}
	if got, want := rfw.readFromBytes, len(input)-bufsize; got != want {
		t.Errorf("wrote %v bytes with ReadFrom, want %v", got, want)
	}
}

func TestReadZero(t *testing.T) {
	for _, size := range []int{100, 2} {
		t.Run(fmt.Sprintf("bufsize=%d", size), func(t *testing.T) {