}

// Test for golang.org/issue/7611
func TestWriterReadFromUntilEOF(t *testing.T) {
	buf := new(bytes.Buffer)
	w := NewWriterSize(buf, 5)

	// Partially fill buffer
	n, err := w.Write([]byte("0123"))
	if n != 4 || err != nil {
		t.Fatalf("Write returned (%v, %v), want (4, nil)", n, err)
	}

	// Use ReadFrom to read in some data.
	r := &emptyThenNonEmptyReader{r: strings.NewReader("abcd"), n: 3}

type IndexFuncTest struct {
	in          string
	f           predicate
	first, last int
}

var indexFuncTests = []IndexFuncTest{
	{"", isValidRune, -1, -1},
	{"abc", isDigit, -1, -1},
	{"0123", isDigit, 0, 3},
	{"a1b", isDigit, 1, 1},
	{space, isSpace, 0, len(space) - 3}, // last rune in space is 3 bytes
	{"\u0e50\u0e5212hello34\u0e50\u0e51", isDigit, 0, 18},