assertEquals("Hello, world!", response.get("content"));
        assertFalse(response.containsKey("sources"));
    }

    @Test
    public void test_createSuccessResponse_withSources() {
        final List<ChatSource> sources = new ArrayList<>();
        final ChatSource source1 = new ChatSource();
        source1.setUrl("https://example.com/page1");
        source1.setTitle("Page 1");