// TestIterator tests the iterator
func TestIterator(t *testing.T, db statedb.VersionedDB) {
db.Open()
defer db.Close()
batch := statedb.NewUpdateBatch()
batch.Put("ns1", "key1", []byte("value1"), version.NewHeight(1, 1))
batch.Put("ns1", "key2", []byte("value2"), version.NewHeight(1, 2))
batch.Put("ns1", "key3", []byte("value3"), version.NewHeight(1, 3))
batch.Put("ns1", "key4", []byte("value4"), version.NewHeight(1, 4))
batch.Put("ns2", "key5", []byte("value5"), version.NewHeight(1, 5))
batch.Put("ns2", "key6", []byte("value6"), version.NewHeight(1, 6))
batch.Put("ns3", "key7", []byte("value7"), version.NewHeight(1, 7))
savePoint := version.NewHeight(2, 5)
db.ApplyUpdates(batch, savePoint)
itr1, _ := db.GetStateRangeScanIterator("ns1", "key1", "")
testItr(t, itr1, []string{"key1", "key2", "key3", "key4"})
itr2, _ := db.GetStateRangeScanIterator("ns1", "key2", "key3")
testItr(t, itr2, []string{"key2"})
itr3, _ := db.GetStateRangeScanIterator("ns1", "", "")
testItr(t, itr3, []string{"key1", "key2", "key3", "key4"})
itr4, _ := db.GetStateRangeScanIterator("ns2", "", "")
testItr(t, itr4, []string{"key5", "key6"})
}
