' do
-      let!(:appearance) { create_or_update_appearance(logo: uploaded_file, header_logo: uploaded_file) }
-      let!(:user) { create(:user, :with_avatar) }
-      let!(:project1) { create(:project, :with_avatar, :legacy_storage) }
-      let(:project2) { create(:project) } # instantiate after enabling hashed_storage
+      let!(:appearance) { create_or_update_appearance(logo: true, header_logo: true) }
+      let!(:user) { create_user(avatar: true) }
+      let!(:project1) { create_project(avatar: true) }
+      let(:project2) { create_project } # instantiate after enabling hashed_storage
 
       before do
         # Markdown upload before enabling hashed_storage
-        UploadService.new(project1, uploaded_file, FileUploader).execute
-
-        stub_application_setting(hashed_storage_enabled: true)
+        add_markdown_attachment(project1)
 
         # Markdown upload after enabling hashed_storage
-        UploadService.new(project2, uploaded_file, FileUploader).execute
+        add_markdown_attachment(project2, hashed_storage: true)
       end
 
       it 'has a path field long enough for really long paths' do
@@ -61,7 +65,7 @@ describe Gitlab::BackgroundMigration::PrepareUntrackedUploads, :sidekiq, :migrat
       it 'does not add hashed files to the untracked_files_for_uploads table' do
         described_class.new.perform
 
-        hashed_file_path = project2.uploads.where(uploader: 'FileUploader').first.path
+        hashed_file_path = get_uploads(project2, 'Project').where(uploader: 'FileUploader').first.path
         expect(untracked_files_for_uploads.where("path like '%#{hashed_file_path}%'").exists?).to be_falsey
       end
 

spec/support/track_untracked_uploads_helpers.rb

@@ -71,8 +71,8 @@ module TrackUntrackedUploadsHelpers
     )
   end
 
-  def add_markdown_attachment(project)
-    project_dir = project_uploads_dir(project)
+  def add_markdown_attachment(project, hashed_storage: false)
+    project_dir = hashed_storage ? hashed_project_uploads_dir(project) : legacy_project_uploads_dir(project)
     attachment_dir = File.join(project_dir, SecureRandom.hex)
     attachment_file_path = File.join(attachment_dir, UPLOAD_FILENAME)
     project_attachment_path_relative_to_project = attachment_file_path.sub("#{project_dir}/", '')
@@ -88,8 +88,13 @@ module TrackUntrackedUploadsHelpers
     )
   end
 
-  def project_uploads_dir(project)
-    File.join(UPLOADS_DIR, project.full_path)
+  def legacy_project_uploads_dir(project)
+    namespace = namespaces.find_by(id: project.namespace_id)
+    File.join(UPLOADS_DIR, namespace.path, project.path)
+  end
+
+  def hashed_project_uploads_dir(project)
+    File.join(UPLOADS_DIR, '@hashed', 'aa', 'aaaaaaaaaaaa')
   end
 
   def upload_file_path(model, model_type, attachment_type)