mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-15 04:35:17 +00:00
75 lines
2.3 KiB
Go
75 lines
2.3 KiB
Go
// Copyright 2022 The LevelDB-Go and Pebble Authors. All rights reserved. Use
|
|
// of this source code is governed by a BSD-style license that can be found in
|
|
// the LICENSE file.
|
|
|
|
package base
|
|
|
|
import (
|
|
"bytes"
|
|
"testing"
|
|
"unsafe"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
)
|
|
|
|
type valueFetcherFunc func(
|
|
handle []byte, valLen int32, buf []byte) (val []byte, callerOwned bool, err error)
|
|
|
|
func (v valueFetcherFunc) Fetch(
|
|
handle []byte, valLen int32, buf []byte,
|
|
) (val []byte, callerOwned bool, err error) {
|
|
return v(handle, valLen, buf)
|
|
}
|
|
|
|
func TestLazyValue(t *testing.T) {
|
|
// Both 40 and 48 bytes makes iteration benchmarks like
|
|
// BenchmarkIteratorScan/keys=1000,r-amp=1,key-types=points-only 75%
|
|
// slower.
|
|
require.True(t, unsafe.Sizeof(LazyValue{}) <= 32)
|
|
|
|
fooBytes1 := []byte("foo")
|
|
fooLV1 := MakeInPlaceValue(fooBytes1)
|
|
require.Equal(t, 3, fooLV1.Len())
|
|
_, hasAttr := fooLV1.TryGetShortAttribute()
|
|
require.False(t, hasAttr)
|
|
fooLV2, fooBytes2 := fooLV1.Clone(nil, &LazyFetcher{})
|
|
require.Equal(t, 3, fooLV2.Len())
|
|
_, hasAttr = fooLV2.TryGetShortAttribute()
|
|
require.False(t, hasAttr)
|
|
require.Equal(t, fooLV1.InPlaceValue(), fooLV2.InPlaceValue())
|
|
getValue := func(lv LazyValue, expectedCallerOwned bool) []byte {
|
|
v, callerOwned, err := lv.Value(nil)
|
|
require.NoError(t, err)
|
|
require.Equal(t, expectedCallerOwned, callerOwned)
|
|
return v
|
|
}
|
|
require.Equal(t, getValue(fooLV1, false), getValue(fooLV2, false))
|
|
fooBytes2[0] = 'b'
|
|
require.False(t, bytes.Equal(fooLV1.InPlaceValue(), fooLV2.InPlaceValue()))
|
|
|
|
for _, callerOwned := range []bool{false, true} {
|
|
numCalls := 0
|
|
fooLV3 := LazyValue{
|
|
ValueOrHandle: []byte("foo-handle"),
|
|
Fetcher: &LazyFetcher{
|
|
Fetcher: valueFetcherFunc(
|
|
func(handle []byte, valLen int32, buf []byte) ([]byte, bool, error) {
|
|
numCalls++
|
|
require.Equal(t, []byte("foo-handle"), handle)
|
|
require.Equal(t, int32(3), valLen)
|
|
return fooBytes1, callerOwned, nil
|
|
}),
|
|
Attribute: AttributeAndLen{ValueLen: 3, ShortAttribute: 7},
|
|
},
|
|
}
|
|
require.Equal(t, []byte("foo"), getValue(fooLV3, callerOwned))
|
|
require.Equal(t, 1, numCalls)
|
|
require.Equal(t, []byte("foo"), getValue(fooLV3, callerOwned))
|
|
require.Equal(t, 1, numCalls)
|
|
require.Equal(t, 3, fooLV3.Len())
|
|
attr, hasAttr := fooLV3.TryGetShortAttribute()
|
|
require.True(t, hasAttr)
|
|
require.Equal(t, ShortAttribute(7), attr)
|
|
}
|
|
}
|