Get LfsTransfer spec working

ee/spec/lib/gitlab/geo/lfs_transfer_spec.rb

 require 'spec_helper'
 
-describe Gitlab::Geo::Transfer do
+describe Gitlab::Geo::LfsTransfer do
   include ::EE::GeoHelpers
 
   set(:primary_node) { create(:geo_node, :primary) }
   set(:secondary_node) { create(:geo_node) }
   set(:lfs_object) { create(:lfs_object, :with_file) }
-  let(:lfs_object_file_path) { lfs_object.file.path }
   let(:url) { primary_node.geo_transfers_url(:lfs, lfs_object.id.to_s) }
   let(:content) { SecureRandom.random_bytes(10) }
   let(:size) { File.stat(lfs_object.file.path).size }
 
   subject do
-    described_class.new(:lfs,
-                        lfs_object.id,
-                        lfs_object_file_path,
-                        { sha256: lfs_object.oid })
+    described_class.new(lfs_object)
   end
 
   context '#download_from_primary' do
@@ -25,9 +21,9 @@ describe Gitlab::Geo::Transfer do
 
     context 'when the destination filename is a directory' do
       it 'returns a failed result' do
-        transfer = described_class.new(:lfs, lfs_object.id, '/tmp', { sha256: lfs_object.id })
+        expect(lfs_object).to receive(:file).and_return(double(path: '/tmp'))
 
-        result = transfer.download_from_primary
+        result = subject.download_from_primary
 
         expect_result(result, success: false, bytes_downloaded: 0, primary_missing_file: false)
       end
@@ -88,9 +84,9 @@ describe Gitlab::Geo::Transfer do
     end
 
     context "invalid path" do
-      let(:lfs_object_file_path) { '/foo/bar' }
-
       it 'logs an error if the destination directory could not be created' do
+        expect(lfs_object).to receive(:file).and_return(double(path: '/foo/bar'))
+
         allow(FileUtils).to receive(:mkdir_p) { raise Errno::EEXIST }
 
         expect(subject).to receive(:log_error).with("unable to create directory /foo: File exists")