private void assertGroupsAllowedDown(int groupCount, double groupsAllowedDown, int expectedGroupsAllowedDown) {
        var services = servicesWithGroups(groupCount, groupsAllowedDown);
        var model = createEnd2EndOneNode(new TestProperties(), services);

        var fleetControllerConfigBuilder = new FleetcontrollerConfig.Builder();
        model.getConfig(fleetControllerConfigBuilder, "admin/cluster-controllers/0/components/clustercontroller-storage-configurer");
        var config = fleetControllerConfigBuilder.build();

        assertEquals(expectedGroupsAllowedDown, config.max_number_of_groups_allowed_to_be_down());
    }
Here there is no good choice.
config-model/src/test/java/com/yahoo/vespa/model/content/ContentClusterTest.java