@Test
    void testDefaultRendererIsAddedToRegistryWhenNoneIsGivenByUser() {
        String defaultId = AbstractProcessingHandler.DEFAULT_RENDERER_ID;

        driver = new ProcessingTestDriver(List.of());
        Renderer defaultRenderer = driver.processingHandler().getRenderers().getComponent(defaultId);
        assertNotNull(defaultRenderer);

    }
Tests that the ResponseStatus takes precedence over errors
container-core/src/test/java/com/yahoo/processing/handler/ProcessingHandlerTestCase.java