1 files changed, 27 insertions, 0 deletions
diff --git a/spec/serializers/diff_file_metadata_entity_spec.rb b/spec/serializers/diff_file_metadata_entity_spec.rb
new file mode 100644
index 00000000000..3ce1ea49677
--- /dev/null
+++ b/spec/serializers/diff_file_metadata_entity_spec.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe DiffFileMetadataEntity do
+  let(:merge_request) { create(:merge_request_with_diffs) }
+  let(:raw_diff_file) { merge_request.merge_request_diff.diffs.raw_diff_files.first }
+  let(:entity) { described_class.new(raw_diff_file) }
+
+  context 'as json' do
+    subject { entity.as_json }
+
+    it 'exposes the expected fields' do
+      expect(subject.keys).to contain_exactly(
+        :added_lines,
+        :removed_lines,
+        :new_path,
+        :old_path,
+        :new_file,
+        :deleted_file,
+        :submodule,
+        :file_identifier_hash,
+        :file_hash
+      )
+    end
+  end
+end