go emitDNSNameTest(ch)
	for tc := range ch {
		if isDomainName(tc.name) != tc.result {
			t.Errorf("isDomainName(%q) = %v; want %v", tc.name, !tc.result, tc.result)
		}
	}
}

func BenchmarkDNSName(b *testing.B) {
	testHookUninstaller.Do(uninstallTestHooks)

	benchmarks := append(dnsNameTests, []dnsNameTest{
		{strings.Repeat("a", 63), true},
		{strings.Repeat("a", 64), false},
	}...)