@Test
public void testDescribeWithTime() {

    L locator = getLocator();
    Set<K> keys = Sets.newHashSet();
    record = getRecord(locator);
    for (int i = 0; i < TestData.getScaleCount(); i++) {
        K key = getKey();
        keys.add(key);
        populateRecord(record, locator, key);
    }
    long timestamp = Time.now();
    for (int i = 0; i < TestData.getScaleCount(); i++) {
        K key = getKey();
        populateRecord(record, locator, key);
    }
    Assert.assertEquals(keys, record.describe(timestamp));
}