Refactor Geo-finders specs to remove duplication

The way Shared Examples were being used (in reverse) were
causing issues and forcing multiple `let` blocks to be replicated
at each context.

ee/spec/finders/geo/job_artifact_registry_finder_spec.rb

@@ -20,7 +20,7 @@ describe Geo::JobArtifactRegistryFinder, :geo_fdw do
     stub_artifacts_object_storage
   end
 
-  shared_examples 'counts all the things' do
+  context 'counts all the things' do
     describe '#count_syncable' do
       let!(:job_artifact_1) { create(:ci_job_artifact, project: synced_project) }
       let!(:job_artifact_2) { create(:ci_job_artifact, project: unsynced_project) }
@@ -399,7 +399,7 @@ describe Geo::JobArtifactRegistryFinder, :geo_fdw do
     end
   end
 
-  shared_examples 'finds all the things' do
+  context 'finds all the things' do
     describe '#find_unsynced' do
       let!(:job_artifact_1) { create(:ci_job_artifact, project: synced_project) }
       let!(:job_artifact_2) { create(:ci_job_artifact, project: unsynced_project) }

ee/spec/finders/geo/lfs_object_registry_finder_spec.rb

@@ -31,7 +31,7 @@ describe Geo::LfsObjectRegistryFinder, :geo_fdw do
     stub_lfs_object_storage
   end
 
-  shared_examples 'counts all the things' do
+  context 'counts all the things' do
     describe '#count_syncable' do
       before do
         allow_any_instance_of(LfsObjectsProject).to receive(:update_project_statistics).and_return(nil)
@@ -361,7 +361,7 @@ describe Geo::LfsObjectRegistryFinder, :geo_fdw do
     end
   end
 
-  shared_examples 'finds all the things' do
+  context 'finds all the things' do
     describe '#find_unsynced' do
       it 'returns LFS objects without an entry on the tracking database' do
         create(:geo_file_registry, :lfs, file_id: lfs_object_1.id)

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

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::Geo::FileDownloader, :geo do
+  include EE::GeoHelpers
+
+  set(:primary_node) { create(:geo_node, :primary) }
+  set(:secondary_node) { create(:geo_node) }
+
+  subject { downloader.execute }
+
+  let(:upload) { create(:upload, :issuable_upload, :with_file) }
+  let(:downloader) { described_class.new(:file, upload.id) }
+
+  context 'when in primary geo node' do
+    before do
+      stub_current_geo_node(primary_node)
+    end
+
+    it 'fails to download the file' do
+      expect(subject.success).to be_falsey
+      expect(subject.primary_missing_file).to be_falsey
+    end
+  end
+
+  context 'when in a secondary geo node' do
+    before do
+      stub_current_geo_node(secondary_node)
+
+      stub_geo_file_transfer(:file, upload)
+    end
+
+    it 'downloads the file' do
+      expect(subject.success).to be_truthy
+      expect(subject.primary_missing_file).to be_falsey
+    end
+  end
+
+  def stub_geo_file_transfer(file_type, upload)
+    url = primary_node.geo_transfers_url(file_type, upload.id.to_s)
+
+    stub_request(:get, url).to_return(status: 200, body: upload.build_uploader.file.read, headers: {})
+  end
+end

ee/spec/support/shared_examples/finders/file_registry_finders.rb

@@ -17,7 +17,4 @@ shared_examples_for 'a file registry finder' do
       expect(subject).to respond_to(method)
     end
   end
-
-  include_examples 'counts all the things'
-  include_examples 'finds all the things'
 end