@BeforeEach
    void beforeEach() {
        final Listener listener = XdsTestResources.exampleListener("listener_0",
                                                                   "local_route", BOOTSTRAP_CLUSTER_NAME);
        final RouteConfiguration routeConfiguration =
                XdsTestResources.routeConfiguration("local_route", "some_service");
        cache.setSnapshot(
                GROUP,
                Snapshot.create(ImmutableList.of(exampleCluster()),
                                ImmutableList.of(exampleEndpoint()),
                                ImmutableList.of(listener),
                                ImmutableList.of(routeConfiguration),
                                ImmutableList.of(), "1"));
    }
This class ensures that the dynamic bootstrap configuration example at
<a href="https://www.envoyproxy.io/docs/envoy/latest/configuration/overview/examples#dynamic">
Dynamic Example</a> is parsed and fetched correctly.
xds/src/test/java/com/linecorp/armeria/xds/DynamicResourcesTest.java