1 files changed, 36 insertions, 0 deletions
diff --git a/spec/models/diff_viewer/server_side_spec.rb b/spec/models/diff_viewer/server_side_spec.rb
new file mode 100644
index 00000000000..2d926e06936
--- /dev/null
+++ b/spec/models/diff_viewer/server_side_spec.rb
@@ -0,0 +1,36 @@
+require 'spec_helper'
+
+describe DiffViewer::ServerSide, model: true do
+  let(:project) { create(:project, :repository) }
+  let(:commit) { project.commit('570e7b2abdd848b95f2f578043fc23bd6f6fd24d') }
+  let(:diff_file) { commit.diffs.diff_file_with_new_path('files/ruby/popen.rb') }
+
+  let(:viewer_class) do
+    Class.new(DiffViewer::Base) do
+      include DiffViewer::ServerSide
+    end
+  end
+
+  subject { viewer_class.new(diff_file) }
+
+  describe '#prepare!' do
+    it 'loads all diff file data' do
+      expect(diff_file.old_blob).to receive(:load_all_data!)
+      expect(diff_file.new_blob).to receive(:load_all_data!)
+
+      subject.prepare!
+    end
+  end
+
+  describe '#render_error' do
+    context 'when the diff file is stored externally' do
+      before do
+        allow(diff_file).to receive(:stored_externally?).and_return(true)
+      end
+
+      it 'return :server_side_but_stored_externally' do
+        expect(subject.render_error).to eq(:server_side_but_stored_externally)
+      end
+    end
+  end
+end