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tailscale/wgengine/tsdns/map_test.go

157 lines
4.2 KiB
Go

// Copyright (c) 2020 Tailscale Inc & 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 tsdns
import (
"fmt"
"strings"
"testing"
"inet.af/netaddr"
)
func TestPretty(t *testing.T) {
tests := []struct {
name string
dmap *Map
want string
}{
{"empty", NewMap(nil, nil), ""},
{
"single",
NewMap(map[string]netaddr.IP{
"hello.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
}, nil),
"hello.ipn.dev.\t100.101.102.103\n",
},
{
"multiple",
NewMap(map[string]netaddr.IP{
"test1.domain.": netaddr.IPv4(100, 101, 102, 103),
"test2.sub.domain.": netaddr.IPv4(100, 99, 9, 1),
}, nil),
"test1.domain.\t100.101.102.103\ntest2.sub.domain.\t100.99.9.1\n",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := tt.dmap.Pretty()
if tt.want != got {
t.Errorf("want %v; got %v", tt.want, got)
}
})
}
}
func TestPrettyDiffFrom(t *testing.T) {
tests := []struct {
name string
map1 *Map
map2 *Map
want string
}{
{
"from_empty",
nil,
NewMap(map[string]netaddr.IP{
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
"test2.ipn.dev.": netaddr.IPv4(100, 103, 102, 101),
}, nil),
"+test1.ipn.dev.\t100.101.102.103\n+test2.ipn.dev.\t100.103.102.101\n",
},
{
"equal",
NewMap(map[string]netaddr.IP{
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
"test2.ipn.dev.": netaddr.IPv4(100, 103, 102, 101),
}, nil),
NewMap(map[string]netaddr.IP{
"test2.ipn.dev.": netaddr.IPv4(100, 103, 102, 101),
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
}, nil),
"",
},
{
"changed_ip",
NewMap(map[string]netaddr.IP{
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
"test2.ipn.dev.": netaddr.IPv4(100, 103, 102, 101),
}, nil),
NewMap(map[string]netaddr.IP{
"test2.ipn.dev.": netaddr.IPv4(100, 104, 102, 101),
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
}, nil),
"-test2.ipn.dev.\t100.103.102.101\n+test2.ipn.dev.\t100.104.102.101\n",
},
{
"new_domain",
NewMap(map[string]netaddr.IP{
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
"test2.ipn.dev.": netaddr.IPv4(100, 103, 102, 101),
}, nil),
NewMap(map[string]netaddr.IP{
"test3.ipn.dev.": netaddr.IPv4(100, 105, 106, 107),
"test2.ipn.dev.": netaddr.IPv4(100, 103, 102, 101),
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
}, nil),
"+test3.ipn.dev.\t100.105.106.107\n",
},
{
"gone_domain",
NewMap(map[string]netaddr.IP{
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
"test2.ipn.dev.": netaddr.IPv4(100, 103, 102, 101),
}, nil),
NewMap(map[string]netaddr.IP{
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
}, nil),
"-test2.ipn.dev.\t100.103.102.101\n",
},
{
"mixed",
NewMap(map[string]netaddr.IP{
"test1.ipn.dev.": netaddr.IPv4(100, 101, 102, 103),
"test4.ipn.dev.": netaddr.IPv4(100, 107, 106, 105),
"test5.ipn.dev.": netaddr.IPv4(100, 64, 1, 1),
"test2.ipn.dev.": netaddr.IPv4(100, 103, 102, 101),
}, nil),
NewMap(map[string]netaddr.IP{
"test2.ipn.dev.": netaddr.IPv4(100, 104, 102, 101),
"test1.ipn.dev.": netaddr.IPv4(100, 100, 101, 102),
"test3.ipn.dev.": netaddr.IPv4(100, 64, 1, 1),
}, nil),
"-test1.ipn.dev.\t100.101.102.103\n+test1.ipn.dev.\t100.100.101.102\n" +
"-test2.ipn.dev.\t100.103.102.101\n+test2.ipn.dev.\t100.104.102.101\n" +
"+test3.ipn.dev.\t100.64.1.1\n-test4.ipn.dev.\t100.107.106.105\n-test5.ipn.dev.\t100.64.1.1\n",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := tt.map2.PrettyDiffFrom(tt.map1)
if tt.want != got {
t.Errorf("want %v; got %v", tt.want, got)
}
})
}
t.Run("truncated", func(t *testing.T) {
small := NewMap(nil, nil)
m := map[string]netaddr.IP{}
for i := 0; i < 5000; i++ {
m[fmt.Sprintf("host%d.ipn.dev.", i)] = netaddr.IPv4(100, 64, 1, 1)
}
veryBig := NewMap(m, nil)
diff := veryBig.PrettyDiffFrom(small)
if len(diff) > 3<<10 {
t.Errorf("pretty diff too large: %d bytes", len(diff))
}
if !strings.Contains(diff, "truncated") {
t.Errorf("big diff not truncated")
}
})
}