["*.foo.*"]              | "com.foo.bar.BarTest"     | "aaaa"                | true
        ["*.foo.*"]              | "foo.Test"                | "aaaa"                | false
        ["*.foo.*"]              | "fooTest"                 | "aaaa"                | false
        ["*.foo.*"]              | "foo"                     | "aaaa"                | false
    }

		answers[i] = r
	}
	return answers
}

// aaaa takes a slice of ip string and returns a slice of AAAA RRs.
func aaaa(host string, ips []netip.Addr) []dns.RR {
	answers := make([]dns.RR, len(ips))
	for i, ip := range ips {
		r := new(dns.AAAA)
		r.Hdr = dns.RR_Header{Name: host, Rrtype: dns.TypeAAAA, Class: dns.ClassINET, Ttl: defaultTTLInSeconds}
		r.AAAA = ip.AsSlice()
		answers[i] = r
	}
	return answers
}

		},
		{
			name:      "success: TypeAAAA query returns AAAA records only",
			host:      "dual.localhost.",
			queryAAAA: true,
			expected:  aaaa("dual.localhost.", []netip.Addr{netip.MustParseAddr("2001:db8:0:0:0:ff00:42:8329")}),
		},
		{
			// This is not a NXDOMAIN, but empty response
			name: "success: Error response if only AAAA records exist for typeA",
			host: "ipv6.localhost.",
		},
		{

		}
	}
}

// Test queries()
func TestQueries(t *testing.T) {
	testCases := []struct {
		keys      []string
		keyvalues []string
	}{
		{
			[]string{"aaaa", "bbbb"},
			[]string{"aaaa", "{aaaa:.*}", "bbbb", "{bbbb:.*}"},
		},
	}

	for i, test := range testCases {
		keyvalues := restQueries(test.keys...)
		for j := range keyvalues {
			if keyvalues[j] != test.keyvalues[j] {

			return
		}
		for _, rr := range res.Answer {
			switch record := rr.(type) {
			case *dns.A:
				out = append(out, record.A.String())
			case *dns.AAAA:
				out = append(out, record.AAAA.String())
			}
		}
		if nextTTL := minimalTTL(res); nextTTL < ttl {
			ttl = nextTTL
		}
	}

	wg.Add(2)
	go doResolve(dns.TypeA)
	go doResolve(dns.TypeAAAA)
	wg.Wait()

	}{
		{"", -1},
		{"\n", -1},
		{"AAA=\n", -1},
		{"AAAA\n", -1},
		{"!!!!", 0},
		{"====", 0},
		{"x===", 1},
		{"=AAA", 0},
		{"A=AA", 1},
		{"AA=A", 2},
		{"AA==A", 4},
		{"AAA=AAAA", 4},
		{"AAAAA", 4},
		{"AAAAAA", 4},
		{"A=", 1},
		{"A==", 1},
		{"AA=", 3},
		{"AA==", -1},
		{"AAA=", -1},
		{"AAAA", -1},
		{"AAAAAA=", 7},
		{"YWJjZA=====", 8},
		{"A!\n", 1},

						cname = h.Name
					}

				case dnsmessage.TypeAAAA:
					aaaa, err := result.p.AAAAResource()
					if err != nil {
						lastErr = &DNSError{
							Err:    errCannotUnmarshalDNSMessage.Error(),
							Name:   name,
							Server: result.server,
						}
						break loop
					}
					addrs = append(addrs, IPAddr{IP: IP(aaaa.AAAA[:])})
					if cname.Length == 0 && h.Name.Length != 0 {
						cname = h.Name

		{"", -1},
		{"!!!!", 0},
		{"x===", 0},
		{"AA=A====", 2},
		{"AAA=AAAA", 3},
		{"MMMMMMMMM", 8},
		{"MMMMMM", 0},
		{"A=", 1},
		{"AA=", 3},
		{"AA==", 4},
		{"AA===", 5},
		{"AAAA=", 5},
		{"AAAA==", 6},
		{"AAAAA=", 6},
		{"AAAAA==", 7},
		{"A=======", 1},
		{"AA======", -1},
		{"AAA=====", 3},
		{"AAAA====", -1},
		{"AAAAA===", -1},
		{"AAAAAA==", 6},
		{"AAAAAAA=", -1},

		expectedMetrics string
		expectedErr     bool
	}{
		{
			desc:            "aaaa with limit 1",
			requestBody:     strings.NewReader("aaaa"),
			limit:           1,
			expectedMetrics: "",
			expectedErr:     true,
		},
		{
			desc:        "aaaa with limit 5",
			requestBody: strings.NewReader("aaaa"),
			limit:       5,
			expectedMetrics: `

		testCase{htmlUnescaper, "", ""},

		testCase{NewReplacer("a", "1", "a", "2", "xxx", "xxx"), "brad", "br1d"},

		testCase{NewReplacer("a", "1", "aa", "2", "aaa", "3"), "aaaa", "1111"},

		testCase{NewReplacer("aaa", "3", "aa", "2", "a", "1"), "aaaa", "31"},
	)

	// gen1 has multiple old strings of variable length. There is no
	// overall non-empty common prefix, but some pairwise common prefixes.
	gen1 := NewReplacer(