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map_test.go
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/*
* Atree - Scalable Arrays and Ordered Maps
*
* Copyright Flow Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package atree
import (
"errors"
"fmt"
"math"
"math/rand"
"reflect"
"runtime"
"sort"
"strings"
"testing"
"github.com/stretchr/testify/mock"
"github.com/stretchr/testify/require"
)
type mockDigesterBuilder struct {
mock.Mock
}
var _ DigesterBuilder = &mockDigesterBuilder{}
type mockDigester struct {
d []Digest
}
var _ Digester = &mockDigester{}
func (h *mockDigesterBuilder) SetSeed(_ uint64, _ uint64) {
}
func (h *mockDigesterBuilder) Digest(_ HashInputProvider, value Value) (Digester, error) {
args := h.Called(value)
return args.Get(0).(mockDigester), nil
}
func (d mockDigester) DigestPrefix(level uint) ([]Digest, error) {
if level > uint(len(d.d)) {
return nil, fmt.Errorf("digest level %d out of bounds", level)
}
return d.d[:level], nil
}
func (d mockDigester) Digest(level uint) (Digest, error) {
if level >= uint(len(d.d)) {
return 0, fmt.Errorf("digest level %d out of bounds", level)
}
return d.d[level], nil
}
func (d mockDigester) Levels() uint {
return uint(len(d.d))
}
func (d mockDigester) Reset() {}
type errorDigesterBuilder struct {
err error
}
var _ DigesterBuilder = &errorDigesterBuilder{}
func newErrorDigesterBuilder(err error) *errorDigesterBuilder {
return &errorDigesterBuilder{err: err}
}
func (h *errorDigesterBuilder) SetSeed(_ uint64, _ uint64) {
}
func (h *errorDigesterBuilder) Digest(_ HashInputProvider, _ Value) (Digester, error) {
return nil, h.err
}
func testEmptyMapV0(
t *testing.T,
storage *PersistentSlabStorage,
typeInfo TypeInfo,
address Address,
m *OrderedMap,
) {
testMapV0(t, storage, typeInfo, address, m, nil, nil, false)
}
func testEmptyMap(
t *testing.T,
storage *PersistentSlabStorage,
typeInfo TypeInfo,
address Address,
m *OrderedMap,
) {
testMap(t, storage, typeInfo, address, m, nil, nil, false)
}
func testMapV0(
t *testing.T,
storage *PersistentSlabStorage,
typeInfo TypeInfo,
address Address,
m *OrderedMap,
keyValues map[Value]Value,
sortedKeys []Value,
hasNestedArrayMapElement bool,
) {
_testMap(t, storage, typeInfo, address, m, keyValues, sortedKeys, hasNestedArrayMapElement, false)
}
func testMap(
t *testing.T,
storage *PersistentSlabStorage,
typeInfo TypeInfo,
address Address,
m *OrderedMap,
keyValues mapValue,
sortedKeys []Value,
hasNestedArrayMapElement bool,
) {
_testMap(t, storage, typeInfo, address, m, keyValues, sortedKeys, hasNestedArrayMapElement, true)
}
// _testMap verifies map elements and validates serialization and in-memory slab tree.
// It also verifies elements ordering if sortedKeys is not nil.
func _testMap(
t *testing.T,
storage *PersistentSlabStorage,
typeInfo TypeInfo,
address Address,
m *OrderedMap,
expectedKeyValues map[Value]Value,
sortedKeys []Value,
hasNestedArrayMapElement bool,
inlineEnabled bool,
) {
require.True(t, typeInfoComparator(typeInfo, m.Type()))
require.Equal(t, address, m.Address())
require.Equal(t, uint64(len(expectedKeyValues)), m.Count())
var err error
// Verify map elements
for k, expected := range expectedKeyValues {
actual, err := m.Get(compare, hashInputProvider, k)
require.NoError(t, err)
valueEqual(t, expected, actual)
}
// Verify map elements ordering
if len(sortedKeys) > 0 {
require.Equal(t, len(expectedKeyValues), len(sortedKeys))
i := 0
err = m.IterateReadOnly(func(k, v Value) (bool, error) {
expectedKey := sortedKeys[i]
expectedValue := expectedKeyValues[expectedKey]
valueEqual(t, expectedKey, k)
valueEqual(t, expectedValue, v)
i++
return true, nil
})
require.NoError(t, err)
require.Equal(t, len(expectedKeyValues), i)
}
// Verify in-memory slabs
err = VerifyMap(m, address, typeInfo, typeInfoComparator, hashInputProvider, inlineEnabled)
if err != nil {
PrintMap(m)
}
require.NoError(t, err)
// Verify slab serializations
err = VerifyMapSerialization(
m,
GetCBORDecMode(storage),
GetCBOREncMode(storage),
storage.DecodeStorable,
storage.DecodeTypeInfo,
func(a, b Storable) bool {
return reflect.DeepEqual(a, b)
},
)
if err != nil {
PrintMap(m)
}
require.NoError(t, err)
// Check storage slab tree
rootIDSet, err := CheckStorageHealth(storage, 1)
require.NoError(t, err)
rootIDs := make([]SlabID, 0, len(rootIDSet))
for id := range rootIDSet {
rootIDs = append(rootIDs, id)
}
require.Equal(t, 1, len(rootIDs))
require.Equal(t, m.SlabID(), rootIDs[0])
// Encode all non-nil slab
encodedSlabs := make(map[SlabID][]byte)
deltas := GetDeltas(storage)
for id, slab := range deltas {
if slab != nil {
b, err := EncodeSlab(slab, GetCBOREncMode(storage))
require.NoError(t, err)
encodedSlabs[id] = b
}
}
// Test decoded map from new storage to force slab decoding
decodedMap, err := NewMapWithRootID(
newTestPersistentStorageWithBaseStorageAndDeltas(t, GetBaseStorage(storage), encodedSlabs),
m.SlabID(),
GetMapDigesterBuilder(m))
require.NoError(t, err)
// Verify decoded map elements
for k, expected := range expectedKeyValues {
actual, err := decodedMap.Get(compare, hashInputProvider, k)
require.NoError(t, err)
valueEqual(t, expected, actual)
}
if !hasNestedArrayMapElement {
// Need to call Commit before calling storage.Count() for PersistentSlabStorage.
err = storage.Commit()
require.NoError(t, err)
stats, err := GetMapStats(m)
require.NoError(t, err)
require.Equal(t, stats.SlabCount(), uint64(storage.Count()))
if len(expectedKeyValues) == 0 {
// Verify slab count for empty map
require.Equal(t, uint64(1), stats.DataSlabCount)
require.Equal(t, uint64(0), stats.MetaDataSlabCount)
require.Equal(t, uint64(0), stats.StorableSlabCount)
require.Equal(t, uint64(0), stats.CollisionDataSlabCount)
}
}
}
type keysByDigest struct {
keys []Value
digesterBuilder DigesterBuilder
}
func (d keysByDigest) Len() int { return len(d.keys) }
func (d keysByDigest) Swap(i, j int) { d.keys[i], d.keys[j] = d.keys[j], d.keys[i] }
func (d keysByDigest) Less(i, j int) bool {
d1, err := d.digesterBuilder.Digest(hashInputProvider, d.keys[i])
if err != nil {
panic(err)
}
digest1, err := d1.DigestPrefix(d1.Levels())
if err != nil {
panic(err)
}
d2, err := d.digesterBuilder.Digest(hashInputProvider, d.keys[j])
if err != nil {
panic(err)
}
digest2, err := d2.DigestPrefix(d2.Levels())
if err != nil {
panic(err)
}
for z := 0; z < len(digest1); z++ {
if digest1[z] != digest2[z] {
return digest1[z] < digest2[z] // sort by hkey
}
}
return i < j // sort by insertion order with hash collision
}
func TestMapSetAndGet(t *testing.T) {
t.Run("unique keys", func(t *testing.T) {
// Map tree will be 4 levels, with ~35 metadata slabs, and ~270 data slabs when
// slab size is 256 bytes, number of map elements is 2048,
// keys are strings of 16 bytes of random content, values are 0-2048,
SetThreshold(256)
defer SetThreshold(1024)
const (
mapCount = 2048
keyStringSize = 16
)
r := newRand(t)
keyValues := make(map[Value]Value, mapCount)
i := uint64(0)
for len(keyValues) < mapCount {
k := NewStringValue(randStr(r, keyStringSize))
v := Uint64Value(i)
keyValues[k] = v
i++
}
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
m, err := NewMap(storage, address, NewDefaultDigesterBuilder(), typeInfo)
require.NoError(t, err)
for k, v := range keyValues {
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
testMap(t, storage, typeInfo, address, m, keyValues, nil, false)
})
t.Run("replicate keys", func(t *testing.T) {
SetThreshold(256)
defer SetThreshold(1024)
const (
mapCount = 2048
keyStringSize = 16
)
r := newRand(t)
keyValues := make(map[Value]Value, mapCount)
i := uint64(0)
for len(keyValues) < mapCount {
k := NewStringValue(randStr(r, keyStringSize))
v := Uint64Value(i)
keyValues[k] = v
i++
}
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
m, err := NewMap(storage, address, NewDefaultDigesterBuilder(), typeInfo)
require.NoError(t, err)
for k, v := range keyValues {
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
// Overwrite values
for k, v := range keyValues {
oldValue := v.(Uint64Value)
newValue := Uint64Value(uint64(oldValue) + mapCount)
existingStorable, err := m.Set(compare, hashInputProvider, k, newValue)
require.NoError(t, err)
require.NotNil(t, existingStorable)
existingValue, err := existingStorable.StoredValue(storage)
require.NoError(t, err)
valueEqual(t, oldValue, existingValue)
keyValues[k] = newValue
}
testMap(t, storage, typeInfo, address, m, keyValues, nil, false)
})
t.Run("random key and value", func(t *testing.T) {
SetThreshold(256)
defer SetThreshold(1024)
const (
mapCount = 2048
keyStringMaxSize = 1024
)
r := newRand(t)
keyValues := make(map[Value]Value, mapCount)
for len(keyValues) < mapCount {
slen := r.Intn(keyStringMaxSize)
k := NewStringValue(randStr(r, slen))
v := randomValue(r, int(MaxInlineMapElementSize()))
keyValues[k] = v
}
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
m, err := NewMap(storage, address, NewDefaultDigesterBuilder(), typeInfo)
require.NoError(t, err)
for k, v := range keyValues {
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
testMap(t, storage, typeInfo, address, m, keyValues, nil, false)
})
t.Run("unique keys with hash collision", func(t *testing.T) {
const (
mapCount = 1024
keyStringSize = 16
)
SetThreshold(256)
defer SetThreshold(1024)
savedMaxCollisionLimitPerDigest := MaxCollisionLimitPerDigest
MaxCollisionLimitPerDigest = uint32(math.Ceil(float64(mapCount) / 10))
defer func() {
MaxCollisionLimitPerDigest = savedMaxCollisionLimitPerDigest
}()
r := newRand(t)
digesterBuilder := &mockDigesterBuilder{}
keyValues := make(map[Value]Value, mapCount)
i := uint64(0)
for len(keyValues) < mapCount {
k := NewStringValue(randStr(r, keyStringSize))
v := Uint64Value(i)
keyValues[k] = v
i++
digests := []Digest{
Digest(i % 10),
}
digesterBuilder.On("Digest", k).Return(mockDigester{digests})
}
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
m, err := NewMap(storage, address, digesterBuilder, typeInfo)
require.NoError(t, err)
for k, v := range keyValues {
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
testMap(t, storage, typeInfo, address, m, keyValues, nil, false)
})
t.Run("replicate keys with hash collision", func(t *testing.T) {
const (
mapCount = 1024
keyStringSize = 16
)
SetThreshold(256)
defer SetThreshold(1024)
savedMaxCollisionLimitPerDigest := MaxCollisionLimitPerDigest
MaxCollisionLimitPerDigest = uint32(math.Ceil(float64(mapCount) / 10))
defer func() {
MaxCollisionLimitPerDigest = savedMaxCollisionLimitPerDigest
}()
r := newRand(t)
digesterBuilder := &mockDigesterBuilder{}
keyValues := make(map[Value]Value, mapCount)
i := uint64(0)
for len(keyValues) < mapCount {
k := NewStringValue(randStr(r, keyStringSize))
v := Uint64Value(i)
keyValues[k] = v
i++
digests := []Digest{
Digest(i % 10),
}
digesterBuilder.On("Digest", k).Return(mockDigester{digests})
}
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
m, err := NewMap(storage, address, digesterBuilder, typeInfo)
require.NoError(t, err)
for k, v := range keyValues {
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
// Overwrite values
for k, v := range keyValues {
oldValue := v.(Uint64Value)
newValue := Uint64Value(uint64(oldValue) + mapCount)
existingStorable, err := m.Set(compare, hashInputProvider, k, newValue)
require.NoError(t, err)
require.NotNil(t, existingStorable)
existingValue, err := existingStorable.StoredValue(storage)
require.NoError(t, err)
valueEqual(t, oldValue, existingValue)
keyValues[k] = newValue
}
testMap(t, storage, typeInfo, address, m, keyValues, nil, false)
})
}
func TestMapGetKeyNotFound(t *testing.T) {
t.Run("no collision", func(t *testing.T) {
const mapCount = 1024
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
m, err := NewMap(storage, address, NewDefaultDigesterBuilder(), typeInfo)
require.NoError(t, err)
keyValues := make(map[Value]Value, mapCount)
for i := 0; i < mapCount; i++ {
k := Uint64Value(i)
v := Uint64Value(i)
keyValues[k] = v
storable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, storable)
}
r := newRand(t)
k := NewStringValue(randStr(r, 1024))
storable, err := m.Get(compare, hashInputProvider, k)
require.Nil(t, storable)
require.Equal(t, 1, errorCategorizationCount(err))
var userError *UserError
var keyNotFoundError *KeyNotFoundError
require.ErrorAs(t, err, &userError)
require.ErrorAs(t, err, &keyNotFoundError)
require.ErrorAs(t, userError, &keyNotFoundError)
testMap(t, storage, typeInfo, address, m, keyValues, nil, false)
})
t.Run("collision", func(t *testing.T) {
const mapCount = 256
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
digesterBuilder := &mockDigesterBuilder{}
m, err := NewMap(storage, address, digesterBuilder, typeInfo)
require.NoError(t, err)
keyValues := make(map[Value]Value, mapCount)
for i := 0; i < mapCount; i++ {
k := Uint64Value(i)
v := Uint64Value(i)
keyValues[k] = v
digests := []Digest{Digest(i)}
digesterBuilder.On("Digest", k).Return(mockDigester{digests})
storable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, storable)
}
r := newRand(t)
k := NewStringValue(randStr(r, 1024))
digests := []Digest{Digest(0)}
digesterBuilder.On("Digest", k).Return(mockDigester{digests})
storable, err := m.Get(compare, hashInputProvider, k)
require.Nil(t, storable)
require.Equal(t, 1, errorCategorizationCount(err))
var userError *UserError
var keyNotFoundError *KeyNotFoundError
require.ErrorAs(t, err, &userError)
require.ErrorAs(t, err, &keyNotFoundError)
require.ErrorAs(t, userError, &keyNotFoundError)
testMap(t, storage, typeInfo, address, m, keyValues, nil, false)
})
t.Run("collision group", func(t *testing.T) {
const mapCount = 256
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
digesterBuilder := &mockDigesterBuilder{}
m, err := NewMap(storage, address, digesterBuilder, typeInfo)
require.NoError(t, err)
keyValues := make(map[Value]Value, mapCount)
for i := 0; i < mapCount; i++ {
k := Uint64Value(i)
v := Uint64Value(i)
keyValues[k] = v
digests := []Digest{Digest(i % 10)}
digesterBuilder.On("Digest", k).Return(mockDigester{digests})
storable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, storable)
}
r := newRand(t)
k := NewStringValue(randStr(r, 1024))
digests := []Digest{Digest(0)}
digesterBuilder.On("Digest", k).Return(mockDigester{digests})
storable, err := m.Get(compare, hashInputProvider, k)
require.Nil(t, storable)
require.Equal(t, 1, errorCategorizationCount(err))
var userError *UserError
var keyNotFoundError *KeyNotFoundError
require.ErrorAs(t, err, &userError)
require.ErrorAs(t, err, &keyNotFoundError)
require.ErrorAs(t, userError, &keyNotFoundError)
testMap(t, storage, typeInfo, address, m, keyValues, nil, false)
})
}
func TestMapHas(t *testing.T) {
t.Run("no error", func(t *testing.T) {
const (
mapCount = 2048
keyStringSize = 16
)
r := newRand(t)
keys := make(map[Value]bool, mapCount*2)
keysToInsert := make([]Value, 0, mapCount)
keysToNotInsert := make([]Value, 0, mapCount)
for len(keysToInsert) < mapCount || len(keysToNotInsert) < mapCount {
k := NewStringValue(randStr(r, keyStringSize))
if !keys[k] {
keys[k] = true
if len(keysToInsert) < mapCount {
keysToInsert = append(keysToInsert, k)
} else {
keysToNotInsert = append(keysToNotInsert, k)
}
}
}
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
m, err := NewMap(storage, address, NewDefaultDigesterBuilder(), typeInfo)
require.NoError(t, err)
for i, k := range keysToInsert {
existingStorable, err := m.Set(compare, hashInputProvider, k, Uint64Value(i))
require.NoError(t, err)
require.Nil(t, existingStorable)
}
for _, k := range keysToInsert {
exist, err := m.Has(compare, hashInputProvider, k)
require.NoError(t, err)
require.True(t, exist)
}
for _, k := range keysToNotInsert {
exist, err := m.Has(compare, hashInputProvider, k)
require.NoError(t, err)
require.False(t, exist)
}
})
t.Run("error", func(t *testing.T) {
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
testErr := errors.New("test")
digesterBuilder := newErrorDigesterBuilder(testErr)
m, err := NewMap(storage, address, digesterBuilder, typeInfo)
require.NoError(t, err)
exist, err := m.Has(compare, hashInputProvider, Uint64Value(0))
// err is testErr wrapped in ExternalError.
require.Equal(t, 1, errorCategorizationCount(err))
var externalError *ExternalError
require.ErrorAs(t, err, &externalError)
require.Equal(t, testErr, externalError.Unwrap())
require.False(t, exist)
})
}
func testMapRemoveElement(t *testing.T, m *OrderedMap, k Value, expectedV Value) {
removedKeyStorable, removedValueStorable, err := m.Remove(compare, hashInputProvider, k)
require.NoError(t, err)
removedKey, err := removedKeyStorable.StoredValue(m.Storage)
require.NoError(t, err)
valueEqual(t, k, removedKey)
removedValue, err := removedValueStorable.StoredValue(m.Storage)
require.NoError(t, err)
valueEqual(t, expectedV, removedValue)
if id, ok := removedKeyStorable.(SlabIDStorable); ok {
err = m.Storage.Remove(SlabID(id))
require.NoError(t, err)
}
if id, ok := removedValueStorable.(SlabIDStorable); ok {
err = m.Storage.Remove(SlabID(id))
require.NoError(t, err)
}
// Remove the same key for the second time.
removedKeyStorable, removedValueStorable, err = m.Remove(compare, hashInputProvider, k)
require.Equal(t, 1, errorCategorizationCount(err))
var userError *UserError
var keyNotFoundError *KeyNotFoundError
require.ErrorAs(t, err, &userError)
require.ErrorAs(t, err, &keyNotFoundError)
require.ErrorAs(t, userError, &keyNotFoundError)
require.Nil(t, removedKeyStorable)
require.Nil(t, removedValueStorable)
}
func TestMapRemove(t *testing.T) {
SetThreshold(512)
defer SetThreshold(1024)
const (
mapCount = 2048
smallKeyStringSize = 16
smallValueStringSize = 16
largeKeyStringSize = 512
largeValueStringSize = 512
)
r := newRand(t)
smallKeyValues := make(map[Value]Value, mapCount)
for len(smallKeyValues) < mapCount {
k := NewStringValue(randStr(r, smallKeyStringSize))
v := NewStringValue(randStr(r, smallValueStringSize))
smallKeyValues[k] = v
}
largeKeyValues := make(map[Value]Value, mapCount)
for len(largeKeyValues) < mapCount {
k := NewStringValue(randStr(r, largeKeyStringSize))
v := NewStringValue(randStr(r, largeValueStringSize))
largeKeyValues[k] = v
}
testCases := []struct {
name string
keyValues map[Value]Value
}{
{name: "small key and value", keyValues: smallKeyValues},
{name: "large key and value", keyValues: largeKeyValues},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
typeInfo := testTypeInfo{42}
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
storage := newTestPersistentStorage(t)
m, err := NewMap(storage, address, NewDefaultDigesterBuilder(), typeInfo)
require.NoError(t, err)
// Insert elements
for k, v := range tc.keyValues {
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
testMap(t, storage, typeInfo, address, m, tc.keyValues, nil, false)
count := len(tc.keyValues)
// Remove all elements
for k, v := range tc.keyValues {
testMapRemoveElement(t, m, k, v)
count--
require.True(t, typeInfoComparator(typeInfo, m.Type()))
require.Equal(t, address, m.Address())
require.Equal(t, uint64(count), m.Count())
}
testEmptyMap(t, storage, typeInfo, address, m)
})
}
t.Run("collision", func(t *testing.T) {
// Test:
// - data slab refers to an external slab containing elements with hash collision
// - last collision element is inlined after all other collision elements are removed
// - data slab overflows with inlined colllision element
// - data slab splits
SetThreshold(512)
defer SetThreshold(1024)
const (
numOfElementsBeforeCollision = 54
numOfElementsWithCollision = 10
numOfElementsAfterCollision = 1
)
digesterBuilder := &mockDigesterBuilder{}
typeInfo := testTypeInfo{42}
storage := newTestPersistentStorage(t)
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
r := newRand(t)
m, err := NewMap(storage, address, digesterBuilder, typeInfo)
require.NoError(t, err)
nextDigest := Digest(0)
nonCollisionKeyValues := make(map[Value]Value)
for i := 0; i < numOfElementsBeforeCollision; i++ {
k := Uint64Value(i)
v := Uint64Value(i)
nonCollisionKeyValues[k] = v
digesterBuilder.On("Digest", k).Return(mockDigester{d: []Digest{nextDigest}})
nextDigest++
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
collisionKeyValues := make(map[Value]Value)
for len(collisionKeyValues) < numOfElementsWithCollision {
k := NewStringValue(randStr(r, int(MaxInlineMapKeySize())-2))
v := NewStringValue(randStr(r, int(MaxInlineMapKeySize())-2))
collisionKeyValues[k] = v
digesterBuilder.On("Digest", k).Return(mockDigester{d: []Digest{nextDigest}})
}
for k, v := range collisionKeyValues {
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
nextDigest++
k := Uint64Value(nextDigest)
v := Uint64Value(nextDigest)
nonCollisionKeyValues[k] = v
digesterBuilder.On("Digest", k).Return(mockDigester{d: []Digest{nextDigest}})
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
count := len(nonCollisionKeyValues) + len(collisionKeyValues)
// Remove all collision elements
for k, v := range collisionKeyValues {
testMapRemoveElement(t, m, k, v)
count--
require.True(t, typeInfoComparator(typeInfo, m.Type()))
require.Equal(t, address, m.Address())
require.Equal(t, uint64(count), m.Count())
}
testMap(t, storage, typeInfo, address, m, nonCollisionKeyValues, nil, false)
// Remove remaining elements
for k, v := range nonCollisionKeyValues {
testMapRemoveElement(t, m, k, v)
count--
require.True(t, typeInfoComparator(typeInfo, m.Type()))
require.Equal(t, address, m.Address())
require.Equal(t, uint64(count), m.Count())
}
testEmptyMap(t, storage, typeInfo, address, m)
})
t.Run("collision with data root", func(t *testing.T) {
// Test:
// - data slab refers to an external slab containing elements with hash collision
// - last collision element is inlined after all other collision elements are removed
// - data slab overflows with inlined colllision element
// - data slab splits
SetThreshold(512)
defer SetThreshold(1024)
const (
numOfElementsWithCollision = 10
numOfElementsWithoutCollision = 35
)
digesterBuilder := &mockDigesterBuilder{}
typeInfo := testTypeInfo{42}
storage := newTestPersistentStorage(t)
address := Address{1, 2, 3, 4, 5, 6, 7, 8}
r := newRand(t)
m, err := NewMap(storage, address, digesterBuilder, typeInfo)
require.NoError(t, err)
collisionKeyValues := make(map[Value]Value)
for len(collisionKeyValues) < numOfElementsWithCollision {
k := NewStringValue(randStr(r, int(MaxInlineMapKeySize())-2))
v := NewStringValue(randStr(r, int(MaxInlineMapKeySize())-2))
collisionKeyValues[k] = v
digesterBuilder.On("Digest", k).Return(mockDigester{d: []Digest{0}})
}
for k, v := range collisionKeyValues {
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
nonCollisionKeyValues := make(map[Value]Value)
for i := 0; i < numOfElementsWithoutCollision; i++ {
k := Uint64Value(i)
v := Uint64Value(i)
nonCollisionKeyValues[k] = v
digesterBuilder.On("Digest", k).Return(mockDigester{d: []Digest{Digest(i) + 1}})
existingStorable, err := m.Set(compare, hashInputProvider, k, v)
require.NoError(t, err)
require.Nil(t, existingStorable)
}
count := len(nonCollisionKeyValues) + len(collisionKeyValues)