diff --git a/pkg/structure/value_test.go b/pkg/structure/value_test.go
index f0142d4..9ee011e 100644
--- a/pkg/structure/value_test.go
+++ b/pkg/structure/value_test.go
@@ -1,6 +1,7 @@
 package structure
 
 import (
+	"fmt"
 	"strconv"
 	"testing"
 
@@ -126,4 +127,20 @@ func TestValue_SetByte(t *testing.T) {
 	v, err = value.GetByte(10001)
 	require.NoError(t, err)
 	require.Equal(t, v, true)
+	require.Equal(t, value.GetSize(), (10001/8)+1+16)
+}
+
+func TestValue_SetByteWei(t *testing.T) {
+	k := make([]byte, 100)
+	offset := 700
+	k[offset/8] = 0b00000001
+	k[offset/8] |= 0b1 << (offset % 8)
+
+	fmt.Printf("%b\n", k[offset/8])
+
+	fmt.Printf("%v", (k[offset/8]&(0b1<<(offset%8))) != 0)
+
+	k[offset/8] ^= 0b1 << (offset % 8)
+
+	fmt.Printf("%v", (k[offset/8]&(0b1<<(offset%8))) != 0)
 }