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tree_test.go
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tree_test.go
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// nolint:errcheck
package iavl
import (
"bytes"
"encoding/hex"
"flag"
"fmt"
"math/rand"
"os"
"runtime"
"strconv"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
db "github.com/tendermint/tm-db"
iavlrand "github.com/cosmos/iavl/internal/rand"
)
var testLevelDB bool
var testFuzzIterations int
var random *iavlrand.Rand
func SetupTest() {
random = iavlrand.NewRand()
random.Seed(0) // for determinism
flag.BoolVar(&testLevelDB, "test.leveldb", false, "test leveldb backend")
flag.IntVar(&testFuzzIterations, "test.fuzz-iterations", 100000, "number of fuzz testing iterations")
flag.Parse()
}
func getTestDB() (db.DB, func()) {
if testLevelDB {
d, err := db.NewGoLevelDB("test", ".")
if err != nil {
panic(err)
}
return d, func() {
d.Close()
os.RemoveAll("./test.db")
}
}
return db.NewMemDB(), func() {}
}
func TestVersionedRandomTree(t *testing.T) {
require := require.New(t)
SetupTest()
d, closeDB := getTestDB()
defer closeDB()
tree, err := NewMutableTree(d, 100, false)
require.NoError(err)
versions := 50
keysPerVersion := 30
// Create a tree of size 1000 with 100 versions.
for i := 1; i <= versions; i++ {
for j := 0; j < keysPerVersion; j++ {
k := []byte(iavlrand.RandStr(8))
v := []byte(iavlrand.RandStr(8))
tree.Set(k, v)
}
tree.SaveVersion()
}
roots, err := tree.ndb.getRoots()
require.NoError(err)
require.Equal(versions, len(roots), "wrong number of roots")
leafNodes, err := tree.ndb.leafNodes()
require.Nil(err)
require.Equal(versions*keysPerVersion, len(leafNodes), "wrong number of nodes")
// Before deleting old versions, we should have equal or more nodes in the
// db than in the current tree version.
nodes, err := tree.ndb.nodes()
require.Nil(err)
require.True(len(nodes) >= tree.ImmutableTree().nodeSize())
// Ensure it returns all versions in sorted order
available := tree.AvailableVersions()
assert.Equal(t, versions, len(available))
assert.Equal(t, 1, available[0])
assert.Equal(t, versions, available[len(available)-1])
for i := 1; i < versions; i++ {
tree.DeleteVersion(int64(i))
}
require.Len(tree.versions, 1, "tree must have one version left")
tr, err := tree.GetImmutable(int64(versions))
require.NoError(err, "GetImmutable should not error for version %d", versions)
require.Equal(tr.root, tree.ImmutableTree().root)
// we should only have one available version now
available = tree.AvailableVersions()
assert.Equal(t, 1, len(available))
assert.Equal(t, versions, available[0])
// After cleaning up all previous versions, we should have as many nodes
// in the db as in the current tree version.
leafNodes, err = tree.ndb.leafNodes()
require.Nil(err)
require.Len(leafNodes, int(tree.ImmutableTree().Size()))
nodes, err = tree.ndb.nodes()
require.Nil(err)
require.Equal(tree.ImmutableTree().nodeSize(), len(nodes))
}
// nolint: dupl
func TestTreeHash(t *testing.T) {
const (
randSeed = 49872768940 // For deterministic tests
keySize = 16
valueSize = 16
versions = 4 // number of versions to generate
versionOps = 4096 // number of operations (create/update/delete) per version
updateRatio = 0.4 // ratio of updates out of all operations
deleteRatio = 0.2 // ratio of deletes out of all operations
)
// expected hashes for each version
expectHashes := []string{
"58ec30fa27f338057e5964ed9ec3367e59b2b54bec4c194f10fde7fed16c2a1c",
"91ad3ace227372f0064b2d63e8493ce8f4bdcbd16c7a8e4f4d54029c9db9570c",
"92c25dce822c5968c228cfe7e686129ea281f79273d4a8fcf6f9130a47aa5421",
"e44d170925554f42e00263155c19574837a38e3efed8910daccc7fa12f560fa0",
}
require.Len(t, expectHashes, versions, "must have expected hashes for all versions")
r := rand.New(rand.NewSource(randSeed))
tree, err := NewMutableTree(db.NewMemDB(), 0, false)
require.NoError(t, err)
keys := make([][]byte, 0, versionOps)
for i := 0; i < versions; i++ {
for j := 0; j < versionOps; j++ {
key := make([]byte, keySize)
value := make([]byte, valueSize)
// The performance of this is likely to be terrible, but that's fine for small tests
switch {
case len(keys) > 0 && r.Float64() <= deleteRatio:
index := r.Intn(len(keys))
key = keys[index]
keys = append(keys[:index], keys[index+1:]...)
_, removed, err := tree.Remove(key)
require.NoError(t, err)
require.True(t, removed)
case len(keys) > 0 && r.Float64() <= updateRatio:
key = keys[r.Intn(len(keys))]
r.Read(value)
updated, err := tree.Set(key, value)
require.NoError(t, err)
require.True(t, updated)
default:
r.Read(key)
r.Read(value)
// If we get an update, set again
for updated, err := tree.Set(key, value); err == nil && updated; {
key = make([]byte, keySize)
r.Read(key)
}
keys = append(keys, key)
}
}
hash, version, err := tree.SaveVersion()
require.NoError(t, err)
require.EqualValues(t, i+1, version)
require.Equal(t, expectHashes[i], hex.EncodeToString(hash))
}
require.EqualValues(t, versions, tree.Version())
}
func TestVersionedRandomTreeSmallKeys(t *testing.T) {
require := require.New(t)
d, closeDB := getTestDB()
defer closeDB()
tree, err := NewMutableTree(d, 100, false)
require.NoError(err)
singleVersionTree, err := getTestTree(0)
require.NoError(err)
versions := 20
keysPerVersion := 50
for i := 1; i <= versions; i++ {
for j := 0; j < keysPerVersion; j++ {
// Keys of size one are likely to be overwritten.
k := []byte(iavlrand.RandStr(1))
v := []byte(iavlrand.RandStr(8))
tree.Set(k, v)
singleVersionTree.Set(k, v)
}
tree.SaveVersion()
}
singleVersionTree.SaveVersion()
for i := 1; i < versions; i++ {
tree.DeleteVersion(int64(i))
}
// After cleaning up all previous versions, we should have as many nodes
// in the db as in the current tree version. The simple tree must be equal
// too.
leafNodes, err := tree.ndb.leafNodes()
require.Nil(err)
nodes, err := tree.ndb.nodes()
require.Nil(err)
require.Len(leafNodes, int(tree.ImmutableTree().Size()))
require.Len(nodes, tree.ImmutableTree().nodeSize())
require.Len(nodes, singleVersionTree.ImmutableTree().nodeSize())
// Try getting random keys.
for i := 0; i < keysPerVersion; i++ {
val, err := tree.Get([]byte(iavlrand.RandStr(1)))
require.NoError(err)
require.NotNil(val)
require.NotEmpty(val)
}
}
func TestVersionedRandomTreeSmallKeysRandomDeletes(t *testing.T) {
require := require.New(t)
d, closeDB := getTestDB()
defer closeDB()
tree, err := NewMutableTree(d, 100, false)
require.NoError(err)
singleVersionTree, err := getTestTree(0)
require.NoError(err)
versions := 30
keysPerVersion := 50
for i := 1; i <= versions; i++ {
for j := 0; j < keysPerVersion; j++ {
// Keys of size one are likely to be overwritten.
k := []byte(iavlrand.RandStr(1))
v := []byte(iavlrand.RandStr(8))
tree.Set(k, v)
singleVersionTree.Set(k, v)
}
tree.SaveVersion()
}
singleVersionTree.SaveVersion()
for _, i := range iavlrand.RandPerm(versions - 1) {
tree.DeleteVersion(int64(i + 1))
}
// After cleaning up all previous versions, we should have as many nodes
// in the db as in the current tree version. The simple tree must be equal
// too.
leafNodes, err := tree.ndb.leafNodes()
require.Nil(err)
nodes, err := tree.ndb.nodes()
require.Nil(err)
require.Len(leafNodes, int(tree.ImmutableTree().Size()))
require.Len(nodes, tree.ImmutableTree().nodeSize())
require.Len(nodes, singleVersionTree.ImmutableTree().nodeSize())
// Try getting random keys.
for i := 0; i < keysPerVersion; i++ {
val, err := tree.Get([]byte(iavlrand.RandStr(1)))
require.NoError(err)
require.NotNil(val)
require.NotEmpty(val)
}
}
func TestVersionedTreeSpecial1(t *testing.T) {
tree, err := getTestTree(100)
require.NoError(t, err)
tree.Set([]byte("C"), []byte("so43QQFN"))
tree.SaveVersion()
tree.Set([]byte("A"), []byte("ut7sTTAO"))
tree.SaveVersion()
tree.Set([]byte("X"), []byte("AoWWC1kN"))
tree.SaveVersion()
tree.Set([]byte("T"), []byte("MhkWjkVy"))
tree.SaveVersion()
tree.DeleteVersion(1)
tree.DeleteVersion(2)
tree.DeleteVersion(3)
nodes, err := tree.ndb.nodes()
require.Nil(t, err)
require.Equal(t, tree.ImmutableTree().nodeSize(), len(nodes))
}
func TestVersionedRandomTreeSpecial2(t *testing.T) {
require := require.New(t)
tree, err := getTestTree(100)
require.NoError(err)
tree.Set([]byte("OFMe2Yvm"), []byte("ez2OtQtE"))
tree.Set([]byte("WEN4iN7Y"), []byte("kQNyUalI"))
tree.SaveVersion()
tree.Set([]byte("1yY3pXHr"), []byte("udYznpII"))
tree.Set([]byte("7OSHNE7k"), []byte("ff181M2d"))
tree.SaveVersion()
tree.DeleteVersion(1)
nodes, err := tree.ndb.nodes()
require.NoError(err)
require.Len(nodes, tree.ImmutableTree().nodeSize())
}
func TestVersionedEmptyTree(t *testing.T) {
require := require.New(t)
d, closeDB := getTestDB()
defer closeDB()
tree, err := NewMutableTree(d, 0, false)
require.NoError(err)
hash, v, err := tree.SaveVersion()
require.NoError(err)
require.Equal("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", hex.EncodeToString(hash))
require.EqualValues(1, v)
hash, v, err = tree.SaveVersion()
require.NoError(err)
require.Equal("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", hex.EncodeToString(hash))
require.EqualValues(2, v)
hash, v, err = tree.SaveVersion()
require.NoError(err)
require.Equal("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", hex.EncodeToString(hash))
require.EqualValues(3, v)
hash, v, err = tree.SaveVersion()
require.NoError(err)
require.Equal("e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", hex.EncodeToString(hash))
require.EqualValues(4, v)
require.EqualValues(4, tree.Version())
require.True(tree.VersionExists(1))
require.True(tree.VersionExists(3))
require.NoError(tree.DeleteVersion(1))
require.NoError(tree.DeleteVersion(3))
require.False(tree.VersionExists(1))
require.False(tree.VersionExists(3))
tree.Set([]byte("k"), []byte("v"))
require.EqualValues(5, tree.ImmutableTree().root.version)
// Now reload the tree.
tree, err = NewMutableTree(d, 0, false)
require.NoError(err)
tree.Load()
require.False(tree.VersionExists(1))
require.True(tree.VersionExists(2))
require.False(tree.VersionExists(3))
t2, err := tree.GetImmutable(2)
require.NoError(err, "GetImmutable should not fail for version 2")
require.Empty(t2.root)
}
func TestVersionedTree(t *testing.T) {
require := require.New(t)
d, closeDB := getTestDB()
defer closeDB()
tree, err := NewMutableTree(d, 0, false)
require.NoError(err)
// We start with empty database.
require.Equal(0, tree.ndb.size())
require.True(tree.IsEmpty())
require.False(tree.ImmutableTree().IsFastCacheEnabled())
// version 0
tree.Set([]byte("key1"), []byte("val0"))
tree.Set([]byte("key2"), []byte("val0"))
// Still zero keys, since we haven't written them.
nodes, err := tree.ndb.leafNodes()
require.NoError(err)
require.Len(nodes, 0)
require.False(tree.IsEmpty())
// Now let's write the keys to storage.
hash1, v, err := tree.SaveVersion()
require.NoError(err)
require.False(tree.IsEmpty())
require.EqualValues(1, v)
// -----1-----
// key1 = val0 version=1
// key2 = val0 version=1
// key2 (root) version=1
// -----------
nodes1, err := tree.ndb.leafNodes()
require.NoError(err)
require.Len(nodes1, 2, "db should have a size of 2")
// version 1
tree.Set([]byte("key1"), []byte("val1"))
tree.Set([]byte("key2"), []byte("val1"))
tree.Set([]byte("key3"), []byte("val1"))
nodes, err = tree.ndb.leafNodes()
require.NoError(err)
require.Len(nodes, len(nodes1))
hash2, v2, err := tree.SaveVersion()
require.NoError(err)
require.False(bytes.Equal(hash1, hash2))
require.EqualValues(v+1, v2)
// Recreate a new tree and load it, to make sure it works in this
// scenario.
tree, err = NewMutableTree(d, 100, false)
require.NoError(err)
_, err = tree.Load()
require.NoError(err)
require.Len(tree.versions, 2, "wrong number of versions")
require.EqualValues(v2, tree.Version())
// -----1-----
// key1 = val0 <orphaned>
// key2 = val0 <orphaned>
// -----2-----
// key1 = val1
// key2 = val1
// key3 = val1
// -----------
nodes2, err := tree.ndb.leafNodes()
require.NoError(err)
require.Len(nodes2, 5, "db should have grown in size")
orphans, err := tree.ndb.orphans()
require.NoError(err)
require.Len(orphans, 3, "db should have three orphans")
// Create three more orphans.
tree.Remove([]byte("key1")) // orphans both leaf node and inner node containing "key1" and "key2"
tree.Set([]byte("key2"), []byte("val2"))
hash3, v3, _ := tree.SaveVersion()
require.EqualValues(3, v3)
// -----1-----
// key1 = val0 <orphaned> (replaced)
// key2 = val0 <orphaned> (replaced)
// -----2-----
// key1 = val1 <orphaned> (removed)
// key2 = val1 <orphaned> (replaced)
// key3 = val1
// -----3-----
// key2 = val2
// -----------
nodes3, err := tree.ndb.leafNodes()
require.NoError(err)
require.Len(nodes3, 6, "wrong number of nodes")
orphans, err = tree.ndb.orphans()
require.NoError(err)
require.Len(orphans, 7, "wrong number of orphans")
hash4, _, _ := tree.SaveVersion()
require.EqualValues(hash3, hash4)
require.NotNil(hash4)
tree, err = NewMutableTree(d, 100, false)
require.NoError(err)
_, err = tree.Load()
require.NoError(err)
// ------------
// DB UNCHANGED
// ------------
nodes4, err := tree.ndb.leafNodes()
require.NoError(err)
require.Len(nodes4, len(nodes3), "db should not have changed in size")
tree.Set([]byte("key1"), []byte("val0"))
// "key2"
val, err := tree.GetVersioned([]byte("key2"), 0)
require.NoError(err)
require.Nil(val)
val, err = tree.GetVersioned([]byte("key2"), 1)
require.NoError(err)
require.Equal("val0", string(val))
val, err = tree.GetVersioned([]byte("key2"), 2)
require.NoError(err)
require.Equal("val1", string(val))
val, err = tree.Get([]byte("key2"))
require.NoError(err)
require.Equal("val2", string(val))
// "key1"
val, err = tree.GetVersioned([]byte("key1"), 1)
require.NoError(err)
require.Equal("val0", string(val))
val, err = tree.GetVersioned([]byte("key1"), 2)
require.NoError(err)
require.Equal("val1", string(val))
val, err = tree.GetVersioned([]byte("key1"), 3)
require.NoError(err)
require.Nil(val)
val, err = tree.GetVersioned([]byte("key1"), 4)
require.NoError(err)
require.Nil(val)
val, err = tree.Get([]byte("key1"))
require.NoError(err)
require.Equal("val0", string(val))
// "key3"
val, err = tree.GetVersioned([]byte("key3"), 0)
require.NoError(err)
require.Nil(val)
val, err = tree.GetVersioned([]byte("key3"), 2)
require.NoError(err)
require.Equal("val1", string(val))
val, err = tree.GetVersioned([]byte("key3"), 3)
require.NoError(err)
require.Equal("val1", string(val))
// Delete a version. After this the keys in that version should not be found.
tree.DeleteVersion(2)
// -----1-----
// key1 = val0
// key2 = val0
// -----2-----
// key3 = val1
// -----3-----
// key2 = val2
// -----------
nodes5, err := tree.ndb.leafNodes()
require.NoError(err)
require.True(len(nodes5) < len(nodes4), "db should have shrunk after delete %d !< %d", len(nodes5), len(nodes4))
val, err = tree.GetVersioned([]byte("key2"), 2)
require.Nil(val)
val, err = tree.GetVersioned([]byte("key3"), 2)
require.Nil(val)
// But they should still exist in the latest version.
val, err = tree.Get([]byte("key2"))
require.NoError(err)
require.Equal("val2", string(val))
val, err = tree.Get([]byte("key3"))
require.NoError(err)
require.Equal("val1", string(val))
// Version 1 should still be available.
val, err = tree.GetVersioned([]byte("key1"), 1)
require.NoError(err)
require.Equal("val0", string(val))
val, err = tree.GetVersioned([]byte("key2"), 1)
require.NoError(err)
require.Equal("val0", string(val))
}
func TestVersionedTreeVersionDeletingEfficiency(t *testing.T) {
d, closeDB := getTestDB()
defer closeDB()
tree, err := NewMutableTree(d, 0, false)
require.NoError(t, err)
tree.Set([]byte("key0"), []byte("val0"))
tree.Set([]byte("key1"), []byte("val0"))
tree.Set([]byte("key2"), []byte("val0"))
tree.SaveVersion()
leafNodes, err := tree.ndb.leafNodes()
require.Nil(t, err)
require.Len(t, leafNodes, 3)
tree.Set([]byte("key1"), []byte("val1"))
tree.Set([]byte("key2"), []byte("val1"))
tree.Set([]byte("key3"), []byte("val1"))
tree.SaveVersion()
leafNodes, err = tree.ndb.leafNodes()
require.Nil(t, err)
require.Len(t, leafNodes, 6)
tree.Set([]byte("key0"), []byte("val2"))
tree.Remove([]byte("key1"))
tree.Set([]byte("key2"), []byte("val2"))
tree.SaveVersion()
leafNodes, err = tree.ndb.leafNodes()
require.Nil(t, err)
require.Len(t, leafNodes, 8)
tree.DeleteVersion(2)
leafNodes, err = tree.ndb.leafNodes()
require.Nil(t, err)
require.Len(t, leafNodes, 6)
tree.DeleteVersion(1)
leafNodes, err = tree.ndb.leafNodes()
require.Nil(t, err)
require.Len(t, leafNodes, 3)
tree2, err := getTestTree(0)
require.NoError(t, err)
tree2.Set([]byte("key0"), []byte("val2"))
tree2.Set([]byte("key2"), []byte("val2"))
tree2.Set([]byte("key3"), []byte("val1"))
tree2.SaveVersion()
require.Equal(t, tree2.ImmutableTree().nodeSize(), tree.ImmutableTree().nodeSize())
}
func TestVersionedTreeOrphanDeleting(t *testing.T) {
tree, err := getTestTree(0)
require.NoError(t, err)
tree.Set([]byte("key0"), []byte("val0"))
tree.Set([]byte("key1"), []byte("val0"))
tree.Set([]byte("key2"), []byte("val0"))
tree.SaveVersion()
tree.Set([]byte("key1"), []byte("val1"))
tree.Set([]byte("key2"), []byte("val1"))
tree.Set([]byte("key3"), []byte("val1"))
tree.SaveVersion()
tree.Set([]byte("key0"), []byte("val2"))
tree.Remove([]byte("key1"))
tree.Set([]byte("key2"), []byte("val2"))
tree.SaveVersion()
tree.DeleteVersion(2)
val, err := tree.Get([]byte("key0"))
require.NoError(t, err)
require.Equal(t, val, []byte("val2"))
val, err = tree.Get([]byte("key1"))
require.NoError(t, err)
require.Nil(t, val)
val, err = tree.Get([]byte("key2"))
require.NoError(t, err)
require.Equal(t, val, []byte("val2"))
val, err = tree.Get([]byte("key3"))
require.NoError(t, err)
require.Equal(t, val, []byte("val1"))
tree.DeleteVersion(1)
leafNodes, err := tree.ndb.leafNodes()
require.Nil(t, err)
require.Len(t, leafNodes, 3)
}
func TestVersionedTreeSpecialCase(t *testing.T) {
require := require.New(t)
d, closeDB := getTestDB()
defer closeDB()
tree, err := NewMutableTree(d, 0, false)
require.NoError(err)
tree.Set([]byte("key1"), []byte("val0"))
tree.Set([]byte("key2"), []byte("val0"))
tree.SaveVersion()
tree.Set([]byte("key1"), []byte("val1"))
tree.Set([]byte("key2"), []byte("val1"))
tree.SaveVersion()
tree.Set([]byte("key2"), []byte("val2"))
tree.SaveVersion()
tree.DeleteVersion(2)
val, err := tree.GetVersioned([]byte("key2"), 1)
require.NoError(err)
require.Equal("val0", string(val))
}
func TestVersionedTreeSpecialCase2(t *testing.T) {
require := require.New(t)
d := db.NewMemDB()
tree, err := NewMutableTree(d, 100, false)
require.NoError(err)
tree.Set([]byte("key1"), []byte("val0"))
tree.Set([]byte("key2"), []byte("val0"))
tree.SaveVersion()
tree.Set([]byte("key1"), []byte("val1"))
tree.Set([]byte("key2"), []byte("val1"))
tree.SaveVersion()
tree.Set([]byte("key2"), []byte("val2"))
tree.SaveVersion()
tree, err = NewMutableTree(d, 100, false)
require.NoError(err)
_, err = tree.Load()
require.NoError(err)
require.NoError(tree.DeleteVersion(2))
val, err := tree.GetVersioned([]byte("key2"), 1)
require.NoError(err)
require.Equal("val0", string(val))
}
func TestVersionedTreeSpecialCase3(t *testing.T) {
require := require.New(t)
tree, err := getTestTree(0)
require.NoError(err)
tree.Set([]byte("m"), []byte("liWT0U6G"))
tree.Set([]byte("G"), []byte("7PxRXwUA"))
tree.SaveVersion()
tree.Set([]byte("7"), []byte("XRLXgf8C"))
tree.SaveVersion()
tree.Set([]byte("r"), []byte("bBEmIXBU"))
tree.SaveVersion()
tree.Set([]byte("i"), []byte("kkIS35te"))
tree.SaveVersion()
tree.Set([]byte("k"), []byte("CpEnpzKJ"))
tree.SaveVersion()
tree.DeleteVersion(1)
tree.DeleteVersion(2)
tree.DeleteVersion(3)
tree.DeleteVersion(4)
nodes, err := tree.ndb.nodes()
require.NoError(err)
require.Equal(tree.ImmutableTree().nodeSize(), len(nodes))
}
func TestVersionedTreeSaveAndLoad(t *testing.T) {
require := require.New(t)
d := db.NewMemDB()
tree, err := NewMutableTree(d, 0, false)
require.NoError(err)
// Loading with an empty root is a no-op.
tree.Load()
tree.Set([]byte("C"), []byte("so43QQFN"))
tree.SaveVersion()
tree.Set([]byte("A"), []byte("ut7sTTAO"))
tree.SaveVersion()
tree.Set([]byte("X"), []byte("AoWWC1kN"))
tree.SaveVersion()
tree.SaveVersion()
tree.SaveVersion()
tree.SaveVersion()
preHash, err := tree.Hash()
require.NoError(err)
require.NotNil(preHash)
require.Equal(int64(6), tree.Version())
// Reload the tree, to test that roots and orphans are properly loaded.
ntree, err := NewMutableTree(d, 0, false)
require.NoError(err)
ntree.Load()
require.False(ntree.IsEmpty())
require.Equal(int64(6), ntree.Version())
postHash, err := ntree.Hash()
require.NoError(err)
require.Equal(preHash, postHash)
ntree.Set([]byte("T"), []byte("MhkWjkVy"))
ntree.SaveVersion()
ntree.DeleteVersion(6)
ntree.DeleteVersion(5)
ntree.DeleteVersion(1)
ntree.DeleteVersion(2)
ntree.DeleteVersion(4)
ntree.DeleteVersion(3)
require.False(ntree.IsEmpty())
require.Equal(int64(4), ntree.ImmutableTree().Size())
nodes, err := tree.ndb.nodes()
require.NoError(err)
require.Len(nodes, ntree.ImmutableTree().nodeSize())
}
func TestVersionedTreeErrors(t *testing.T) {
require := require.New(t)
tree, err := getTestTree(100)
require.NoError(err)
// Can't delete non-existent versions.
require.Error(tree.DeleteVersion(1))
require.Error(tree.DeleteVersion(99))
tree.Set([]byte("key"), []byte("val"))
// Saving with content is ok.
_, _, err = tree.SaveVersion()
require.NoError(err)
// Can't delete current version.
require.Error(tree.DeleteVersion(1))
// Trying to get a key from a version which doesn't exist.
val, err := tree.GetVersioned([]byte("key"), 404)
require.NoError(err)
require.Nil(val)
// Same thing with proof. We get an error because a proof couldn't be
// constructed.
val, proof, err := tree.GetVersionedWithProof([]byte("key"), 404)
require.Nil(val)
require.Empty(proof)
require.Error(err)
}
func TestVersionedCheckpoints(t *testing.T) {
require := require.New(t)
d, closeDB := getTestDB()
defer closeDB()
tree, err := NewMutableTree(d, 100, false)
require.NoError(err)
versions := 50
keysPerVersion := 10
versionsPerCheckpoint := 5
keys := map[int64]([][]byte){}
for i := 1; i <= versions; i++ {
for j := 0; j < keysPerVersion; j++ {
k := []byte(iavlrand.RandStr(1))
v := []byte(iavlrand.RandStr(8))
keys[int64(i)] = append(keys[int64(i)], k)
tree.Set(k, v)
}
_, _, err = tree.SaveVersion()
require.NoError(err, "failed to save version")
}
for i := 1; i <= versions; i++ {
if i%versionsPerCheckpoint != 0 {
err = tree.DeleteVersion(int64(i))
require.NoError(err, "failed to delete")
}
}
// Make sure all keys exist at least once.
for _, ks := range keys {
for _, k := range ks {
val, err := tree.Get(k)
require.NoError(err)
require.NotEmpty(val)
}
}
// Make sure all keys from deleted versions aren't present.
for i := 1; i <= versions; i++ {
if i%versionsPerCheckpoint != 0 {
for _, k := range keys[int64(i)] {
val, err := tree.GetVersioned(k, int64(i))
require.NoError(err)
require.Nil(val)
}
}
}
// Make sure all keys exist at all checkpoints.
for i := 1; i <= versions; i++ {
for _, k := range keys[int64(i)] {
if i%versionsPerCheckpoint == 0 {
val, err := tree.GetVersioned(k, int64(i))
require.NoError(err)
require.NotEmpty(val)
}
}
}
}
func TestVersionedCheckpointsSpecialCase(t *testing.T) {
require := require.New(t)
tree, err := getTestTree(0)
require.NoError(err)
key := []byte("k")
tree.Set(key, []byte("val1"))
tree.SaveVersion()
// ...
tree.SaveVersion()
// ...
tree.SaveVersion()
// ...
// This orphans "k" at version 1.
tree.Set(key, []byte("val2"))
tree.SaveVersion()
// When version 1 is deleted, the orphans should move to the next
// checkpoint, which is version 10.
tree.DeleteVersion(1)
val, err := tree.GetVersioned(key, 2)
require.NotEmpty(val)
require.Equal([]byte("val1"), val)
}
func TestVersionedCheckpointsSpecialCase2(t *testing.T) {
tree, err := getTestTree(0)
require.NoError(t, err)
tree.Set([]byte("U"), []byte("XamDUtiJ"))
tree.Set([]byte("A"), []byte("UkZBuYIU"))
tree.Set([]byte("H"), []byte("7a9En4uw"))
tree.Set([]byte("V"), []byte("5HXU3pSI"))
tree.SaveVersion()
tree.Set([]byte("U"), []byte("Replaced"))
tree.Set([]byte("A"), []byte("Replaced"))
tree.SaveVersion()
tree.Set([]byte("X"), []byte("New"))
tree.SaveVersion()
tree.DeleteVersion(1)
tree.DeleteVersion(2)
}
func TestVersionedCheckpointsSpecialCase3(t *testing.T) {
tree, err := getTestTree(0)
require.NoError(t, err)
tree.Set([]byte("n"), []byte("2wUCUs8q"))
tree.Set([]byte("l"), []byte("WQ7mvMbc"))
tree.SaveVersion()
tree.Set([]byte("N"), []byte("ved29IqU"))
tree.Set([]byte("v"), []byte("01jquVXU"))