@Test
    void testRenderingOfListsAddedTwice() throws Exception {
        StringDataList dataList = createDataListWithReusedSublist();

        TestRenderer renderer = new TestRenderer();
        renderer.init();

        assertEquals(" beginResponse beginList[[[]], []] beginList[[]] beginList[] endList[] endList[[]] beginList[] endList[] endList[[[]], []] endResponse",
                     render(renderer, dataList));
    }
Validate we get a full response with a malformed response structure.
container-core/src/test/java/com/yahoo/processing/rendering/AsynchronousSectionedRendererTest.java