if out := QuoteRuneToASCII(tt.in); out != tt.ascii {
			t.Errorf("QuoteRuneToASCII(%U) = %s, want %s", tt.in, out, tt.ascii)
		}
		if out := AppendQuoteRuneToASCII([]byte("abc"), tt.in); string(out) != "abc"+tt.ascii {
			t.Errorf("AppendQuoteRuneToASCII(%q, %U) = %s, want %s", "abc", tt.in, out, "abc"+tt.ascii)
		}
	}
}

func TestQuoteRuneToGraphic(t *testing.T) {
	for _, tt := range quoterunetests {

	b := []byte("rune:")
	b = strconv.AppendQuoteRune(b, '☺')
	fmt.Println(string(b))

	// Output:
	// rune:'☺'
}

func ExampleAppendQuoteRuneToASCII() {
	b := []byte("rune (ascii):")
	b = strconv.AppendQuoteRuneToASCII(b, '☺')
	fmt.Println(string(b))

	// Output:
	// rune (ascii):'\u263a'
}

func ExampleAppendQuoteToASCII() {
	b := []byte("quote (ascii):")