break
			}
			runeCount++
			got, _ := utf8.DecodeRune(s.Bytes())
			if got != expect {
				t.Errorf("#%d: %d: expected %q got %q", n, i, expect, got)
			}
		}
		if s.Scan() {
			t.Errorf("#%d: scan ran too long, got %q", n, s.Text())
		}
		testRuneCount := utf8.RuneCountInString(test)
		if runeCount != testRuneCount {
			t.Errorf("#%d: termination expected at %d; got %d", n, testRuneCount, runeCount)
		}
		err := s.Err()