1 files changed, 36 insertions, 0 deletions
diff --git a/spec/serializers/discussion_entity_spec.rb b/spec/serializers/discussion_entity_spec.rb
new file mode 100644
index 00000000000..7ee8e38af1c
--- /dev/null
+++ b/spec/serializers/discussion_entity_spec.rb
@@ -0,0 +1,36 @@
+require 'spec_helper'
+
+describe DiscussionEntity do
+  include RepoHelpers
+
+  let(:user) { create(:user) }
+  let(:note) { create(:discussion_note_on_merge_request) }
+  let(:discussion) { note.discussion }
+  let(:request) { double('request') }
+  let(:controller) { double('controller') }
+  let(:entity) { described_class.new(discussion, request: request, context: controller) }
+
+  subject { entity.as_json }
+
+  before do
+    allow(controller).to receive(:render_to_string)
+    allow(request).to receive(:current_user).and_return(user)
+    allow(request).to receive(:noteable).and_return(note.noteable)
+  end
+
+  it 'exposes correct attributes' do
+    expect(subject).to include(
+      :id, :expanded, :notes, :individual_note,
+      :resolvable, :resolved, :resolve_path,
+      :resolve_with_issue_path, :diff_discussion
+    )
+  end
+
+  context 'when diff file is present' do
+    let(:note) { create(:diff_note_on_merge_request) }
+
+    it 'exposes diff file attributes' do
+      expect(subject).to include(:diff_file, :truncated_diff_lines, :image_diff_html)
+    end
+  end
+end