@Test void durationIndexBucket_notNegative() {
    // today isn't negative
    assertThat(CassandraUtil.durationIndexBucket(TODAY * 1000L)).isNotNegative();
    // neither is 10 years from now
    assertThat(CassandraUtil.durationIndexBucket((TODAY + TimeUnit.DAYS.toMillis(3654)) * 1000L))
      .isNotNegative();
  }
Sanity checks our bucketing scheme for numeric overflow
zipkin-storage/cassandra/src/test/java/zipkin2/storage/cassandra/CassandraUtilTest.java