### Question:
PredefinedConfigurationContextResolver implements ConfigurationContextResolver { public static PredefinedConfigurationContextResolver empty() { return new PredefinedConfigurationContextResolver(Collections.<String>emptyList()); } private  PredefinedConfigurationContextResolver(final List<String> tags); @Override List<String> getTags(); static PredefinedConfigurationContextResolver empty(); static PredefinedConfigurationContextResolver usingTags(final String... tags); static PredefinedConfigurationContextResolver usingTagsList(final List<String> tags);  }### Answer:
@Test public void testEmpty() throws Exception { final PredefinedConfigurationContextResolver contextResolver = PredefinedConfigurationContextResolver.empty(); assertEquals(0, contextResolver.getTags().size()); }