1 files changed, 57 insertions, 0 deletions
diff --git a/spec/serializers/merge_request_sidebar_extras_entity_spec.rb b/spec/serializers/merge_request_sidebar_extras_entity_spec.rb
new file mode 100644
index 00000000000..74e9956c8a0
--- /dev/null
+++ b/spec/serializers/merge_request_sidebar_extras_entity_spec.rb
@@ -0,0 +1,57 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe MergeRequestSidebarExtrasEntity do
+  let_it_be(:assignee) { build(:user) }
+  let_it_be(:reviewer) { build(:user) }
+  let_it_be(:user) { build(:user) }
+  let_it_be(:project) { create :project, :repository }
+
+  let(:params) do
+    {
+      source_project: project,
+      target_project: project,
+      assignees: [assignee],
+      reviewers: [reviewer]
+    }
+  end
+
+  let(:resource) do
+    build(:merge_request, params)
+  end
+
+  let(:request) { double('request', current_user: user, project: project) }
+
+  let(:entity) { described_class.new(resource, request: request).as_json }
+
+  describe '#assignees' do
+    it 'contains assignees attributes' do
+      expect(entity[:assignees].count).to be 1
+      expect(entity[:assignees].first.keys).to include(
+        :id, :name, :username, :state, :avatar_url, :web_url, :can_merge
+      )
+    end
+  end
+
+  describe '#reviewers' do
+    context 'when merge_request_reviewers feature is disabled' do
+      it 'does not contain reviewers attributes' do
+        stub_feature_flags(merge_request_reviewers: false)
+
+        expect(entity[:reviewers]).to be_nil
+      end
+    end
+
+    context 'when merge_request_reviewers feature is enabled' do
+      it 'contains reviewers attributes' do
+        stub_feature_flags(merge_request_reviewers: true)
+
+        expect(entity[:reviewers].count).to be 1
+        expect(entity[:reviewers].first.keys).to include(
+          :id, :name, :username, :state, :avatar_url, :web_url, :can_merge
+        )
+      end
+    end
+  end
+end