go/src/testing/iotest/logger_test.go

type errWriter …

func (w errWriter) Write([]byte) (int, error) { … }

func TestWriteLogger(t *testing.T) { … }

func TestWriteLogger_errorOnWrite(t *testing.T) { … }

func TestReadLogger(t *testing.T) { … }

func TestReadLogger_errorOnRead(t *testing.T) { … }