HttpServiceBalancerImpl implements HttpServiceBalancer { @Override public HttpServiceAttempt createAttempt() { return new HttpServiceAttemptImpl(ImmutableSet.of()); } HttpServiceBalancerImpl(String description, HttpServiceBalancerStats httpServiceBalancerStats, HttpServiceBalancerConfig config);   HttpServiceBalancerImpl(String description, HttpServiceBalancerStats httpServiceBalancerStats, HttpServiceBalancerConfig config, Ticker ticker); @Override HttpServiceAttempt createAttempt(); @Beta void updateHttpUris(Collection<URI> newHttpUris); @Nested MaxGauge getConcurrency();  }
@Test(expectedExceptions = ServiceUnavailableException.class) public void testNotStartedEmpty() { httpServiceBalancer.createAttempt(); }