frostfs-node/pkg/local_object_storage/metabase/index_test.go

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package meta
import (
"crypto/rand"
"math"
mrand "math/rand"
"testing"
"time"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/stretchr/testify/require"
)
func Test_getVarUint(t *testing.T) {
data := make([]byte, 10)
for _, val := range []uint64{0, 0xfc, 0xfd, 0xfffe, 0xffff, 0xfffffffe, 0xffffffff, math.MaxUint64} {
expSize := io.PutVarUint(data, val)
actual, actSize, err := getVarUint(data)
require.NoError(t, err)
require.Equal(t, val, actual)
require.Equal(t, expSize, actSize, "value: %x", val)
_, _, err = getVarUint(data[:expSize-1])
require.Error(t, err)
}
}
func Test_decodeList(t *testing.T) {
t.Run("empty", func(t *testing.T) {
lst, err := decodeList(nil)
require.NoError(t, err)
require.True(t, len(lst) == 0)
})
t.Run("empty, 0 len", func(t *testing.T) {
lst, err := decodeList([]byte{0})
require.NoError(t, err)
require.True(t, len(lst) == 0)
})
t.Run("bad len", func(t *testing.T) {
_, err := decodeList([]byte{0xfe})
require.Error(t, err)
})
t.Run("random", func(t *testing.T) {
r := mrand.New(mrand.NewSource(time.Now().Unix()))
expected := make([][]byte, 20)
for i := range expected {
expected[i] = make([]byte, r.Uint32()%10)
rand.Read(expected[i])
}
data, err := encodeList(expected)
require.NoError(t, err)
actual, err := decodeList(data)
require.NoError(t, err)
require.Equal(t, expected, actual)
t.Run("unexpected EOF", func(t *testing.T) {
for i := 1; i < len(data)-1; i++ {
_, err := decodeList(data[:i])
require.Error(t, err)
}
})
})
}