// lineTooLong is generated as chunk header is bigger than 4KiB.
var errLineTooLong = errors.New("header line too long")

// malformed encoding is generated when chunk header is wrongly formed.
var errMalformedEncoding = errors.New("malformed chunked encoding")

// chunk is considered too big if its bigger than > 16MiB.
var errChunkTooBig = errors.New("chunk too big: choose chunk size <= 16MiB")

		_, err := f.Write(chunk)
		if err != nil {
			t.Fatal("write chunk:", err)
		}
	}
	if frag := int(size % chunkSize); frag > 0 {
		_, err := f.Write(chunk[:frag])
		if err != nil {
			t.Fatal("write chunk:", err)
		}
	}
	end := []byte("END\n")
	_, err = f.Write(end)
	if err != nil {
		t.Fatal("write end:", err)
	}
	if err := w.Close(); err != nil {
		t.Fatal(err)
	}

		if chunkMax == 0 {
			chunkMax = len(b)
		}
	}
	nb := bytealg.MakeNoZero(n)[:n:n]
	bp := copy(nb, b)
	for bp < n {
		chunk := bp
		if chunk > chunkMax {
			chunk = chunkMax
		}
		bp += copy(nb[bp:], nb[:chunk])
	}
	return nb
}

// ToUpper returns a copy of the byte slice s with all Unicode letters mapped to
// their upper case.
func ToUpper(s []byte) []byte {

		},
		// Test - 2 no chunk extension, return same buffer.
		{
			[]byte("10000;"),
			[]byte("10000;"),
			nil,
		},
		// Test - 3 no chunk size, return error.
		{
			[]byte(";chunk-signature="),
			nil,
			nil,
		},
		// Test - 4 removes trailing slash.
		{

	"Content-Type":  true,
	"Content-Md5":   true,
	"User-Agent":    true,
}

// calculateSignedChunkLength - calculates the length of chunk metadata
func calculateSignedChunkLength(chunkDataSize int64) int64 {
	return int64(len(fmt.Sprintf("%x", chunkDataSize))) +
		17 + // ";chunk-signature="
		64 + // e.g. "f2ca1bb6c7e907d06dafe4687e579fce76b37e4e93b7605022da52e6ccc26fd2"
		2 + // CRLF
		chunkDataSize +
		2 // CRLF
}

	if err == io.EOF && size != 0 {
		err = io.ErrUnexpectedEOF
	}
	if err != nil && err != io.EOF {
		cr.err = err
		return n, cr.err
	}

	// If the chunk size is zero we return io.EOF. As specified by AWS,
	// only the last chunk is zero-sized.
	if len(cr.buffer) == 0 {
		if cr.debug {
			fmt.Println("EOF")
		}
		if cr.trailers != nil {
			err = cr.readTrailers()
			if cr.debug {

			accessKey:          credentials.AccessKey,
			secretKey:          credentials.SecretKey,
			shouldPass:         false,
			fault:              malformedEncoding,
		},
		// Test case - 8
		// Chunk with shorter than advertised chunk data.
		{
			bucketName:         bucketName,
			objectName:         objectName,
			data:               oneKData,
			dataLen:            1024,
			chunkSize:          1024,

	*b = Reader{
		buf:          buf,
		rd:           r,
		lastByte:     -1,
		lastRuneSize: -1,
	}
}

var errNegativeRead = errors.New("bufio: reader returned negative count from Read")

// fill reads a new chunk into the buffer.
func (b *Reader) fill() {
	// Slide existing data to beginning.
	if b.r > 0 {
		copy(b.buf, b.buf[b.r:b.w])
		b.w -= b.r
		b.r = 0
	}

	if b.w >= len(b.buf) {

			f.Modified = modified.In(timeZone(msdosModified.Sub(modified)))
		}
	}

	// Assume that uncompressed size 2³²-1 could plausibly happen in
	// an old zip32 file that was sharding inputs into the largest chunks
	// possible (or is just malicious; search the web for 42.zip).
	// If needUSize is true still, it means we didn't see a zip64 extension.
	// As long as the compressed size is not also 2³²-1 (implausible)

			bucketName      string
			objName         string
			uploadID        string
			expectedErrType error
		}{bucket, "\\", uploadID, InvalidUploadID{}})
	}

	// Iterating over creatPartCases to generate multipart chunks.
	for i, testCase := range abortTestCases {
		err = obj.AbortMultipartUpload(context.Background(), testCase.bucketName, testCase.objName, testCase.uploadID, opts)
		if testCase.expectedErrType == nil && err != nil {