diff --git a/supernode/daemon/mgr/cdn/super_reader_test.go b/supernode/daemon/mgr/cdn/super_reader_test.go
index d5fa95be7..59bab350e 100644
--- a/supernode/daemon/mgr/cdn/super_reader_test.go
+++ b/supernode/daemon/mgr/cdn/super_reader_test.go
@@ -18,11 +18,13 @@ package cdn
 
 import (
 	"bytes"
+	"context"
 	"crypto/md5"
 	"encoding/binary"
+	"fmt"
 
 	"github.com/dragonflyoss/Dragonfly/pkg/fileutils"
-
+	"github.com/dragonflyoss/Dragonfly/supernode/config"
 	"github.com/go-check/check"
 )
 
@@ -36,7 +38,33 @@ func init() {
 	check.Suite(&SuperReaderTestSuite{})
 }
 
-// TODO: add more unit tests
+func (s *SuperReaderTestSuite) TestReadFile(c *check.C) {
+	testStr1 := []byte("hello ")
+	testStr2 := []byte("dragonfly")
+	testPiece1 := append(append([]byte{0, 0, 0, 6}, testStr1...), 0x7f)
+	testPiece2 := append(append([]byte{0, 0, 0, 9}, testStr2...), 0x7f)
+	testStr := append(testPiece1, testPiece2...)
+
+	contentBuf := &bytes.Buffer{}
+	binary.Write(contentBuf, binary.BigEndian, testStr)
+
+	cacheReader := newSuperReader()
+	result, err := cacheReader.readFile(context.Background(), contentBuf, true, true)
+
+	c.Check(err, check.IsNil)
+	c.Check(int64(len(testStr)), check.Equals, result.fileLength)
+	c.Check(2, check.Equals, result.pieceCount)
+	md5Init := md5.New()
+	md5Init.Write(testPiece1)
+	c.Check(fmt.Sprintf("%s:%d", fileutils.GetMd5Sum(md5Init, nil), len(testStr1)+config.PieceWrapSize), check.Equals, result.pieceMd5s[0])
+	md5Init.Reset()
+	md5Init.Write(testPiece2)
+	c.Check(fmt.Sprintf("%s:%d", fileutils.GetMd5Sum(md5Init, nil), len(testStr2)+config.PieceWrapSize), check.Equals, result.pieceMd5s[1])
+	md5Init.Reset()
+	md5Init.Write(testStr1)
+	md5Init.Write(testStr2)
+	c.Check(fileutils.GetMd5Sum(md5Init, nil), check.Equals, fileutils.GetMd5Sum(result.fileMd5, nil))
+}
 
 func (s *SuperReaderTestSuite) TestGetMD5ByReadFile(c *check.C) {
 	testStr := []byte("hello dragonfly")