testDevNullFile(t, "//./nul")
	}
}

var testLargeWrite = flag.Bool("large_write", false, "run TestLargeWriteToConsole test that floods console with output")

func TestLargeWriteToConsole(t *testing.T) {
	if !*testLargeWrite {
		t.Skip("skipping console-flooding test; enable with -large_write")
	}
	b := make([]byte, 32000)
	for i := range b {
		b[i] = '.'
	}
	b[len(b)-1] = '\n'

	}
}

// largeWriter returns an invalid count that is larger than the number
// of bytes provided (issue 39978).
type largeWriter struct {
	err error
}

func (w largeWriter) Write(p []byte) (int, error) {
	return len(p) + 1, w.err
}

func TestCopyLargeWriter(t *testing.T) {
	want := ErrInvalidWrite
	rb := new(Buffer)
	wb := largeWriter{}
	rb.WriteString("hello, world.")

        randomAccessFile!!.getChannel(),
      )
    val buffer = Buffer()
    operator.read(0, buffer, data.size.toLong())
    assertThat(buffer.readByteString()).isEqualTo(data)
  }

  @Test
  fun largeWrite() {
    val data = randomByteString(1000000)
    val operator =
      FileOperator(
        randomAccessFile!!.getChannel(),
      )
    val buffer = Buffer().write(data)