neoneo-go/pkg/core/mpt/batch_test.go

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package mpt
import (
"encoding/hex"
"fmt"
"testing"
"github.com/nspcc-dev/neo-go/pkg/core/storage"
"github.com/stretchr/testify/require"
)
func TestBatchAdd(t *testing.T) {
b := new(Batch)
b.Add([]byte{1}, []byte{2})
b.Add([]byte{2, 16}, []byte{3})
b.Add([]byte{2, 0}, []byte{4})
b.Add([]byte{0, 1}, []byte{5})
b.Add([]byte{2, 0}, []byte{6})
expected := []keyValue{
{[]byte{0, 0, 0, 1}, []byte{5}},
{[]byte{0, 1}, []byte{2}},
{[]byte{0, 2, 0, 0}, []byte{6}},
{[]byte{0, 2, 1, 0}, []byte{3}},
}
require.Equal(t, expected, b.kv)
}
type pairs = [][2][]byte
func testIncompletePut(t *testing.T, ps pairs, n int, tr1, tr2 *Trie) {
var b Batch
for i, p := range ps {
if i < n {
if p[1] == nil {
require.NoError(t, tr1.Delete(p[0]), "item %d", i)
} else {
require.NoError(t, tr1.Put(p[0], p[1]), "item %d", i)
}
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} else if i == n {
if p[1] == nil {
require.Error(t, tr1.Delete(p[0]), "item %d", i)
} else {
require.Error(t, tr1.Put(p[0], p[1]), "item %d", i)
}
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}
b.Add(p[0], p[1])
}
num, err := tr2.PutBatch(b)
if n == len(ps) {
require.NoError(t, err)
} else {
require.Error(t, err)
}
require.Equal(t, n, num)
require.Equal(t, tr1.StateRoot(), tr2.StateRoot())
t.Run("test restore", func(t *testing.T) {
tr2.Flush()
tr3 := NewTrie(NewHashNode(tr2.StateRoot()), false, storage.NewMemCachedStore(tr2.Store))
for _, p := range ps[:n] {
val, err := tr3.Get(p[0])
if p[1] == nil {
require.Error(t, err)
continue
}
require.NoError(t, err, "key: %s", hex.EncodeToString(p[0]))
require.Equal(t, p[1], val)
}
})
}
func testPut(t *testing.T, ps pairs, tr1, tr2 *Trie) {
testIncompletePut(t, ps, len(ps), tr1, tr2)
}
func TestTrie_PutBatchLeaf(t *testing.T) {
prepareLeaf := func(t *testing.T) (*Trie, *Trie) {
tr1 := NewTrie(EmptyNode{}, false, newTestStore())
tr2 := NewTrie(EmptyNode{}, false, newTestStore())
require.NoError(t, tr1.Put([]byte{0}, []byte("value")))
require.NoError(t, tr2.Put([]byte{0}, []byte("value")))
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return tr1, tr2
}
t.Run("remove", func(t *testing.T) {
tr1, tr2 := prepareLeaf(t)
var ps = pairs{{[]byte{0}, nil}}
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testPut(t, ps, tr1, tr2)
})
t.Run("empty value", func(t *testing.T) {
tr1, tr2 := prepareLeaf(t)
var ps = pairs{{[]byte{0}, []byte{}}}
testPut(t, ps, tr1, tr2)
})
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t.Run("replace", func(t *testing.T) {
tr1, tr2 := prepareLeaf(t)
var ps = pairs{{[]byte{0}, []byte("replace")}}
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testPut(t, ps, tr1, tr2)
})
t.Run("remove and replace", func(t *testing.T) {
tr1, tr2 := prepareLeaf(t)
var ps = pairs{
{[]byte{0}, nil},
{[]byte{0, 2}, []byte("replace2")},
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}
testPut(t, ps, tr1, tr2)
})
t.Run("empty value and replace", func(t *testing.T) {
tr1, tr2 := prepareLeaf(t)
var ps = pairs{
{[]byte{0}, []byte{}},
{[]byte{0, 2}, []byte("replace2")},
}
testPut(t, ps, tr1, tr2)
})
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}
func TestTrie_PutBatchExtension(t *testing.T) {
prepareExtension := func(t *testing.T) (*Trie, *Trie) {
tr1 := NewTrie(EmptyNode{}, false, newTestStore())
tr2 := NewTrie(EmptyNode{}, false, newTestStore())
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require.NoError(t, tr1.Put([]byte{1, 2}, []byte("value1")))
require.NoError(t, tr2.Put([]byte{1, 2}, []byte("value1")))
return tr1, tr2
}
t.Run("split, key len > 1", func(t *testing.T) {
tr1, tr2 := prepareExtension(t)
var ps = pairs{{[]byte{2, 3}, []byte("value2")}}
testPut(t, ps, tr1, tr2)
})
t.Run("split, key len = 1", func(t *testing.T) {
tr1, tr2 := prepareExtension(t)
var ps = pairs{{[]byte{1, 3}, []byte("value2")}}
testPut(t, ps, tr1, tr2)
})
t.Run("add to next", func(t *testing.T) {
tr1, tr2 := prepareExtension(t)
var ps = pairs{{[]byte{1, 2, 3}, []byte("value2")}}
testPut(t, ps, tr1, tr2)
})
t.Run("add to next with leaf", func(t *testing.T) {
tr1, tr2 := prepareExtension(t)
var ps = pairs{
{[]byte{0}, []byte("value3")},
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{[]byte{1, 2, 3}, []byte("value2")},
}
testPut(t, ps, tr1, tr2)
})
t.Run("remove value", func(t *testing.T) {
tr1, tr2 := prepareExtension(t)
var ps = pairs{{[]byte{1, 2}, nil}}
testPut(t, ps, tr1, tr2)
})
t.Run("empty value", func(t *testing.T) {
tr1, tr2 := prepareExtension(t)
var ps = pairs{{[]byte{1, 2}, []byte{}}}
testPut(t, ps, tr1, tr2)
})
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t.Run("add to next, merge extension", func(t *testing.T) {
tr1, tr2 := prepareExtension(t)
var ps = pairs{
{[]byte{1, 2}, nil},
{[]byte{1, 2, 3}, []byte("value2")},
}
testPut(t, ps, tr1, tr2)
})
}
func TestTrie_PutBatchBranch(t *testing.T) {
prepareBranch := func(t *testing.T) (*Trie, *Trie) {
tr1 := NewTrie(EmptyNode{}, false, newTestStore())
tr2 := NewTrie(EmptyNode{}, false, newTestStore())
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require.NoError(t, tr1.Put([]byte{0x00, 2}, []byte("value1")))
require.NoError(t, tr2.Put([]byte{0x00, 2}, []byte("value1")))
require.NoError(t, tr1.Put([]byte{0x10, 3}, []byte("value2")))
require.NoError(t, tr2.Put([]byte{0x10, 3}, []byte("value2")))
return tr1, tr2
}
t.Run("simple add", func(t *testing.T) {
tr1, tr2 := prepareBranch(t)
var ps = pairs{{[]byte{0x20, 4}, []byte("value3")}}
testPut(t, ps, tr1, tr2)
})
t.Run("remove 1, transform to extension", func(t *testing.T) {
tr1, tr2 := prepareBranch(t)
var ps = pairs{{[]byte{0x00, 2}, nil}}
testPut(t, ps, tr1, tr2)
t.Run("non-empty child is hash node", func(t *testing.T) {
tr1, tr2 := prepareBranch(t)
tr1.Flush()
tr1.Collapse(1)
tr2.Flush()
tr2.Collapse(1)
var ps = pairs{{[]byte{0x00, 2}, nil}}
testPut(t, ps, tr1, tr2)
require.IsType(t, (*ExtensionNode)(nil), tr1.root)
})
t.Run("non-empty child is last node", func(t *testing.T) {
tr1 := NewTrie(EmptyNode{}, false, newTestStore())
tr2 := NewTrie(EmptyNode{}, false, newTestStore())
require.NoError(t, tr1.Put([]byte{0x00, 2}, []byte("value1")))
require.NoError(t, tr2.Put([]byte{0x00, 2}, []byte("value1")))
require.NoError(t, tr1.Put([]byte{0x00}, []byte("value2")))
require.NoError(t, tr2.Put([]byte{0x00}, []byte("value2")))
tr1.Flush()
tr1.Collapse(1)
tr2.Flush()
tr2.Collapse(1)
var ps = pairs{{[]byte{0x00, 2}, nil}}
testPut(t, ps, tr1, tr2)
})
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})
t.Run("incomplete put, transform to extension", func(t *testing.T) {
tr1, tr2 := prepareBranch(t)
var ps = pairs{
{[]byte{0x00, 2}, nil},
{[]byte{0x20, 2}, nil},
{[]byte{0x30, 3}, []byte("won't be put")},
}
testIncompletePut(t, ps, 3, tr1, tr2)
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})
t.Run("incomplete put, transform to empty", func(t *testing.T) {
tr1, tr2 := prepareBranch(t)
var ps = pairs{
{[]byte{0x00, 2}, nil},
{[]byte{0x10, 3}, nil},
{[]byte{0x20, 2}, nil},
{[]byte{0x30, 3}, []byte("won't be put")},
}
testIncompletePut(t, ps, 4, tr1, tr2)
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})
t.Run("remove 2, become empty", func(t *testing.T) {
tr1, tr2 := prepareBranch(t)
var ps = pairs{
{[]byte{0x00, 2}, nil},
{[]byte{0x10, 3}, nil},
}
testPut(t, ps, tr1, tr2)
})
}
func TestTrie_PutBatchHash(t *testing.T) {
prepareHash := func(t *testing.T) (*Trie, *Trie) {
tr1 := NewTrie(EmptyNode{}, false, newTestStore())
tr2 := NewTrie(EmptyNode{}, false, newTestStore())
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require.NoError(t, tr1.Put([]byte{0x10}, []byte("value1")))
require.NoError(t, tr2.Put([]byte{0x10}, []byte("value1")))
require.NoError(t, tr1.Put([]byte{0x20}, []byte("value2")))
require.NoError(t, tr2.Put([]byte{0x20}, []byte("value2")))
tr1.Flush()
tr2.Flush()
return tr1, tr2
}
t.Run("good", func(t *testing.T) {
tr1, tr2 := prepareHash(t)
var ps = pairs{{[]byte{2}, []byte("value2")}}
tr1.Collapse(0)
tr1.Collapse(0)
testPut(t, ps, tr1, tr2)
})
t.Run("incomplete, second hash not found", func(t *testing.T) {
tr1, tr2 := prepareHash(t)
var ps = pairs{
{[]byte{0x10}, []byte("replace1")},
{[]byte{0x20}, []byte("replace2")},
}
tr1.Collapse(1)
tr2.Collapse(1)
key := makeStorageKey(tr1.root.(*BranchNode).Children[2].Hash().BytesBE())
require.NoError(t, tr1.Store.Delete(key))
require.NoError(t, tr2.Store.Delete(key))
testIncompletePut(t, ps, 1, tr1, tr2)
})
}
func TestTrie_PutBatchEmpty(t *testing.T) {
t.Run("good", func(t *testing.T) {
tr1 := NewTrie(EmptyNode{}, false, newTestStore())
tr2 := NewTrie(EmptyNode{}, false, newTestStore())
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var ps = pairs{
{[]byte{0}, []byte("value0")},
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{[]byte{1}, []byte("value1")},
{[]byte{3}, []byte("value3")},
}
testPut(t, ps, tr1, tr2)
})
t.Run("incomplete", func(t *testing.T) {
var ps = pairs{
{[]byte{0}, []byte("replace0")},
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{[]byte{1}, []byte("replace1")},
{[]byte{2}, nil},
{[]byte{3}, []byte("replace3")},
}
tr1 := NewTrie(EmptyNode{}, false, newTestStore())
tr2 := NewTrie(EmptyNode{}, false, newTestStore())
testIncompletePut(t, ps, 4, tr1, tr2)
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})
}
// For the sake of coverage.
func TestTrie_InvalidNodeType(t *testing.T) {
tr := NewTrie(EmptyNode{}, false, newTestStore())
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var b Batch
b.Add([]byte{1}, []byte("value"))
tr.root = Node(nil)
require.Panics(t, func() { _, _ = tr.PutBatch(b) })
}
func TestTrie_PutBatch(t *testing.T) {
tr1 := NewTrie(EmptyNode{}, false, newTestStore())
tr2 := NewTrie(EmptyNode{}, false, newTestStore())
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var ps = pairs{
{[]byte{1}, []byte{1}},
{[]byte{2}, []byte{3}},
{[]byte{4}, []byte{5}},
}
testPut(t, ps, tr1, tr2)
ps = pairs{[2][]byte{{4}, {6}}}
testPut(t, ps, tr1, tr2)
ps = pairs{[2][]byte{{4}, nil}}
testPut(t, ps, tr1, tr2)
testPut(t, pairs{}, tr1, tr2)
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}
var _ = printNode
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// This function is unused, but is helpful for debugging
// as it provides more readable Trie representation compared to
// `spew.Dump()`.
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func printNode(prefix string, n Node) {
switch tn := n.(type) {
case EmptyNode:
fmt.Printf("%s empty\n", prefix)
return
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case *HashNode:
fmt.Printf("%s %s\n", prefix, tn.Hash().StringLE())
case *BranchNode:
for i, c := range tn.Children {
if isEmpty(c) {
continue
}
fmt.Printf("%s [%2d] ->\n", prefix, i)
printNode(prefix+" ", c)
}
case *ExtensionNode:
fmt.Printf("%s extension-> %s\n", prefix, hex.EncodeToString(tn.key))
printNode(prefix+" ", tn.next)
case *LeafNode:
fmt.Printf("%s leaf-> %s\n", prefix, hex.EncodeToString(tn.value))
}
}