lnd.xprv/channeldb/witness_cache_test.go
Olaoluwa Osuntokun 850ff1d970
channeldb: add new WitnessCache structure
In this commit, we add the WitnessCache sub-storage system of the
greater database. The WitnessCache is a persistent cache of all
witnesses we’ve encountered on the network. We’ll use this cache to
share any on-chain discoveries between active channels. Eventually
we’ll also use this to enforce the variant that a preimage is only to
be used ONCE on the network.
2018-01-22 19:19:37 -08:00

115 lines
3.2 KiB
Go

package channeldb
import (
"crypto/sha256"
"reflect"
"testing"
)
// TestWitnessCacheRetrieval tests that we're able to add and lookup new
// witnesses to the witness cache.
func TestWitnessCacheRetrieval(t *testing.T) {
t.Parallel()
cdb, cleanUp, err := makeTestDB()
if err != nil {
t.Fatalf("unable to make test database: %v", err)
}
defer cleanUp()
wCache := cdb.NewWitnessCache()
// We'll be attempting to add then lookup a d simple hash witness
// within this test.
witness := rev[:]
witnessKey := sha256.Sum256(witness)
// First, we'll attempt to add the witness to the database.
err = wCache.AddWitness(Sha256HashWitness, witness)
if err != nil {
t.Fatalf("unable to add witness: %v", err)
}
// With the witness stored, we'll now attempt to look it up. We should
// get back the *exact* same witness as we originally stored.
dbWitness, err := wCache.LookupWitness(Sha256HashWitness, witnessKey[:])
if err != nil {
t.Fatalf("unable to look up witness: %v", err)
}
if !reflect.DeepEqual(witness, dbWitness[:]) {
t.Fatalf("witnesses don't match: expected %x, got %x",
witness[:], dbWitness[:])
}
}
// TestWitnessCacheDeletion tests that we're able to delete a single witness,
// and also a class of witnesses from the cache.
func TestWitnessCacheDeletion(t *testing.T) {
t.Parallel()
cdb, cleanUp, err := makeTestDB()
if err != nil {
t.Fatalf("unable to make test database: %v", err)
}
defer cleanUp()
wCache := cdb.NewWitnessCache()
// We'll start by adding two witnesses to the cache.
witness1 := rev[:]
witness1Key := sha256.Sum256(witness1)
if err := wCache.AddWitness(Sha256HashWitness, witness1); err != nil {
t.Fatalf("unable to add witness: %v", err)
}
witness2 := key[:]
witness2Key := sha256.Sum256(witness2)
if err := wCache.AddWitness(Sha256HashWitness, witness2); err != nil {
t.Fatalf("unable to add witness: %v", err)
}
// We'll now delete the first witness. If we attempt to look it up, we
// should get ErrNoWitnesses.
err = wCache.DeleteWitness(Sha256HashWitness, witness1Key[:])
if err != nil {
t.Fatalf("unable to delete witness: %v", err)
}
_, err = wCache.LookupWitness(Sha256HashWitness, witness1Key[:])
if err != ErrNoWitnesses {
t.Fatalf("expected ErrNoWitnesses instead got: %v", err)
}
// Next, we'll attempt to delete the entire witness class itself. When
// we try to lookup the second witness, we should again get
// ErrNoWitnesses.
if err := wCache.DeleteWitnessClass(Sha256HashWitness); err != nil {
t.Fatalf("unable to delete witness class: %v", err)
}
_, err = wCache.LookupWitness(Sha256HashWitness, witness2Key[:])
if err != ErrNoWitnesses {
t.Fatalf("expected ErrNoWitnesses instead got: %v", err)
}
}
// TestWitnessCacheUnknownWitness tests that we get an error if we attempt to
// query/add/delete an unknown witness.
func TestWitnessCacheUnknownWitness(t *testing.T) {
t.Parallel()
cdb, cleanUp, err := makeTestDB()
if err != nil {
t.Fatalf("unable to make test database: %v", err)
}
defer cleanUp()
wCache := cdb.NewWitnessCache()
// We'll attempt to add a new, undefined witness type to the database.
// We should get an error.
err = wCache.AddWitness(234, key[:])
if err != ErrUnknownWitnessType {
t.Fatalf("expected ErrUnknownWitnessType, got %v", err)
}
}