},
		{
			"right bad",
			"/bogus#, javascript:alert(1)",
			"/bogus#,#ZgotmplZ",
		},
	}

	for _, test := range tests {
		if got := srcsetFilterAndEscaper(test.input); got != test.want {
			t.Errorf("%s: srcsetFilterAndEscaper(%q) want %q != %q", test.name, test.input, test.want, got)
		}
	}
}

func BenchmarkURLEscaper(b *testing.B) {
	for i := 0; i < b.N; i++ {

		written = i + 1
	}
	b.WriteString(s[written:])
	return written != 0
}

// Filters and normalizes srcset values which are comma separated
// URLs followed by metadata.
func srcsetFilterAndEscaper(args ...any) string {
	s, t := stringify(args...)
	switch t {
	case contentTypeSrcset:
		return s
	case contentTypeURL:
		// Normalizing gets rid of all HTML whitespace

	"_html_template_jsvalescaper":     jsValEscaper,
	"_html_template_nospaceescaper":   htmlNospaceEscaper,
	"_html_template_rcdataescaper":    rcdataEscaper,
	"_html_template_srcsetescaper":    srcsetFilterAndEscaper,
	"_html_template_urlescaper":       urlEscaper,
	"_html_template_urlfilter":        urlFilter,
	"_html_template_urlnormalizer":    urlNormalizer,
	"_eval_args_":                     evalArgs,
}