1 files changed, 73 insertions, 0 deletions
diff --git a/spec/services/achievements/update_user_achievement_priorities_service_spec.rb b/spec/services/achievements/update_user_achievement_priorities_service_spec.rb
new file mode 100644
index 00000000000..a020bf9770e
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+++ b/spec/services/achievements/update_user_achievement_priorities_service_spec.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Achievements::UpdateUserAchievementPrioritiesService, feature_category: :user_profile do
+  describe '#execute' do
+    let_it_be(:achievement_owner) { create(:user) }
+    let_it_be(:group) { create(:group) }
+
+    let_it_be(:achievement) { create(:achievement, namespace: group) }
+
+    let!(:user_achievement1) do
+      create(:user_achievement, achievement: achievement, user: achievement_owner, priority: 0)
+    end
+
+    let_it_be(:user_achievement2) { create(:user_achievement, achievement: achievement, user: achievement_owner) }
+    let_it_be(:user_achievement3) { create(:user_achievement, achievement: achievement, user: achievement_owner) }
+
+    subject(:response) { described_class.new(current_user, user_achievements).execute }
+
+    context 'when user does not have permission' do
+      let(:current_user) { create(:user) }
+      let(:user_achievements) { [user_achievement1] }
+
+      it 'returns an error', :aggregate_failures do
+        expect(response).to be_error
+        expect(response.message).to match_array(["You can't update at least one of the given user achievements."])
+      end
+    end
+
+    context 'when user has permission' do
+      let_it_be_with_reload(:current_user) { achievement_owner }
+
+      context 'with empty input' do
+        let(:user_achievements) { [] }
+
+        it 'removes all priorities', :aggregate_failures do
+          expect(response).to be_success
+
+          [user_achievement1, user_achievement2, user_achievement3].each do |ua|
+            expect(ua.reload.priority).to be_nil
+          end
+        end
+      end
+
+      context 'with prioritised achievements' do
+        let(:user_achievements) { [user_achievement3, user_achievement1] }
+
+        it 're-orders the achievements correctly', :aggregate_failures do
+          expect(response).to be_success
+
+          expect(user_achievement1.reload.priority).to eq(1)
+          expect(user_achievement2.reload.priority).to be_nil
+          expect(user_achievement3.reload.priority).to be_zero
+        end
+      end
+
+      context 'when no achievement is prioritized and no prioritizations are made' do
+        let!(:user_achievement1) { create(:user_achievement, achievement: achievement, user: achievement_owner) }
+
+        let(:user_achievements) { [] }
+
+        it 'works without errors', :aggregate_failures do
+          expect(response).to be_success
+
+          [user_achievement1, user_achievement2, user_achievement3].each do |ua|
+            expect(ua.reload.priority).to be_nil
+          end
+        end
+      end
+    end
+  end
+end