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// Copyright 2009 The Go Authors. All rights reserved.

// Use of this source code is governed by a BSD-style

// license that can be found in the LICENSE file.

package net

import (

        "sort"

        "testing"

)

type hostTest struct {

        host string

        ips  []IP

}

var hosttests = []hostTest{

        {"odin", []IP{

                IPv4(127, 0, 0, 2),

                IPv4(127, 0, 0, 3),

                ParseIP("::2"),

        }},

        {"thor", []IP{

                IPv4(127, 1, 1, 1),

        }},

        {"loki", []IP{}},

        {"ullr", []IP{

                IPv4(127, 1, 1, 2),

        }},

        {"ullrhost", []IP{

                IPv4(127, 1, 1, 2),

        }},

}

func TestLookupStaticHost(t *testing.T) {

        p := hostsPath

        hostsPath = "hosts_testdata"

        for i := 0; i < len(hosttests); i++ {

                tt := hosttests[i]

                ips := lookupStaticHost(tt.host)

                if len(ips) != len(tt.ips) {

                        t.Errorf("# of hosts = %v; want %v",

                                len(ips), len(tt.ips))

                        return

                }

                for k, v := range ips {

                        if tt.ips[k].String() != v {

                                t.Errorf("lookupStaticHost(%q) = %v; want %v",

                                        tt.host, v, tt.ips[k])

                        }

                }

        }

        hostsPath = p

}

func TestLookupHost(t *testing.T) {

        // Can't depend on this to return anything in particular,

        // but if it does return something, make sure it doesn't

        // duplicate addresses (a common bug due to the way

        // getaddrinfo works).

        addrs, _ := LookupHost("localhost")

        sort.Strings(addrs)

        for i := 0; i+1 < len(addrs); i++ {

                if addrs[i] == addrs[i+1] {

                        t.Fatalf("LookupHost(\"localhost\") = %v, has duplicate addresses", addrs)

                }

        }

}