Cosmetic changes

pkg/storage/donut/fragment/fragment1/fragment.go

@@ -169,8 +169,8 @@ func Read(reader io.Reader) (io.Reader, error) {
 	footerBuffer := make([]byte, 80)
 	reader.Read(footerBuffer)
 	expectedCrc := binary.LittleEndian.Uint32(footerBuffer[:4])
-
 	actualCrc := crc32c.Sum32(footerBuffer[4:])
+
 	if expectedCrc != actualCrc {
 		// TODO perhaps we should return data and still report error?
 		return nil, errors.New("Expected CRC doesn't match for footer")
@@ -195,16 +195,14 @@ func ReadHeader(reader io.Reader) (header DonutFrameHeader, err error) {
 	if headerLength != 32 {
 		return header, errors.New("EOF found while reading donut header")
 	}
+
 	actualCrc := crc32c.Sum32(headerSlice[:24])
-
 	expectedCrc := binary.LittleEndian.Uint32(headerSlice[24:28])
-
 	if actualCrc != expectedCrc {
 		return header, errors.New("CRC for donut did not match")
 	}
 
 	err = binary.Read(bytes.NewBuffer(headerSlice[0:24]), binary.LittleEndian, &header)
-
 	return header, nil
 }
 
@@ -213,6 +211,7 @@ type checksumValue struct {
 	err      error
 }
 
+// calculate sha512 over channel
 func generateChecksum(reader io.Reader, c chan<- checksumValue) {
 	checksum, err := sha512.SumStream(reader)
 	result := checksumValue{

pkg/storage/donut/object/objectv1/objectv1_test.go

@@ -37,11 +37,10 @@ var _ = Suite(&MySuite{})
 func (s *MySuite) TestObjectV1ReadWrite(c *C) {
 	var buffer bytes.Buffer
 
-	data := "Hello, World"
+	data := []byte("Hello, World")
 
 	hash := md5.New()
-	hash.Sum([]byte(data))
-	sum := hash.Sum(nil)
+	sum := hash.Sum(data)
 
 	objectMetadata := ObjectMetadata{
 		Bucket:      "bucket",
@@ -56,7 +55,7 @@ func (s *MySuite) TestObjectV1ReadWrite(c *C) {
 		Length:      uint64(len(sum)),
 	}
 
-	err := Write(&buffer, objectMetadata, bytes.NewBufferString(data))
+	err := Write(&buffer, objectMetadata, bytes.NewBuffer(data))
 	c.Assert(err, IsNil)
 
 	versionBuffer := make([]byte, 4)
@@ -73,5 +72,5 @@ func (s *MySuite) TestObjectV1ReadWrite(c *C) {
 
 	_, err = io.Copy(&actualData, &buffer)
 	c.Assert(err, IsNil)
-	c.Assert(actualData.Bytes(), DeepEquals, []byte(data))
+	c.Assert(actualData.Bytes(), DeepEquals, data)
 }