def METHOD_NAME(aggregator):
    check = VespaCheck("vespa", {}, {})
    with open(os.path.join(HERE, 'service_unknown.json'), 'r') as f:
        check._get_metrics_json = MagicMock(return_value=json.load(f))
    check.check({'consumer': 'default', 'tags': ['tag1:val1']})
    aggregator.assert_service_check(
        check.PROCESS_SERVICE_CHECK,
        VespaCheck.WARNING,
        count=1,
        message='Service vespa.unknown-service reports unknown status: Empty status page',
        tags=['instance:unknown-service', 'vespaVersion:7.0.0', 'vespa-service:vespa.unknown-service', 'tag1:val1'],
    )
    aggregator.assert_service_check(check.PROCESS_SERVICE_CHECK, VespaCheck.OK, count=0)