public void testComput_Level2_Empty() throws Exception {
FeatureCollectionResponse featureCollectionResponse = buildSomeFeatures("US");
m_sha1Sync.setCollection(featureCollectionResponse);
m_sha1Sync.parseSha1SyncJson("{l:2,h:[]}");
Sha1SyncJson sync = m_sha1Sync.compute();
assertEquals(3, sync.level());
assertEquals("result: " + sync, 0, sync.hashes().size());
assertEquals(1L, sync.max());
}