For Java, Groovy, Kotlin, and Android compatibility, see the [full compatibility notes](userguide/compatibility.html).   

## New features and usability improvements

<!-- Do not add breaking changes or deprecations here! Add them to the upgrade guide instead. -->

<!--

Lin Sun <******@****.***> 1713406182 -0400

	// Read a count.
	nbytes, _, err := decodeUintReader(dec.r, dec.countBuf)
	if err != nil {
		dec.err = err
		return false
	}
	if nbytes >= tooBig {
		dec.err = errBadCount
		return false
	}
	dec.readMessage(int(nbytes))
	return dec.err == nil
}

// readMessage reads the next nbytes bytes from the input.
func (dec *Decoder) readMessage(nbytes int) {
	if dec.buf.Len() != 0 {

/**
 * Static utility methods pertaining to {@code byte} primitives, that are not already found in
 * either {@link Byte} or {@link Arrays}, <i>and interpret bytes as neither signed nor unsigned</i>.
 * The methods which specifically treat bytes as signed or unsigned are found in {@link SignedBytes}
 * and {@link UnsignedBytes}.
 *
 * <p>See the Guava User Guide article on <a

zirain <******@****.***> 1713320861 +0800

	bufferType := reflect.TypeFor[*bytes.Buffer]()

	nBytes := int64(1 << 10)
	newFileFunc := func() (r io.Reader, done func(), err error) {
		f, err := os.CreateTemp("", "net-http-newfilefunc")
		if err != nil {
			return nil, nil, err
		}

		// Write some bytes to the file to enable reading.
		if _, err := io.CopyN(f, rand.Reader, nBytes); err != nil {

func (s *formatState) parseIndex() bool {
	if s.nbytes == len(s.format) || s.format[s.nbytes] != '[' {
		return true
	}
	// Argument index present.
	s.nbytes++ // skip '['
	start := s.nbytes
	s.scanNum()
	ok := true
	if s.nbytes == len(s.format) || s.nbytes == start || s.format[s.nbytes] != ']' {
		ok = false // syntax error is either missing "]" or invalid index.
		s.nbytes = strings.Index(s.format[start:], "]")

zirain <******@****.***> 1713320861 +0800

lei-tang <******@****.***> 1715889748 -0700

package file

import (
	"archive/tar"
	"bytes"
	"fmt"
	"io"
	"os"
	"path/filepath"
	"strings"

	"github.com/mitchellh/go-homedir"

	"istio.io/istio/pkg/test"
)

// AsBytes is a simple wrapper around os.ReadFile provided for completeness.
func AsBytes(filename string) ([]byte, error) {
	return os.ReadFile(filename)
}

// AsBytesOrFail calls AsBytes and fails the test if any errors occurred.