func testIterator(t *testing.T, db btcdb.Db, shas []btcwire.ShaHash,
sync string) {
// Iterate over the whole list of shas.
iter, err := db.NewIterateBlocks()
if err != nil {
t.Errorf("failed to create iterated blocks")
return
}
// Skip the genesis block.
_ = iter.NextRow()
i := 0
for ; iter.NextRow(); i++ {
key, pver, buf, err := iter.Row()
if err != nil {
t.Errorf("iter.NextRow() failed: %v (%s)", err, sync)
break
}
if i >= len(shas) {
t.Errorf("iterator returned more shas than "+
"expected - %d (%s)", i, sync)
break
}
if !key.IsEqual(&shas[i]) {
t.Errorf("iterator test: %dth sha doesn't match (%s)",
i, sync)
}
if !bytes.Equal(zeroBlock, buf) {
t.Errorf("iterator test: %d buf incorrect (%s)", i,
sync)
}
if pver != 1 {
t.Errorf("iterator: %dth pver is %d and not 1 (%s)",
i, pver, sync)
}
}
if i < len(shas) {
t.Errorf("iterator got no rows on %dth loop, should have %d "+
"(%s)", i, len(shas), sync)
}
if _, _, _, err = iter.Row(); err == nil {
t.Errorf("done iterator didn't return failure")
}
iter.Close()
}
