net/dns/dns_hosts_unittest.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/dns/dns_hosts.h"
   6
   7 #include "testing/gtest/include/gtest/gtest.h"
   8
   9 namespace net {
  10
  11 namespace {
  12
  13 struct ExpectedHostsEntry {
  14   const char* host;
  15   AddressFamily family;
  16   const char* ip;
  17 };
  18
  19 void PopulateExpectedHosts(const ExpectedHostsEntry* entries,
  20                            size_t num_entries,
  21                            DnsHosts* expected_hosts_out) {
  22   for (size_t i = 0; i < num_entries; ++i) {
  23     DnsHostsKey key(entries[i].host, entries[i].family);
  24     IPAddressNumber& ip_ref = (*expected_hosts_out)[key];
  25     ASSERT_TRUE(ip_ref.empty());
  26     ASSERT_TRUE(ParseIPLiteralToNumber(entries[i].ip, &ip_ref));
  27     ASSERT_EQ(ip_ref.size(),
  28         (entries[i].family == ADDRESS_FAMILY_IPV4) ? 4u : 16u);
  29   }
  30 }
  31
  32 TEST(DnsHostsTest, ParseHosts) {
  33   const std::string kContents =
  34       "127.0.0.1       localhost\tlocalhost.localdomain # standard\n"
  35       "\n"
  36       "1.0.0.1 localhost # ignored, first hit above\n"
  37       "fe00::x example company # ignored, malformed IPv6\n"
  38       "1.0.0.300 company # ignored, malformed IPv4\n"
  39       "1.0.0.1 # ignored, missing hostname\n"
  40       "1.0.0.1\t CoMpANy # normalized to 'company' \n"
  41       "::1\tlocalhost ip6-localhost ip6-loopback # comment # within a comment\n"
  42       "\t fe00::0 ip6-localnet\r\n"
  43       "2048::2 example\n"
  44       "2048::1 company example # ignored for 'example' \n"
  45       "127.0.0.1 cache1\n"
  46       "127.0.0.1 cache2 # should reuse parsed IP\n"
  47       "256.0.0.0 cache3 # bogus IP should not clear parsed IP cache\n"
  48       "127.0.0.1 cache4 # should still be reused\n"
  49       "127.0.0.2 cache5\n"
  50       "gibberish";
  51
  52   const ExpectedHostsEntry kEntries[] = {
  53     { "localhost", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
  54     { "localhost.localdomain", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
  55     { "company", ADDRESS_FAMILY_IPV4, "1.0.0.1" },
  56     { "localhost", ADDRESS_FAMILY_IPV6, "::1" },
  57     { "ip6-localhost", ADDRESS_FAMILY_IPV6, "::1" },
  58     { "ip6-loopback", ADDRESS_FAMILY_IPV6, "::1" },
  59     { "ip6-localnet", ADDRESS_FAMILY_IPV6, "fe00::0" },
  60     { "company", ADDRESS_FAMILY_IPV6, "2048::1" },
  61     { "example", ADDRESS_FAMILY_IPV6, "2048::2" },
  62     { "cache1", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
  63     { "cache2", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
  64     { "cache4", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
  65     { "cache5", ADDRESS_FAMILY_IPV4, "127.0.0.2" },
  66   };
  67
  68   DnsHosts expected_hosts, actual_hosts;
  69   PopulateExpectedHosts(kEntries, arraysize(kEntries), &expected_hosts);
  70   ParseHosts(kContents, &actual_hosts);
  71   ASSERT_EQ(expected_hosts, actual_hosts);
  72 }
  73
  74 TEST(DnsHostsTest, ParseHosts_CommaIsToken) {
  75   const std::string kContents = "127.0.0.1 comma1,comma2";
  76
  77   const ExpectedHostsEntry kEntries[] = {
  78     { "comma1,comma2", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
  79   };
  80
  81   DnsHosts expected_hosts, actual_hosts;
  82   PopulateExpectedHosts(kEntries, arraysize(kEntries), &expected_hosts);
  83   ParseHostsWithCommaModeForTesting(
  84       kContents, &actual_hosts, PARSE_HOSTS_COMMA_IS_TOKEN);
  85   ASSERT_EQ(expected_hosts, actual_hosts);
  86 }
  87
  88 TEST(DnsHostsTest, ParseHosts_CommaIsWhitespace) {
  89   std::string kContents = "127.0.0.1 comma1,comma2";
  90
  91   const ExpectedHostsEntry kEntries[] = {
  92     { "comma1", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
  93     { "comma2", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
  94   };
  95
  96   DnsHosts expected_hosts, actual_hosts;
  97   PopulateExpectedHosts(kEntries, arraysize(kEntries), &expected_hosts);
  98   ParseHostsWithCommaModeForTesting(
  99       kContents, &actual_hosts, PARSE_HOSTS_COMMA_IS_WHITESPACE);
 100   ASSERT_EQ(expected_hosts, actual_hosts);
 101 }
 102
 103 // Test that the right comma mode is used on each platform.
 104 TEST(DnsHostsTest, ParseHosts_CommaModeByPlatform) {
 105   std::string kContents = "127.0.0.1 comma1,comma2";
 106
 107 #if defined(OS_MACOSX)
 108   const ExpectedHostsEntry kEntries[] = {
 109     { "comma1", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
 110     { "comma2", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
 111   };
 112 #else
 113   const ExpectedHostsEntry kEntries[] = {
 114     { "comma1,comma2", ADDRESS_FAMILY_IPV4, "127.0.0.1" },
 115   };
 116 #endif
 117
 118   DnsHosts expected_hosts, actual_hosts;
 119   PopulateExpectedHosts(kEntries, arraysize(kEntries), &expected_hosts);
 120   ParseHosts(kContents, &actual_hosts);
 121   ASSERT_EQ(expected_hosts, actual_hosts);
 122 }
 123
 124 TEST(DnsHostsTest, HostsParser_Empty) {
 125   DnsHosts hosts;
 126   ParseHosts("", &hosts);
 127   EXPECT_EQ(0u, hosts.size());
 128 }
 129
 130 TEST(DnsHostsTest, HostsParser_OnlyWhitespace) {
 131   DnsHosts hosts;
 132   ParseHosts(" ", &hosts);
 133   EXPECT_EQ(0u, hosts.size());
 134 }
 135
 136 TEST(DnsHostsTest, HostsParser_EndsWithNothing) {
 137   DnsHosts hosts;
 138   ParseHosts("127.0.0.1 localhost", &hosts);
 139   EXPECT_EQ(1u, hosts.size());
 140 }
 141
 142 TEST(DnsHostsTest, HostsParser_EndsWithWhitespace) {
 143   DnsHosts hosts;
 144   ParseHosts("127.0.0.1 localhost ", &hosts);
 145   EXPECT_EQ(1u, hosts.size());
 146 }
 147
 148 TEST(DnsHostsTest, HostsParser_EndsWithComment) {
 149   DnsHosts hosts;
 150   ParseHosts("127.0.0.1 localhost # comment", &hosts);
 151   EXPECT_EQ(1u, hosts.size());
 152 }
 153
 154 TEST(DnsHostsTest, HostsParser_EndsWithNewline) {
 155   DnsHosts hosts;
 156   ParseHosts("127.0.0.1 localhost\n", &hosts);
 157   EXPECT_EQ(1u, hosts.size());
 158 }
 159
 160 TEST(DnsHostsTest, HostsParser_EndsWithTwoNewlines) {
 161   DnsHosts hosts;
 162   ParseHosts("127.0.0.1 localhost\n\n", &hosts);
 163   EXPECT_EQ(1u, hosts.size());
 164 }
 165
 166 TEST(DnsHostsTest, HostsParser_EndsWithNewlineAndWhitespace) {
 167   DnsHosts hosts;
 168   ParseHosts("127.0.0.1 localhost\n ", &hosts);
 169   EXPECT_EQ(1u, hosts.size());
 170 }
 171
 172 TEST(DnsHostsTest, HostsParser_EndsWithNewlineAndToken) {
 173   DnsHosts hosts;
 174   ParseHosts("127.0.0.1 localhost\ntoken", &hosts);
 175   EXPECT_EQ(1u, hosts.size());
 176 }
 177
 178 }  // namespace
 179
 180 }  // namespace net
 181