diff --git a/byteutil/buffer.go b/byteutil/buffer.go
index c0a6917fe..04eb111cc 100644
--- a/byteutil/buffer.go
+++ b/byteutil/buffer.go
@@ -57,9 +57,24 @@ func (b *Buffer) MustWriteString(ss ...string) {
 	}
 }
 
+// ResetGet buffer string. alias of ResetAndGet()
+func (b *Buffer) ResetGet() string {
+	return b.ResetAndGet()
+}
+
 // ResetAndGet buffer string.
 func (b *Buffer) ResetAndGet() string {
 	s := b.String()
 	b.Reset()
 	return s
 }
+
+// Close buffer
+func (b *Buffer) Close() error {
+	return nil
+}
+
+// Flush buffer
+func (b *Buffer) Flush() error {
+	return nil
+}
diff --git a/byteutil/buffer_test.go b/byteutil/buffer_test.go
index 843c364c5..76c31694a 100644
--- a/byteutil/buffer_test.go
+++ b/byteutil/buffer_test.go
@@ -19,8 +19,11 @@ func TestBuffer_WriteAny(t *testing.T) {
 	assert.Eq(t, "ab-cd-ef", buf.ResetAndGet())
 
 	buf.WriteAny(23, "abc")
-	assert.Eq(t, "23abc", buf.ResetAndGet())
+	assert.Eq(t, "23abc", buf.ResetGet())
 
 	buf.Writeln("abc")
 	assert.Eq(t, "abc\n", buf.ResetAndGet())
+
+	assert.NoErr(t, buf.Close())
+	assert.NoErr(t, buf.Flush())
 }
diff --git a/testutil/fakeobj/io.go b/testutil/fakeobj/io.go
index bca0584b1..8fd341a8f 100644
--- a/testutil/fakeobj/io.go
+++ b/testutil/fakeobj/io.go
@@ -16,6 +16,11 @@ type Writer struct {
 	ErrOnClose bool
 }
 
+// NewBuffer instance. alias of NewWriter()
+func NewBuffer() *Writer {
+	return NewWriter()
+}
+
 // NewWriter instance
 func NewWriter() *Writer {
 	return &Writer{}
@@ -39,28 +44,35 @@ func (w *Writer) SetErrOnClose() *Writer {
 	return w
 }
 
-// Flush implements
-func (w *Writer) Flush() error {
-	if w.ErrOnFlush {
-		return errors.New("flush error")
-	}
-
+// ResetGet buffer string.
+func (w *Writer) ResetGet() string {
+	s := w.String()
 	w.Reset()
-	return nil
+	return s
+}
+
+// Write implements
+func (w *Writer) Write(p []byte) (n int, err error) {
+	if w.ErrOnWrite {
+		return 0, errors.New("fake write error")
+	}
+	return w.Buffer.Write(p)
 }
 
 // Close implements
 func (w *Writer) Close() error {
 	if w.ErrOnClose {
-		return errors.New("close error")
+		return errors.New("fake close error")
 	}
 	return nil
 }
 
-// Write implements
-func (w *Writer) Write(p []byte) (n int, err error) {
-	if w.ErrOnWrite {
-		return 0, errors.New("write error")
+// Flush implements
+func (w *Writer) Flush() error {
+	if w.ErrOnFlush {
+		return errors.New("fake flush error")
 	}
-	return w.Buffer.Write(p)
+
+	w.Reset()
+	return nil
 }