require "test_helper" class AssistantMessageTest < ActiveSupport::TestCase setup do @chat = chats(:one) end test "broadcasts append after creation" do message = AssistantMessage.create!(chat: @chat, content: "Hello from assistant", ai_model: "gpt-4o") message.update!(content: "updated") streams = capture_turbo_stream_broadcasts(@chat) assert_equal 2, streams.size assert_equal "append", streams.first["action"] assert_equal "messages", streams.first["target"] assert_equal "update", streams.last["action"] assert_equal "assistant_message_#{message.id}", streams.last["target"] end end