Bring back Rugged implementation of TreeEntry

This brings back some of the changes in
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/20099/diffs

For users using Gitaly on top of NFS, accessing the Git data directly
via Rugged is more performant than Gitaly. This merge request introduces
the feature flag `rugged_tree_entry` to activate the Rugged method.

Part of four Rugged changes identified in
https://gitlab.com/gitlab-org/gitlab-ce/issues/57317.

1 files changed, 15 insertions, 1 deletions

diff --git a/spec/lib/gitlab/git/blob_spec.rb b/spec/lib/gitlab/git/blob_spec.rb
index a1b5cea88c0..10bc82e24d1 100644
--- a/spec/lib/gitlab/git/blob_spec.rb
+++ b/spec/lib/gitlab/git/blob_spec.rb
@@ -18,7 +18,7 @@ describe Gitlab::Git::Blob, :seed_helper do
     end
   end
 
-  describe '.find' do
+  shared_examples '.find' do
     context 'nil path' do
       let(:blob) { Gitlab::Git::Blob.find(repository, SeedRepo::Commit::ID, nil) }
 
@@ -128,6 +128,20 @@ describe Gitlab::Git::Blob, :seed_helper do
     end
   end
 
+  describe '.find with Gitaly enabled' do
+    it_behaves_like '.find'
+  end
+
+  describe '.find with Rugged enabled', :enable_rugged do
+    it 'calls out to the Rugged implementation' do
+      allow_any_instance_of(Rugged).to receive(:rev_parse).with(SeedRepo::Commit::ID).and_call_original
+
+      described_class.find(repository, SeedRepo::Commit::ID, 'files/images/6049019_460s.jpg')
+    end
+
+    it_behaves_like '.find'
+  end
+
   describe '.raw' do
     let(:raw_blob) { Gitlab::Git::Blob.raw(repository, SeedRepo::RubyBlob::ID) }
     let(:bad_blob) { Gitlab::Git::Blob.raw(repository, SeedRepo::BigCommit::ID) }