Merge "ResolverTest: add GetAddrInfoV4V6FromCustTable_MultiAnswers"

    EXPECT_EQ(2U, GetNumQueries(dns, hostnameV4V6));

}

TEST_F(ResolverTest, GetAddrInfoV4V6FromCustTable_MultiAnswers) {

    test::DNSResponder dns;

    StartDns(dns, {});

    auto resolverParams = DnsResponderClient::GetDefaultResolverParamsParcel();

    ResolverOptionsParcel resolverOptions;

    resolverOptions.hosts = {

            {kHelloExampleComAddrV4, kHelloExampleCom},

            {kHelloExampleComAddrV6_GUA, kHelloExampleCom},

            {kHelloExampleComAddrV6_IPV4COMPAT, kHelloExampleCom},

            {kHelloExampleComAddrV6_TEREDO, kHelloExampleCom},

    };

    if (!mIsResolverOptionIPCSupported) {

        resolverParams.resolverOptions = resolverOptions;

    }

    ASSERT_TRUE(mDnsClient.resolvService()->setResolverConfiguration(resolverParams).isOk());

    if (mIsResolverOptionIPCSupported) {

        ASSERT_TRUE(mDnsClient.resolvService()

                            ->setResolverOptions(resolverParams.netId, resolverOptions)

                            .isOk());

    }

    addrinfo hints = {.ai_family = AF_UNSPEC, .ai_socktype = SOCK_STREAM};

    ScopedAddrinfo result = safe_getaddrinfo(kHelloExampleCom, nullptr, &hints);

    ASSERT_TRUE(result != nullptr);

    // Expect the order is the same as the order of record insertion because the custom table uses

    // std::multimap to store and the queried results are not sorted by RFC 6724.

    // See getCustomHosts in packages/modules/DnsResolver/getaddrinfo.cpp

    EXPECT_THAT(ToStrings(result),

                testing::ElementsAreArray({kHelloExampleComAddrV4, kHelloExampleComAddrV6_GUA,

                                           kHelloExampleComAddrV6_IPV4COMPAT,

                                           kHelloExampleComAddrV6_TEREDO}));

    EXPECT_EQ(0U, GetNumQueries(dns, kHelloExampleCom));

    hints = {.ai_family = AF_UNSPEC};

    result = safe_getaddrinfo(kHelloExampleCom, nullptr, &hints);

    ASSERT_TRUE(result != nullptr);

    // The overall result is the concatenation of each result from explore_fqdn().

    // resolv_getaddrinfo() calls explore_fqdn() many times by the different explore_options.

    // It means that the results of each explore_options keep the order and concatenates

    // all results into one link list. The address order of the output addrinfo is:

    //   1.2.3.4 (socktype=2, protocol=17) ->

    //   2404:6800::5175:15ca (socktype=2, protocol=17) ->

    //   ::1.2.3.4 (socktype=2, protocol=17) ->

    //   2001::47c1 (socktype=2, protocol=17) ->

    //   1.2.3.4 (socktype=1, protocol=6) ->

    //   2404:6800::5175:15ca (socktype=1, protocol=6) ->

    //   ::1.2.3.4 (socktype=1, protocol=6) ->

    //   2001::47c1 (socktype=1, protocol=6)

    //

    // See resolv_getaddrinfo, explore_fqdn and dns_getaddrinfo.

    EXPECT_THAT(ToStrings(result),

                testing::ElementsAreArray(

                        {kHelloExampleComAddrV4, kHelloExampleComAddrV6_GUA,

                         kHelloExampleComAddrV6_IPV4COMPAT, kHelloExampleComAddrV6_TEREDO,

                         kHelloExampleComAddrV4, kHelloExampleComAddrV6_GUA,

                         kHelloExampleComAddrV6_IPV4COMPAT, kHelloExampleComAddrV6_TEREDO}));

    EXPECT_EQ(0U, GetNumQueries(dns, kHelloExampleCom));

}

TEST_F(ResolverTest, EmptySetup) {

    ASSERT_TRUE(mDnsClient.SetResolversFromParcel(ResolverParamsParcel{.netId = TEST_NETID}));

    const auto resolvInfo = mDnsClient.getResolverInfo();