Add json support to group members leave action in controller

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/controllers/concerns/membership_actions.rb

@@ -51,11 +51,16 @@ module MembershipActions
         "You left the \"#{membershipable.human_name}\" #{source_type}."
       end
 
+    respond_to do |format|
+      format.html do
         redirect_path = member.request? ? member.source : [:dashboard, membershipable.class.to_s.tableize]
-
         redirect_to redirect_path, notice: notice
       end
 
+      format.json { head :ok }
+    end
+  end
+
   protected
 
   def membershipable

spec/controllers/groups/group_members_controller_spec.rb

@@ -124,6 +124,13 @@ describe Groups::GroupMembersController do
           expect(response).to redirect_to(dashboard_groups_path)
           expect(group.users).not_to include user
         end
+
+        it 'supports json request' do
+          delete :leave, group_id: group, format: :json
+
+          expect(response).to have_http_status(200)
+          expect(response.body).to be_empty
+        end
       end
 
       context 'and is an owner' do