131 lines
2.6 KiB
Go
131 lines
2.6 KiB
Go
package util
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import (
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"io/ioutil"
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"net"
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"os"
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"strings"
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"testing"
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"time"
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"github.com/AdguardTeam/AdGuardHome/internal/aghtest"
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"github.com/miekg/dns"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestMain(m *testing.M) {
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aghtest.DiscardLogOutput(m)
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}
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func prepareTestFile(t *testing.T) (f *os.File) {
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t.Helper()
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dir := t.TempDir()
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f, err := ioutil.TempFile(dir, "")
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require.Nil(t, err)
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require.NotNil(t, f)
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t.Cleanup(func() {
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assert.Nil(t, f.Close())
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})
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return f
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}
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func assertWriting(t *testing.T, f *os.File, strs ...string) {
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t.Helper()
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for _, str := range strs {
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n, err := f.WriteString(str)
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require.Nil(t, err)
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assert.Equal(t, n, len(str))
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}
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}
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func TestAutoHostsResolution(t *testing.T) {
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ah := &AutoHosts{}
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f := prepareTestFile(t)
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assertWriting(t, f,
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" 127.0.0.1 host localhost # comment \n",
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" ::1 localhost#comment \n",
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)
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ah.Init(f.Name())
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t.Run("existing_host", func(t *testing.T) {
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ips := ah.Process("localhost", dns.TypeA)
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require.Len(t, ips, 1)
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assert.Equal(t, net.IPv4(127, 0, 0, 1), ips[0])
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})
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t.Run("unknown_host", func(t *testing.T) {
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ips := ah.Process("newhost", dns.TypeA)
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assert.Nil(t, ips)
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// Comment.
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ips = ah.Process("comment", dns.TypeA)
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assert.Nil(t, ips)
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})
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t.Run("hosts_file", func(t *testing.T) {
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names, ok := ah.List()["127.0.0.1"]
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require.True(t, ok)
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assert.Equal(t, []string{"host", "localhost"}, names)
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})
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t.Run("ptr", func(t *testing.T) {
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testCases := []struct {
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wantIP string
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wantLen int
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wantHost string
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}{
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{wantIP: "127.0.0.1", wantLen: 2, wantHost: "host"},
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{wantIP: "::1", wantLen: 1, wantHost: "localhost"},
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}
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for _, tc := range testCases {
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a, err := dns.ReverseAddr(tc.wantIP)
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require.Nil(t, err)
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a = strings.TrimSuffix(a, ".")
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hosts := ah.ProcessReverse(a, dns.TypePTR)
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require.Len(t, hosts, tc.wantLen)
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assert.Equal(t, tc.wantHost, hosts[0])
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}
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})
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}
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func TestAutoHostsFSNotify(t *testing.T) {
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ah := &AutoHosts{}
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f := prepareTestFile(t)
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assertWriting(t, f, " 127.0.0.1 host localhost \n")
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ah.Init(f.Name())
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t.Run("unknown_host", func(t *testing.T) {
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ips := ah.Process("newhost", dns.TypeA)
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assert.Nil(t, ips)
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})
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// Start monitoring for changes.
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ah.Start()
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t.Cleanup(ah.Close)
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assertWriting(t, f, "127.0.0.2 newhost\n")
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require.Nil(t, f.Sync())
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// Wait until fsnotify has triggerred and processed the
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// file-modification event.
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time.Sleep(50 * time.Millisecond)
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t.Run("notified", func(t *testing.T) {
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ips := ah.Process("newhost", dns.TypeA)
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assert.NotNil(t, ips)
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require.Len(t, ips, 1)
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assert.True(t, net.IP{127, 0, 0, 2}.Equal(ips[0]))
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})
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}
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