iotest

Documentation

Overview

Package iotest implements Readers and Writers useful only for testing.

Index

• func DataErrReader(r io.Reader) io.Reader
• func HalfReader(r io.Reader) io.Reader
• func NewReadLogger(prefix string, r io.Reader) io.Reader
• func NewWriteLogger(prefix string, w io.Writer) io.Writer
• func OneByteReader(r io.Reader) io.Reader
• func TruncateWriter(w io.Writer, n int64) io.Writer

Functions

func DataErrReader

func DataErrReader(r io.Reader) io.Reader

DataErrReader returns a Reader that returns the final error with the last data read, instead of by itself with zero bytes of data.

func HalfReader

func HalfReader(r io.Reader) io.Reader

HalfReader returns a Reader that implements Read by reading half as many requested bytes from r.

func NewReadLogger

func NewReadLogger(prefix string, r io.Reader) io.Reader

NewReadLogger returns a reader that behaves like r except that it logs (using log.Print) each read to standard error, printing the prefix and the hexadecimal data written.

func NewWriteLogger

func NewWriteLogger(prefix string, w io.Writer) io.Writer

NewWriteLogger returns a writer that behaves like w except that it logs (using log.Printf) each write to standard error, printing the prefix and the hexadecimal data written.

func OneByteReader

func OneByteReader(r io.Reader) io.Reader

OneByteReader returns a Reader that implements each non-empty Read by reading one byte from r.

func TruncateWriter

func TruncateWriter(w io.Writer, n int64) io.Writer

TruncateWriter returns a Writer that writes to w but stops silently after n bytes.