### Question:
NetflixConfig { public static Map<String, String> commonTags() { final Map<String, String> commonTags = new HashMap<>(); put(commonTags, "nf.app", Env.app()); put(commonTags, "nf.cluster", Env.cluster()); put(commonTags, "nf.asg", Env.asg()); put(commonTags, "nf.stack", Env.stack()); put(commonTags, "nf.shard1", Env.shard1()); put(commonTags, "nf.shard2", Env.shard2()); put(commonTags, "nf.zone", Env.zone()); put(commonTags, "nf.vmtype", Env.vmtype()); put(commonTags, "nf.node", Env.instanceId()); put(commonTags, "nf.region", Env.region()); put(commonTags, "nf.account", Env.accountId()); put(commonTags, "nf.task", Env.task()); put(commonTags, "nf.job", Env.job()); return commonTags; } private  NetflixConfig(); static Config createConfig(Config config); static Map<String, String> commonTags();  }### Answer:
@Test public void commonTagsCannotBeEmpty() { Map<String, String> commonTags = NetflixConfig.commonTags(); commonTags.forEach((k, v) -> Assertions.assertFalse(v.isEmpty())); }